CN102621395A - Capacitor measurement circuit structure with charge transfer circuit - Google Patents

Capacitor measurement circuit structure with charge transfer circuit Download PDF

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CN102621395A
CN102621395A CN 201110035562 CN201110035562A CN102621395A CN 102621395 A CN102621395 A CN 102621395A CN 201110035562 CN201110035562 CN 201110035562 CN 201110035562 A CN201110035562 A CN 201110035562A CN 102621395 A CN102621395 A CN 102621395A
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charge transfer
terminal
connected
voltage
electrically connected
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CN 201110035562
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Chinese (zh)
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张宝兴
连政清
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瑞益电子股份有限公司
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Abstract

The invention provides a capacitor measurement circuit structure with a charge transfer circuit. The structure comprises a selection module, a signal processing control module and a charge transfer module. The selection module is used for electrically connecting with a capacitor to be measured and enabling the capacitor to be measured to be electrically connected with the signal processing control module selectively. The charge transfer module receives a control signal outputted by the signal processing control module so as to adjust the output voltage of an adjustable voltage supply unit in the charge transfer module and enable a voltage comparison signal outputted by the signal processing control module to approach a specific value gradually. Thereby, through transferring a load of the capacitor to be measured to a sampling capacitor in the charge transfer circuit, an efficacy of obtaining a capacitance value of the capacitor to be measured or obtaining the capacitance value change of the capacitor to be measured is achieved.

Description

具有电荷转移电路的电容量测电路结构 The capacitance sensing circuit structure having a charge transfer circuit

技术领域 FIELD

[0001] 本发明涉及一种电容量测电路结构,特别是涉及一种具有电荷转移电路的电容量测电路结构。 [0001] The present invention relates to a capacitance sensing circuit structure, particularly to a capacitance sensing circuit having a structure of the charge transfer circuit.

背景技术 Background technique

[0002] 随着科技的发展,一般人在日常生活中可以经常接触到触控式荧幕、触控式开关等等以触控方式操作的产品。 [0002] With the development of technology, most people in everyday life can often come into contact with the touch screen, touch-sensitive switches and the like of products in a touch manner. 其中,可借由触控方式操作的产品大多使用了电容式开关,而电容式开关通过感应待测电容的电容值大小是否产生变化,进而判断使用者接近与否来进行控制。 Wherein, the product may be by a touch operated mostly using capacitive switch, the capacitive switch is generated by changing the capacitance value of the magnitude of the induced capacitance to be measured, so as to determine whether or not to control user access. 现有的技术大多应用电容量测电路来感测电容式开关的电容值变化,以回应于使用者的操作而达到对应的控制。 The prior art most applications the capacitance sensing circuit to sense a change in the capacitance value of the measured capacitive switch, in response to a user's operation to achieve the corresponding control.

[0003]目前已发展出利用电荷转移技术的电容量测电路,其中在电荷转移技术中大概分为充电阶段及电荷转移阶段等两个阶段,在充电阶段中是使待测电容与一电压源电性连接,以使得电荷可累积至待测电容中。 [0003] It has been developed using a capacitance sensing circuit of the charge transfer technique, wherein the charge transfer in the art roughly divided into two stages charge phase and the charge transfer phase, etc., is that the charging phase of the capacitor under a voltage source electrically connected, so that the charge can be accumulated in the capacitance to be measured. 而在电荷转移阶段中,再使储存在待测电容中的电荷释放至已知电容中。 In the charge transfer phase, and then measured the charge stored in the capacitor is released to a known capacitance. 上述两个阶段会重复多次,以提高已知电容的电压,之后每次转移至已知电容的电荷量会以指数比率减少。 Both stages will be repeated multiple times to increase the voltage of the capacitor is known, then each was transferred to a known capacitance of the charge amount will be reduced at an exponential rate. 接着,可将已知电容的电压与一参考电压作比较,再利用比较器及/或模拟数字转换器并配合相关处理电路,以取得待测电容的电容值或是电容变化。 Next, the voltage may be compared with a known reference voltage of the capacitor, the capacitance value of re-use or change in capacitance of the comparator and / or the analog-digital converter and associated with a processing circuit to obtain measured capacitance.

[0004] 为了可更准确地量测待测电容的电容值或是得知待测电容的电容值是否产生变化,各界无不致力于开发电容量测电路,并且如何设计出成本较低、灵敏度高且反应速度快的电容量测电路实为业界不断致力的方向之一。 [0004] In order to measure the capacitance value of the amount of available capacity to be measured more accurately or know whether the capacitance value of the capacitance to be measured produces a change, all circles to develop the capacitance sensing circuit, and how to design a low cost, high sensitivity fast response and the capacitance sensing circuit is one of a solid continuous efforts of the industry direction.

发明内容 SUMMARY

[0005] 本发明的目的在于,提供一种新型结构的具有电荷转移电路的电容量测电路结构,所要解决的技术问题是使其借由电荷转移电路使待测电容中的电荷转移至电荷转移电路中的取样电容,并通过信号处理控制模块产生控制信号,以调节电荷转移电路中可调式电压供应单元产生的电压,进而适性地调整待测电容两端的电压差,借此取得待测电容的电容值或得知待测电容的电容值是否产生变化,非常适于实用。 [0005] The object of the present invention is to provide a novel configuration of the capacitance sensing circuit structure having a charge transfer circuit, the technical problem to be solved by means of a charge transfer circuit so that the measured capacitance charge transfer to the charge transfer sampling capacitor circuit, the signal processing and control module generates a control signal to adjust the voltage of the charge transfer circuit to produce an adjustable voltage supply unit, thereby adaptively adjusting the voltage across the capacitance difference measured, whereby the measured capacitance to obtain or that the capacitance value of capacitance of the capacitor is tested whether a change is very suitable for practical use.

[0006] 本发明的另一目的在于,提供一种新型结构的具有电荷转移电路的多工电容量测电路结构,所要解决的技术问题是使其可以在初级信号处理模块后串接多级次级信号处理模块,借此加快信号处理的速度,进而提高电容量测电路结构的反应速度,从而更加适于实用。 [0006] Another object of the present invention is to provide a multi-structure having a capacitance sensing circuit of the charge transfer circuit of a new structure, to solve the technical problem that it can be cascaded multiple times after the initial stage the signal processing module level signal processing module, whereby the signal processing speed, and thus increase the reaction rate of the capacitance sensing circuit structure, which is more suitable for practical use.

[0007] 本发明的目的及解决其技术问题是采用以下技术方案来实现的。 [0007] The objects and solve the technical problem of the invention is achieved by the following technical solutions. 依据本发明提出的一种具有电荷转移电路的电容量测电路结构,用以侦测至少一待测电容,其包括:一选择模块,其包括:一第一选择单元及一第二选择单元,其中该待测电容电性连接于该第一选择单元及该第二选择单元之间;一信号处理控制模块,其包括:一电压比较单元,其具有:一第一输入端,其串联于该第一选择单兀的一端;一第二输入端,其串联于该第二选择单兀的一端;以及一第一输出端,其用以输出一电压比较信号;一第一开关,其电性连接于该第一输入端及该第二输入端之间;以及一控制信号产生单元,其具有:一第三输入端,其电性连接于该第一输出端以接收该电压比较信号;以及一第二输出端及一第三输出端,其用以分别输出一控制信号;以及一电荷转移模块,其包括:一第一电荷转移电路,其包括:一第一可调式电压供应 The electrical capacitance sensing circuit having a structure of a charge transfer circuit made according to the invention, at least one test for detecting capacitance, comprising: a selection module, comprising: a first selecting unit, and a second selecting unit, wherein the measured capacitor is electrically connected between the first selection and the second selection unit means; a control signal processing module, comprising: a voltage comparison unit, having: a first input terminal, which is connected in series to the one end of a first single selected Wu; a second input terminal, which is connected in series with one end of the second select single Wu; and a first output terminal, the voltage comparator for outputting a signal; a first switch electrically connected between the first input terminal and the second input terminal; and a control signal generating unit, which has: a third input terminal electrically connected to the first output terminal for receiving the voltage comparison signal; a second output and a third output terminal which outputs to a control signal; and a charge transfer module, comprising: a first charge transfer circuit, comprising: a first adjustable voltage supply 元,其输入端电性连接于该第二输出端用以接收该控制信号;以及一第一取样电容,其具有:一第一端点,其电性连接于该第一可调式电压供应单兀的输出端;以及一第二端点,其电性连接于该第一输入端;以及一第二电荷转移电路,其包括:一第二可调式电压供应单元,其输入端电性连接于该第三输出端用以接收该控制信号;以及一第二取样电容,其具有:一第三端点,其电性连接于该第二可调式电压供应单元的输出端;以及一第四端点,其电性连接于该第二输入端;其中,该控制信号产生单元在第N周期时读取该电压比较信号,以决定该控制信号,借此使该电压比较信号于第N+1周期时较该第N周期时更趋近于一特定值,其中N为正整数。 Element having an input terminal electrically connected to the second output terminal for receiving the control signal; and a first sampling capacitor, having: a first end which is electrically connected to the first voltage supply adjustable single Wu output terminal; and a second terminal electrically connected to the first input terminal; and a second charge transfer circuit, comprising: a second adjustable voltage supply unit, an input terminal electrically connected to the a third output terminal for receiving the control signal; and a second sampling capacitor, having: a third terminal electrically connected to the output terminal of the second adjustable voltage supply unit; and a fourth terminal, which electrically connected to the second input terminal; wherein the control signal generating unit reads the voltage comparison signal when the N-th cycle to determine the control signal, whereby the voltage at the first comparison signal is compared with N + 1 cycle more close to a specific value when the first N cycles, where N is a positive integer. [0008] 本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。 [0008] The objects and solve the technical problem of the present invention can also be further achieved by the following technical measures.

[0009] 前述的具有电荷转移电路的电容量测电路结构,其中所述的第一可调式电压供应单兀为一第一电阻式数字模拟转换电路,其电压输入端接收一第一上限电压及一第一下限电压,并且该第一电阻式数字模拟转换电路的控制端电性连接于该第二输出端以受该控制信号控制,以使该第一电阻式数字模拟转换电路输出一第一模拟电压,而该第一电阻式数字模拟转换电路的该输出端又借由一第二开关选择性电性连接于该第一端点,并且该第一端点又借由一第三开关选择性电性连接于一第一参考电压源,以接收一第一参考电压。 [0009] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein said first adjustable voltage supply is a single Wu first resistive digital to analog conversion circuit receives a voltage input terminal and the first upper limit voltage a first lower limit voltage, and the first control terminal electrically resistive digital to analog conversion circuit is connected to the second output terminal by the control signal, so that the first resistive digital to analog converter circuit outputs a first an analog voltage, and the output of the first resistive digital to analog conversion circuit in turn connected by means of a second switch selectively electrically to the first terminal, and the first endpoint, and by means of a third switch selection resistance electrically connected to a first reference voltage source, to receive a first reference voltage.

[0010] 前述的具有电荷转移电路的电容量测电路结构,其中所述的第二可调式电压供应单元为一第二电阻式数字模拟转换电路,其电压输入端接收一第二上限电压及一第二下限电压,并且该第二电阻式数字模拟转换电路的控制端电性连接于该第三输出端以受该控制信号控制,以使该第二电阻式数字模拟转换电路输出一第二模拟电压,而该第二电阻式数字模拟转换电路的该输出端又借由一第四开关选择性电性连接于该第三端点,并且该第三端点又借由一第五开关选择性电性连接于一第二参考电压源,以接收一第二参考电压。 [0010] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein said second adjustable voltage supply unit is a second resistor digital-analog conversion circuit, which receives a voltage input terminal and a second upper limit voltage a second lower limit voltage, and the control terminal of the second resistor digital-analog conversion circuit is connected to the third output terminal to receiving the control signal, so that the second resistive digital to analog converter circuit outputs a second analog voltage, and the second resistive digital to analog conversion circuit in turn connected to the output terminal by means of a fourth switch selectively electrically to the third terminal, and the third endpoint, and by means of a fifth switch selectively electrically connected to a second reference voltage source, to receive a second reference voltage.

[0011] 前述的具有电荷转移电路的电容量测电路结构,其中所述的第一选择单元包括:一第六开关,其串接于该第一输入端;以及一第七开关,其串接于该第六开关;以及该第二选择单元包括:一第八开关,其串接于该第二输入端;以及一第九开关,其串接于该第八开关,其中该待测电容的一端电性连接于该第六开关及该第七开关之间的一第一节点,且该待测电容的另一端电性连接于该第八开关及该第九开关之间的一第二节点。 [0011] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein said first selection unit comprises: a sixth switch connected in series to the first input terminal; and a seventh switch connected in series at the sixth switch; and a second selecting unit comprises: an eighth switch connected in series to the second input terminal; and a ninth switch, which is connected in series with the eighth switch, wherein the capacitance is measured one end of a second node is electrically connected to a node between the sixth switch and the seventh switch, and the other end of the capacitor under test is electrically connected between the eighth switch and the ninth switch .

[0012] 前述的具有电荷转移电路的电容量测电路结构,其中所述的第一选择单元及该第二选择单元分别为一多工器,以选择性电性连接于一该待测电容。 [0012] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein said first selecting means and the second selecting means are a multiplexer for selectively electrically connected to one of the measured capacitance.

[0013] 前述的具有电荷转移电路的电容量测电路结构,其中所述的信号处理控制模块进一步包括至少一模拟信号处理电路,其串联于该第一开关与该电压比较单元之间。 [0013] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein said signal processing control module further includes at least one analog signal processing circuit, which is connected in series between the switch and the first voltage comparing unit.

[0014] 前述的具有电荷转移电路的电容量测电路结构,其中所述的模拟信号处理电路包括:一模拟式滤波器,其输入端串接于该第一开关;以及一可调程序化放大器,其输入端串接于该模拟式滤波器的输出端,该可调程序化放大器的输出端串接于该电压比较单元。 [0014] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein the analog signal processing circuit comprising: an analog filter having an input terminal connected in series to the first switch; and programming an adjustable amplifier , an input terminal connected in series to the output of the analog filter, an adjustable program of the output of the amplifier connected in series to the voltage comparison unit.

[0015] 前述的具有电荷转移电路的电容量测电路结构,其中所述的模拟信号处理电路包括:一可调程序化放大器,其输入端串接于该第一开关;以及一模拟式滤波器,其输入端串接于该可调程序化放大器的输出端,该模拟式滤波器的输出端串接于该电压比较单元。 [0015] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein the analog signal processing circuit comprising: an adjustable programmable amplifier having an input terminal connected in series to the first switch; and an analog filter , an input terminal connected in series to the output of the adjustable programmable amplifier, the output of the analog filter is connected in series to the voltage comparison unit.

[0016] 前述的具有电荷转移电路的电容量测电路结构,其中所述的控制信号产生单元为一快闪式(Flash)模拟数字转换器或一逐次逼近型(SAR)模拟数字转换器。 [0016] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, wherein said control signal generating means is a flash (Flash) analog-digital converter or a successive approximation (SAR) analog to digital converter.

[0017] 前述的具有电荷转移电路的电容量测电路结构,其进一步包括一控制模块,其控制该第一选择单元及该第二选择单元,使该待测电容选择性地与该第一输入端及该第二输入端电性连接。 [0017] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit, further comprising a control module that controls the first selecting unit and the second selection unit for selectively inputting the measured capacitance with the first input terminal and the second terminal is electrically connected.

[0018] 本发明的目的及解决其技术问题还采用以下技术方案来实现。 [0018] The objects and solve the technical problem of the present invention is also achieved by the following technical solution. 依据本发明提出的一种具有电荷转移电路的多工电容量测电路结构,用以侦测至少一待测电容,其包括:一第一选择模块,其包括:一第一选择单元及一第二选择单元,其中该待测电容电性连接于该第一选择单元及该第二选择单元之间;一初级信号处理模块,其包括:一初级信号处理控制模块,其输入端与该第一选择单元及该第二选择单元电性连接,且其输出端输出一初级控制信号;以及一初级电荷转移模块,其输入端接收该初级控制信号,其输出端电性连接于该初级信号处理控制模块的输入端;以及至少一次级信号处理模块,且每一该次级信号处理模块依序彼此串接,该些次级信号处理模块中第一级的该次级信号处理模块串接于该初级信号处理模块,其中每一该次级信号处理模块包括:一第二选择模块,其输入端电性连接于前一级的该初级信号 The electrical capacitance sensing circuit structure having a multi-charge-transfer circuit proposed by the present invention, at least one test for detecting capacitance, comprising: a first and a second selection unit: a first selection module, comprising two selection unit, wherein the measured capacitor is electrically connected between the first selection means and the second selecting unit; a primary signal processing module, comprising: a primary control signal processing module and the first input terminal selecting means and the second selection unit is electrically connected, and an output terminal outputting a primary control signal; and a primary charge transfer module, which receives the primary input control signal, an output terminal electrically connected to the primary signal processing control the module inputs; and at least one secondary signal processing module, and each of the secondary signal processing module connected in series with each other sequentially, the plurality of secondary signal processing module in a first stage of the secondary signal processing module in the series a primary signal processing module, wherein each of the secondary signal processing module comprises: a second selection module, an input terminal electrically connected to the primary signal of the previous stage 理控制模块或前一级的一次级信号处理控制模块的输入端;该次级信号处理控制模块,其输入端与该第二选择模块电性连接,且其输出端输出一次级控制信号;以及一次级电荷转移模块,其输入端接收前一级输出的该初级控制信号或前一级输出的该次级控制信号,该次级电荷转移模块的输出端电性连接于该次级信号处理控制模块的输入端。 A processing control module level signal processing control module input or preceding stage; the secondary signal processing control module, an input terminal connected to the second electrically selection module, and an output terminal outputting a secondary control signal; a secondary charge transfer module, the secondary control signal to the primary control signal output from a front end of a receiver input or output before the output terminal of the secondary charge transfer modules connected to the secondary signal processing control input of the converter. [0019] 本发明的目的及解决其技术问题还可采用以下技术措施进一步实现。 [0019] objects and solve the technical problem of the present invention can also be further achieved by the following technical measures.

[0020] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的初级信号处理控制模块包括:一初级电压比较单元,其具有:一第一输入端,其电性连接于该第一选择单元的一端;一第二输入端,其串联于该第二选择单兀的一端;以及一第一输出端,其用以输出一第一电压比较信号;一第一开关,其电性连接于该第一输入端及该第二输入端之间;以及一初级控制信号产生单元,其具有:一第三输入端,其电性连接于该第一输出端以接收该第一电压比较信号;以及一第二输出端及一第三输出端,其用以分别输出该初级控制信号。 [0020] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein the primary control signal processing module comprises: a primary voltage comparison unit, having: a first input terminal electrically connected to the one end of the first selection unit; a second input terminal, which is connected in series with one end of the second select single Wu; and a first output terminal, the first voltage comparator for outputting a signal; a first switch electrically connected between the first input terminal and the second input terminal; and a primary control signal generating unit, which has: a third input terminal electrically connected to the first output terminal to receive the first voltage comparison signal; and a second output and a third output terminal which outputs to the primary control signal.

[0021] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的初级信号处理控制模块进一步包括至少一第一模拟信号处理电路,其串联于该第一开关与该初级电压比较单元之间。 [0021] The foregoing multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein the primary signal processing control module further includes at least a first analog signal processing circuit, a first switch in series to the primary voltage is compared with the between units.

[0022] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第一模拟信号处理电路包括:一第一模拟式滤波器,其输入端串接于该第一开关;以及一第一可调程序化放大器,其输入端串接于该第一模拟式滤波器的输出端,而该第一可调程序化放大器的输出端串接于该初级电压比较单元。 [0022] The foregoing multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein said first analog signal processing circuit comprising: a first analog filter having an input terminal connected in series to the first switch; and programming a first adjustable amplifier having an input terminal connected in series with the output terminal of the first analog filter, and the output terminal of the first adjustable programmable amplifier in series with the primary voltage of the comparing unit.

[0023] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第一模拟信号处理电路包括:一第一可调程序化放大器,其输入端串接于该第一开关;以及一第一模拟式滤波器,其输入端串接于该第一可调程序化放大器的输出端,该第一模拟式滤波器的输出端串接于该初级电压比较单元。 [0023] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein said first analog signal processing circuit comprising: a first adjustable programmable amplifier having a first input terminal connected in series to the switch; and a first analog filter having an input terminal connected in series to the output terminal of the first programmable adjustable amplifier, an output terminal of the first analog filter is connected in series with the primary voltage comparison unit.

[0024] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的初级控制信号产生单元为一快闪式(Flash)模拟数字转换器或一逐次逼近型(SAR)模拟数字转换器。 [0024] The foregoing multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein the primary control signal generating unit is an analog digital converter is a flash (Flash) or a successive approximation (SAR) analog to digital conversion device.

[0025] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的初级电荷转移模块,包括:一第一电荷转移电路,其包括:一第一可调式电压供应单元,其输入端电性连接于该第二输出端用以接收该初级控制信号;及一第一取样电容,其具有:一第一端点,其电性连接于该第一可调式电压供应单元的输出端;以及一第二端点,其电性连接于该第一输入端;以及一第二电荷转移电路,其包括:一第二可调式电压供应单元,其输入端电性连接于该第三输出端用以接收该初级控制信号;及一第二取样电容,其具有:一第三端点,其电性连接于该第二可调式电压供应单元的输出端;以及一第四端点,其电性连接于该第二输入端。 [0025] The foregoing multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein said primary charge transfer module, comprising: a first charge transfer circuit, comprising: a first adjustable voltage supply unit which inputs terminal electrically connected to the second output terminal for receiving the primary control signal; and a first sampling capacitor, having: a first end which is electrically connected to the output terminal of the first voltage supply unit is adjustable ; and a second terminal electrically connected to the first input terminal; and a second charge transfer circuit, comprising: a second adjustable voltage supply unit, an input terminal electrically connected to the third output terminal for receiving the primary control signal; and a second sampling capacitor, having: a third terminal electrically connected to the output terminal of the second adjustable voltage supply unit; and a fourth terminal electrically connected to to the second input terminal. [0026] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第一可调式电压供应单兀为一第一电阻式数字模拟转换电路,其电压输入端接收一第一上限电压及一第一下限电压,并且该第一电阻式数字模拟转换电路的控制端电性连接于该第二输出端以受该初级控制信号控制,以使该第一电阻式数字模拟转换电路输出一第一模拟电压,又该第一电阻式数字模拟转换电路的该输出端又借由一第二开关选择性电性连接于该第一端点,并且该第一端点又借由一第三开关选择性电性连接于一第一参考电压源,以接收一第一参考电压;以及该第二可调式电压供应单元为一第二电阻式数字模拟转换电路,其电压输入端接收一第二上限电压及一第二下限电压,并且该第二电阻式数字模拟转换电路的控制端电性连接于该第三输出端以受该初级控制信号控制,以 [0026] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein said first adjustable voltage supply is a single Wu first resistive digital to analog conversion circuit, the voltage input terminal receives a first upper limit a first voltage and a lower limit voltage, and the control terminal of the first electrically resistive digital to analog converter circuit is connected to the second output terminal to the primary by the control signal, so that the first resistive digital to analog converter circuit output a first analog voltage, should the output terminal of the first resistive digital to analog conversion circuit in turn connected by means of a second switch selectively electrically to the first terminal, and the first endpoint, and by means of a three switch selectively electrically connected to a first reference voltage source, to receive a first reference voltage; and a second adjustable voltage supply unit is a second resistive digital to analog conversion circuit receiving a first voltage input terminal two second limit voltage and a lower limit voltage, and the control terminal of the second resistor digital-analog conversion circuit is connected to the third output terminal to the primary by the control signal, to 使该第二电阻式数字模拟转换电路输出一第二模拟电压,而该第二电阻式数字模拟转换电路的该输出端又借由一第四开关选择性电性连接于该第三端点,并且该第三端点又借由一第五开关选择性电性连接于一第二参考电压源,以接收一第二参考电压。 The second resistive digital to analog converter circuit outputs a second analog voltage, and the output of the second resistive digital to analog conversion circuit in turn connected by means of a fourth switch selectively electrically to the third terminal, and the third terminal is connected in turn by means of a fifth switch selectively electrically to a second reference voltage source, to receive a second reference voltage.

[0027] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第一选择单元包括:一第六开关,其串接于该第一输入端;以及一第七开关,其串接于该第六开关;以及该第二选择单元包括:一第八开关,其串接于该第二输入端;以及一第九开关,其串接于该第八开关,其中该待测电容的一端电性连接于该第六开关及该第七开关之间的一第一节点,且该待测电容的另一端电性连接于该第八开关及该第九开关之间的一第二节点。 [0027] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein said first selection unit comprises: a sixth switch connected in series to the first input terminal; and a seventh switch which the sixth switch connected in series; and a second selecting unit comprises: an eighth switch connected in series to the second input terminal; and a ninth switch, the eighth switch which is connected in series, wherein the test one end of a capacitor connected to a node between the sixth switch and the seventh switch, and the other end electrically connected to a capacitor to be measured between the first switch and the ninth switch eighth two nodes.

[0028] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第二选择模块包括:一第三选择单元及一第四选择单元,且该第三选择单元及该第四选择单元之间电性连接有一转移电容。 [0028] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein said second selection module comprising: a third selection unit, and a fourth selecting unit, and the third and the fourth selection means selecting unit is electrically connected between a transfer capacitance.

[0029] 前述的具有电荷转移电路的多工电容量测电路结构,其中在第一级的该次级信号处理模块中,该第三选择单元电性连接于该第一选择单元的一端,而该第四选择单元则电性连接于该第二选择单元的一端。 [0029] The aforementioned multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein in the first stage of the secondary signal processing module, the third selection unit is electrically connected to one end of the first selection unit, and the fourth selection means is electrically connected to one end of the second selection unit.

[0030] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的次级信号处理模块中,该第三选择单元电性连接于前一级的该第三选择单元,而该第四选择单元则电性连接于前一级的该第四选择单元。 [0030] The foregoing structure has a capacitance sensing circuit of the charge transfer multiplex circuit, wherein said secondary signal processing module, a third selection unit which is electrically connected to a previous stage of the third selection unit, which fourth selection means is electrically connected to the previous stage of the fourth selection means.

[0031] 前述的具有电荷转移电路的多工电容量测电路结构,其中每一该次级信号处理控制模块包括:一次级电压比较单元,其具有:一第四输入端,其串联于该第三选择单元的一端;一第五输入端,其串联于该第四选择单兀的一端;以及一第四输出端,其用以输出一第二电压比较信号;一第十开关,其电性连接于该第四输入端及该第五输入端之间;以及一次级控制信号产生单元,其具有:一第六输入端,其电性连接于该第四输出端以接收该第二电压比较信号;以及一第五输出端及一第六输出端,其用以分别输出该次级控制信号。 [0031] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein each of the secondary control signal processing module comprising: a secondary voltage comparison unit, comprising: a fourth input terminal, which is connected in series to the first one end of the three selection unit; a fifth input, which is connected in series to a single end of the fourth selection Wu; and a fourth output terminal, the second voltage comparator for outputting a signal; a tenth switch which is electrically connected between the fourth input terminal and said fifth input terminal; and a level control signal generating unit, comprising: a sixth input which is electrically connected to the fourth output terminal for receiving the second voltage comparator signal; and a fifth output terminal and a sixth output terminal, the output for each of the secondary control signal.

[0032] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的次级信号处理控制模块进一步包括至少一第二模拟信号处理电路,其串联于该第十开关与该次级电压比较单元之间。 [0032] The aforementioned multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein the secondary control signal processing module further comprises at least a second analog signal processing circuit, which is connected in series with the secondary of the tenth switch the voltage between the comparison unit.

[0033] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第二模拟信号处理电路包括:一第二模拟式滤波器,其输入端串接于该第十开关;以及一第二可调程序化放大器,其输入端串接于该第二模拟式滤波器的输出端,该第二可调程序化放大器的输出端串接于该次级电压比较单元。 [0033] The foregoing multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein said second analog signal processing circuit comprises: a second analog filter having an input of the tenth switch connected in series; and programming a second adjustable amplifier, an input terminal connected in series with the output terminal of the second analog filter, an adjustable program of the second output of the amplifier in series with the secondary voltage comparison unit.

[0034] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第二模拟信号处理电路包括:一第二可调程序化放大器,其输入端串接于该第十开关;以及一第二模拟式滤波器,其输入端串接于该第二可调程序化放大器的输出端,该第二模拟式滤波器的输出端串接于该次级电压比较单元。 [0034] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein said second analog signal processing circuit comprises: a second adjustable programmable amplifier having an input terminal of the tenth switch connected in series; and a second analog filter having an input terminal connected in series to the second output terminal of programmable adjustable amplifier, an output terminal of the second analog filter is connected in series with the secondary voltage comparison unit.

[0035] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的次级控制信号产生单元为一快闪式(Flash)模拟数字转换器或一逐次逼近型(SAR)模拟数字转换器。 [0035] The aforementioned multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein the secondary control signal generating unit according to a flash (Flash) analog-digital converter or a successive approximation (SAR) analog to digital converter.

[0036] 前述的具有电荷转移电路的多工电容量测电路结构,其中第一级的该次级电荷转移模块,其包括:一第三电荷转移电路,其包括:一第三可调式电压供应单元,其输入端电性连接于该第二输出端,以接收该初级控制信号;及一第三取样电容,其具有:一第五端点,其电性连接于该第三可调式电压供应单元的输出端;以及一第六端点,其电性连接于该第四输入端;以及一第四电荷转移电路,其包括:一第四可调式电压供应单元,其输入端电性连接于该第三输出端,以接收该初级控制信号;及一第四取样电容,其具有:一第七端点,其电性连接于该第四可调式电压供应单元的输出端;以及一第八端点,其电性连接于该第五输入端。 [0036] The foregoing structure has a capacitance sensing circuit multiplexing charge transfer circuit, wherein the first stage of the secondary charge transfer module, comprising: a third charge transfer circuit, comprising: a third adjustable voltage supply It means having an input terminal electrically connected to the second output terminal, for receiving the primary control signal; and a third sampling capacitor, having: a fifth terminal electrically connected to the third adjustable voltage supply unit an output terminal; and a sixth terminal, which is electrically connected to the fourth input terminal; and a fourth charge transfer circuit, comprising: a fourth adjustable voltage supply unit, an input terminal electrically connected to the second three output terminals to receive the primary control signal; and a fourth sampling capacitor, having: a seventh terminal, which is electrically connected to the fourth output terminal adjustable voltage supply unit; and an eighth terminal, which It is electrically connected to the fifth input.

[0037] 前述的具有电荷转移电路的多工电容量测电路结构,其中除第一级的该次级电荷转移模块外,每一级该次级电荷转移电路包括:一第五电荷转移电路,其包括:一第五可调式电压供应单元,其输入端电性连接于前一级该次级信号处理控制模块的该第五输出端,以接收该次级控制信号;及一第五取样电容,其具有:一第九端点,其电性连接于该第五可调式电压供应单元的输出端;以及一第十端点,其电性连接于该第四输入端;以及一第六电荷转移电路,其包括:一第六可调式电压供应单元,其输入端电性连接于前一级该次级信号处理控制模块的该第六输出端,以接收该次级控制信号;及一第六取样电容,其具有:一第十一端点,其电性连接于该第六可调式电压供应单元的输出端;以及一第十二端点,其电性连接于该第五输入端。 [0037] The aforementioned multi-structure having a capacitance sensing circuit of the charge transfer circuit, which in addition to the first stage of the secondary charge transfer modules, each one of the secondary charge transfer circuit comprising: a fifth charge transfer circuit, comprising: a fifth adjustable voltage supply unit, an input terminal electrically connected to the front stage of the fifth output signal of the secondary process control module to receive the secondary control signal; and a fifth sampling capacitor having: a ninth terminal electrically connected to the output terminal of the fifth adjustable voltage supply unit; and a tenth terminal, which is electrically connected to the fourth input terminal; and a sixth charge transfer circuit comprising: a sixth adjustable voltage supply unit, the sixth output terminal of the secondary signal processing control module which is electrically connected to the input terminal of a previous stage, to receive the secondary control signal; and a sixth sample capacitor, comprising: an eleventh terminal, which is electrically connected to the output of the sixth adjustable voltage supply unit; and a twelfth terminal, which is electrically connected to the fifth input.

[0038] 前述的具有电荷转移电路的多工电容量测电路结构,其中所述的第一选择单元及该第二选择单元分别为一多工器,以选择性电性连接于一该待测电容。 [0038] The foregoing multi-structure having a capacitance sensing circuit of the charge transfer circuit, wherein said first selecting means and said second selecting means are a multiplexer for selectively electrically connected to one of said test capacitance.

[0039] 前述的具有电荷转移电路的多工电容量测电路结构,其进一步包括一控制模块,其控制该第一选择单元、该第二选择单元及每一该第二选择模块中一第三选择单元及一第四选择单元的开关状态。 [0039] The foregoing structure has a capacitance sensing circuit of the charge transfer circuit multiplexing, further comprising a control module that controls the first selecting unit, the second selecting unit, and each of the second to a third selection module selection means and a fourth switching state of the selected cell.

[0040] 本发明与现有技术相比具有明显的优点和有益效果。 [0040] The prior art and the present invention has obvious advantages and beneficial effects compared. 借由上述技术方案,本发明具有电荷转移电路的电容量测电路结构至少具有下列优点及有益效果:[0041 ] 本发明通过可调式电压供应单元控制其输出的电压,进而适性地调整待测电容两端的电压差,借此可以取得待测电容的电容值或是得知待测电容的电容值是否产生变化。 The capacitance sensing circuit structures by means of the above technical solutions, the present invention having a charge transfer circuit having at least the following advantages and beneficial effects: [0041] The present invention is adjustable by a control voltage supply unit outputting the voltage, thereby adaptively adjusted test the voltage difference across the capacitor, whereby the capacitance value of the capacity to be measured can be obtained or to know whether the capacitance of the capacitor to be measured changes.

[0042] 本发明借由在初级信号处理模块后串接多级次级信号处理模块,以通过多级信号处理进而提高电容量测电路结构的反应速度。 [0042] The present invention is by means of a multi-stage cascaded secondary signal processing module after the primary signal processing modules to further increase the reaction rate measured capacitance circuit configuration of multi-stage signal processing. [0043] 综上所述,本发明是有关于一种具有电荷转移电路的电容量测电路结构,其包括:选择模块;信号处理控制模块;以及电荷转移模块。 [0043] In summary, the present invention is the capacitance sensing circuit having a configuration relates to a charge transfer circuit, comprising: a selection module; controlling the signal processing module; and a charge transfer module. 选择模块用以电性连接待测电容,并且使待测电容可选择性地与信号处理控制模块电性连接,而电荷转移模块接受信号处理控制模块输出的控制信号,以调整电荷转移模块中可调式电压供应单元的输出电压,并使得信号处理控制模块所输出的电压比较信号逐渐趋近于某一特定值。 Selection module for electrically connecting the capacitor to be measured, and the measured capacitor selectively connected to the signal processing module is electrically controlled, and the charge transfer module receives the control signal output from the signal processing control module to adjust the charge transfer modules can be output voltage adjustment of the voltage supply unit of formula, and comparing the voltage signal output by the signal processing control module gradually approaches a certain value. 借由通过将待测电容的电荷转移至电荷转移电路中的取样电容,以达到取得待测电容的电容值或是得知待测电容的电容值变化的功效。 By means of charge transfer capacity to be measured by a sampling capacitor to charge transfer circuit, to achieve the capacity to be measured to obtain the capacitance value of the capacitance value or change in the efficacy of known measured capacitance. 本发明在技术上有显著的进步,并具有明显的积极效果,诚为一新颖、进步、实用的新设计。 The present invention is technically significant progress, and have a significant positive effect - for a novel, progressive and practical new design.

[0044] 上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,而可依照说明书的内容予以实施,并且为了让本发明的上述和其他目的、特征和优点能够更明显易懂,以下特举较佳实施例,并配合附图,详细说明如下。 [0044] The above description is only an overview of the technical solution of the present invention, in order to more fully understood from the present invention, but may be implemented in accordance with the contents of the specification, and in order to make the aforementioned and other objects, features and advantages of the present invention can be more apparent from the following Patent cited preferred embodiments accompanied with figures are described in detail below.

附图说明 BRIEF DESCRIPTION

[0045] 图IA是本发明第一实施例的一种具有电荷转移电路的电容量测电路结构的示意图。 [0045] FIG IA is an example of a schematic view of a first embodiment of the present invention, the circuit configuration of a capacitance sensing circuit with charge transfer.

[0046] 图IB是本发明第一实施例的另一实施形态的具有电荷转移电路的电容量测电路结构的示意图。 [0046] FIG. IB is a schematic diagram of an electrical configuration of a capacitance sensing circuit of another embodiment of the first embodiment of the present invention having a charge transfer circuit.

[0047] 图IC是本发明第一实施例又一实施形态的具有电荷转移电路的电容量测电路结构的示意图。 [0047] FIG IC is a schematic electrical configuration of a capacitance sensing circuit embodiment of still another embodiment of a charge transfer circuit having a first embodiment of the present invention.

[0048] 图2A是本发明第一实施例的一种具有电荷转移电路的电容量测电路在充电阶段的电路结构的示意图。 [0048] FIG. 2A is a first embodiment of the present invention, a schematic view of a circuit configuration of a charging phase of the capacitance sensing circuit having a charge transfer circuit.

[0049] 图2B是本发明第一实施例的一种具有电荷转移电路的电容量测电路在电荷转移阶段的电路结构的示意图。 [0049] FIG. 2B is a first embodiment of the present invention, a schematic diagram circuit configuration of the capacitance sensing circuit of the charge transfer circuit having a charge transfer stage.

[0050] 图3是本发明第一实施例的一种具有电荷转移电路的电容量测电路结构的信号时序图。 [0050] FIG. 3 is a first embodiment of the present invention having a signal timing diagram of the circuit configuration of a capacitance sensing circuit of the charge transfer.

[0051] 图4是本发明第一实施例的一种具有电荷转移电路的电容量测电路结构的电压比较信号的示意图。 [0051] FIG. 4 is an embodiment schematic view of the first embodiment of the present invention, the voltage comparison signal capacitance sensing circuit configuration of a charge transfer circuit with.

[0052] 图5A是本发明第二实施例的一种具有电荷转移电路的多工电容量测电路结构的示意图。 [0052] FIG 5A is a schematic diagram of a second embodiment of the present invention, multi-capacitance sensing circuit having a configuration of a charge transfer circuit.

[0053] 图5B是本发明第二实施例的另一实施形态的具有电荷转移电路的多工电容量测电路结构的示意图。 [0053] FIG 5B is a schematic view of a multi-station configuration of a capacitance sensing circuit having a charge transfer circuit according to another embodiment of the second aspect of the embodiment of the present invention.

[0054] 图5C是本发明第二实施例又一实施形态的具有电荷转移电路的多工电容量测电路结构的不意图。 [0054] FIG 5C is a second embodiment of the present invention is not intended to still another embodiment of the charge transfer circuit having a multi-station configuration of a capacitance sensing circuit.

[0055] 图6是本发明第二实施例再一实施形态的具有电荷转移电路的多工电容量测电路结构的不意图。 [0055] FIG. 6 is a second embodiment of a further embodiment of the present invention is not intended charge transfer circuit having a multi-station configuration of a capacitance sensing circuit. [0056] 图7A是本发明第二实施例在第一充电阶段的电路结构的示意图。 [0056] FIG. 7A is a diagram showing a circuit configuration of a second embodiment of the present invention in a first charging phase.

[0057] 图7B是本发明第二实施例在第一电荷转移阶段的电路结构的示意图。 [0057] FIG. 7B is a diagram showing a circuit configuration of a second embodiment of the present invention, in a first charge transfer stage.

[0058] 图7C是本发明第二实施例在第二充电阶段的电路结构的示意图。 [0058] FIG 7C is a diagram showing a circuit configuration of a second embodiment of the present invention in a second charging phase.

[0059] 图7D是本发明第二实施例在第二电荷转移阶段的电路结构的示意图。 [0059] FIG 7D is a diagram showing a circuit configuration of a second embodiment of the present invention in a second charge transfer stage. [0060] 图7E是本发明第二实施例在第三充电阶段的电路结构的示意图。 [0060] Figure 7E is a diagram showing a circuit configuration of a second embodiment of the present invention in a third charging phase.

[0061] 图7F是本发明第二实施例在第三电荷转移阶段的电路结构的示意图。 [0061] Figure 7F is a diagram illustrating a circuit configuration of a second embodiment of the present invention, in the third charge transfer stage.

[0062] 图7G是本发明第二实施例在第四充电阶段的电路结构的示意图。 [0062] Figure 7G is a diagram showing a circuit configuration of a second embodiment of the present invention in a fourth embodiment of the charging phase.

[0063] 图7H是本发明第二实施例在第四电荷转移阶段的电路结构的示意图。 [0063] FIG 7H is a schematic diagram of a circuit configuration of a second embodiment of the present invention in a fourth embodiment of the charge transfer phase.

[0064] 图8是本发明第二实施例逐次逼近型模拟数字转换器的信号时序图。 [0064] FIG. 8 is a successive approximation analog to digital converter is a signal timing diagram of a second embodiment of the present invention.

[0065]图9是本发明第二实施例快闪式模拟数字转换器的信号时序图。 [0065] FIG 9 is a signal timing diagram of the flash analog to digital converter of a second embodiment of the present invention.

[0066] 图10是本发明第一实施例及第二实施例的信号时序的对照图。 [0066] FIG. FIG. 10 is a control signal timing according to the first embodiment and the second embodiment of the present invention.

[0067] 10 :选择模块 10' :第一选择模块 [0067] 10: selection module 10 ': a first selection module

[0068] 10”:第二选择模块 11:第一选择单元 [0068] 10 ': second selection module 11: first selecting unit

[0069] 12 :第二选择单元 13:电压源 [0069] 12: second selecting unit 13: voltage source

[0070] 13a:第一参考电压源 13b:第二参考电压源 [0070] 13a: a first reference voltage source 13b: second reference voltage source

[0071] 13c:参考电压源 14:第三选择单元 [0071] 13c: a reference voltage source 14: third selection means

[0072] 15:第四选择单元 20:信号处理控制模块 [0072] 15: a fourth selecting unit 20: signal processing control module

[0073] 21:电压比较单元 22 :控制信号产生单元 [0073] 21: a voltage comparison unit 22: control signal generating unit

[0074] 23:模拟信号处理电路 23a:模拟式滤波器 [0074] 23: an analog signal processing circuit 23a: analog filter

[0075] 23b :可调程序化放大器 30 :电荷转移模块 [0075] 23b: programmed adjustable amplifier 30: charge transfer modules

[0076] 30' :初级电荷转移模块 30”:次级电荷转移模块 [0076] 30 ': Primary charge transfer modules 30 ": secondary charge transfer modules

[0077] 31:第一电荷转移电路 31a :第一可调式电压供应单元 [0077] 31: a first charge transfer circuit 31a: a first adjustable voltage supply unit

[0078] 31b :第一电阻式数字模拟转换电路32:第二电荷转移电路 [0078] 31b: a first resistive digital-analog conversion circuit 32: second charge transfer circuit

[0079] 32a :第二可调式电压供应单元32b :第二电阻式数字模拟转换电路 [0079] 32a: a second adjustable voltage supply unit 32b: second resistive digital to analog converter circuit

[0080] 33:第三电荷转移电路 33a :第三可调式电压供应单元 [0080] 33: third charge transfer circuit 33a: a third adjustable voltage supply unit

[0081] 34:第四电荷转移电路 34a:第四可调式电压供应单元 [0081] 34: fourth charge transfer circuit 34a: fourth adjustable voltage supply unit

[0082] 35:第五电荷转移电路 35a :第五可调式电压供应单元 [0082] 35: a fifth charge transfer circuit 35a: fifth adjustable voltage supply unit

[0083] 36:第六电荷转移电路 36a :第六可调式电压供应单元 [0083] 36: a sixth charge transfer circuit 36a: Sixth adjustable voltage supply unit

[0084] 40、40a、40b、40c、40d :待测电容 [0084] 40,40a, 40b, 40c, 40d: measured capacitance

[0085] 41、41'、41”:转移电容 [0085] 41, 41 ', 41 ": transferring capacitance

[0086] 50 :控制模块 60 :初级信号处理模块 [0086] 50: a control module 60: a primary signal processing module

[0087] 61 :初级信号处理控制模块 61a:初级电压比较单元 [0087] 61: a primary signal processing control module 61a: primary voltage comparing unit

[0088] 61b :初级控制信号产生单兀 62 :第一模拟信号处理电路 [0088] 61b: Wu primary control signal generating unit 62: first analog signal processing circuit

[0089] 62a :第一模拟式滤波器 62b :第一可调程序化放大器 [0089] 62a: a first analog filter 62b: programming a first adjustable amplifier

[0090] 70、70'、70” :次级信号处理模块71 :次级信号处理控制模块 [0090] 70, 70 ', 70 ": the secondary signal processing module 71: a secondary signal processing control module

[0091] 71a、71a'、71a”:次级电压比较单元 [0091] 71a, 71a ', 71a ": secondary voltage comparison unit

[0092] 71b、71b'、71b” :次级控制信号产生单元 [0092] 71b, 71b ', 71b ": the secondary control signal generation unit

[0093] 72 :第二模拟信号处理电路 72a :第二模拟式滤波器 [0093] 72: second analog signal processing circuit 72a: a second analog filter

[0094] 72b :第二可调程序化放大器 SI :第一开关[0095] S2 :第二开关 S3 :第三开关 [0094] 72b: second adjustable amplifier programmed SI: first switch [0095] S2: second switch S3: third switch

[0096] S4:第四开关 S5:第五开关 [0096] S4: fourth switch S5: fifth switch

[0097] S6 :第六开关 S7 :第七开关 [0097] S6: sixth switch S7: seventh switch

[0098] S8 :第八开关 S9 :第九开关 [0098] S8: eighth switch S9: ninth switch

[0099] S10、S10'、S10” :第十开关 S11-S34:开关 [0099] S10, S10 ', S10 ": tenth switch S11-S34: Switch

[0100] Il :第一输入端 12 :第二输入端 [0100] Il: a first input terminal 12: a second input terminal

[0101] 13:第三输入端 14、14':第四输入端 [0101] 13: third input terminal 14, 14 ': a fourth input terminal

[0102] 15、15' :第五输入端 16 :第六输入端 [0102] 15, 15 ': a fifth input 16: the sixth input terminal

[0103] 01 :第一输出端 02 :第二输出端 [0103] 01: a first output terminal 02: a second output terminal

[0104] 03 :第三输出端 04 :第四输出端 [0104] 03: a third output terminal 04: a fourth output terminal

[0105] 05 :第五输出端 06 :第六输出端 [0105] 05: fifth output 06: the output of the sixth

[0106] Cl :第一取样电容 C2 :第二取样电容 [0106] Cl: a first sampling capacitor C2: second sampling capacitor

[0107] C3:第三取样电容 C4:第四取样电容 [0107] C3: third sampling capacitor C4: fourth sampling capacitor

[0108] C5、C5' :第五取样电容 C6、C6' :第六取样电容 [0108] C5, C5 ': the fifth sampling capacitor C6, C6': a sixth sampling capacitor

[0109] Pl :第一端点 P2 :第二端点 [0109] Pl: first endpoint P2: second endpoint

[0110] P3:第三端点 P4:第四端点 [0110] P3: third endpoint P4: fourth terminal

[0111] P5:第五端点 P6:第六端点 [0111] P5: fifth terminal P6: sixth terminal

[0112] P7:第七端点 P8:第八端点 [0112] P7: seventh terminal P8: eighth terminal

[0113] P9:第九端点 P10:第十端点 [0113] P9: Ninth endpoint P10: X Endpoint

[0114] Pll :第^ 端点 P12 :第十二端点 [0114] Pll: ^ first end P12: twelfth endpoint

[0115] NI :第一节点 N2:第二节点 [0115] NI: a first node N2: node

具体实施方式 Detailed ways

[0116] 为更进一步阐述本发明为达成预定发明目的所采取的技术手段及功效,以下结合附图及较佳实施例,对依据本发明提出的具有电荷转移电路的电容量测电路结构其具体实施方式、结构、特征及其功效,详细说明如后。 [0116] To further elaborate the technical means and effects the present invention is predetermined to achieve the object of the invention taken in conjunction with the accompanying drawings and the following preferred embodiments, the capacitance sensing circuit of the charge transfer circuit having a structure according to the present invention is set forth specific embodiment, the structure, characteristics and efficacy, as will be described in detail.

[0117] 有关本发明的前述及其他技术内容、特点及功效,在以下配合参考图式的较佳实施例的详细说明中将可清楚呈现。 [0117] For the aforementioned and other technical contents, characteristics and effects of the present invention, it can be clearly presented in the detailed description of the preferred embodiment with reference to the drawings in the following. 通过具体实施方式的说明,当可对本发明为达成预定目的所采取的技术手段及功效获得一更加深入且具体的了解,然而所附图式仅是提供参考与说明之用,并非用来对本发明加以限制。 By way of illustration specific embodiments, when the technical means and effects can of the present invention is to achieve a predetermined object taken to obtain a more thoroughly and concretely appreciated however, that the appended drawings are merely provided for reference and illustration, and is not used to the present invention be limited.

[0118]【第一实施例】 [0118] [First Embodiment]

[0119] 图IA是本发明第一实施例的一种具有电荷转移电路的电容量测电路结构的示意图。 [0119] FIG IA is an example of a schematic view of a first embodiment of the present invention, the circuit configuration of a capacitance sensing circuit with charge transfer. 图IB是本发明第一实施例的另一实施形态的具有电荷转移电路的电容量测电路结构的示意图。 FIG IB is a schematic electrical configuration of a capacitance sensing circuit according to another embodiment of the first embodiment of the present invention having a charge transfer circuit. 图IC是本发明第一实施例又一实施形态的具有电荷转移电路的电容量测电路结构的示意图。 It is a schematic diagram showing an IC capacitance sensing circuit configuration of still another embodiment of an electrical embodiment of a charge transfer circuit having a first embodiment of the present invention. 图2A是本发明第一实施例的一种具有电荷转移电路的电容量测电路在充电阶段的电路结构的示意图。 FIG 2A is a diagram illustrating a circuit configuration of a capacitance sensing circuit of a first embodiment of the present invention having a charge transfer circuit is in charging phase. 图2B是本发明第一实施例的一种具有电荷转移电路的电容量测电路在电荷转移阶段的电路结构的示意图。 FIG 2B is a diagram showing a circuit configuration of a capacitance sensing circuit of a first embodiment of the present invention having a charge transfer circuit in the charge transfer stage. 图3是本发明第一实施例的一种具有电荷转移电路的电容量测电路结构的信号时序图。 FIG 3 is a first embodiment of the present invention having a signal timing diagram of the circuit configuration of a capacitance sensing circuit of the charge transfer. 图4是本发明第一实施例的一种具有电荷转移电路的电容量测电路结构的电压比较信号的示意图。 FIG 4 is a first embodiment of the present invention, a schematic diagram of the voltage comparator signal capacitance sensing circuit configuration of a charge transfer circuit with. [0120] 如图IA所不,本发明第一实施例为一种具有电荷转移电路的电容量测电路结构,其包括:一选择模块10 ;—信号处理控制模块20 ;以及一电荷转移模块30。 [0120] FIG IA is not, the first embodiment of the present invention having a capacitance sensing circuit structure of the charge transfer circuit, comprising: a selection module 10; - a signal processing control module 20; and a charge transfer modules 30 . 本实施例的电容量测电路结构可用以侦测至少一待测电容40,也就是说,可用以侦测一至多个电容的电容值大小或电容值的变化。 The capacitance sensing circuit structure of the present embodiment is used to detect at least a capacitor 40 to be measured, i.e., magnitude values ​​can be used to detect changes in capacitance or a capacitance value to a plurality of capacitors.

[0121] 选择模块10,其包括:一第一选择单元11及一第二选择单元12,其中待测电容40电性连接于第一选择单元11及第二选择单元12之间,而第一选择单元11及第二选择单元12的一端又分别与两电压源13电性连接,可借由切换第一选择单元11及第二选择单元12使待测电容40接收两电压源13输出的电压,借此使待测电容40充电。 [0121] selection module 10, which includes: a first selecting unit 11 and a second selecting unit 12, wherein the measured capacitor 40 is electrically connected between the first selection unit 12 and the second selecting means 11, and the first One end of the selection unit 11 and the second selection unit 12 in turn is electrically connected to the two voltage source 13, so that the test can be switched by means of a first capacitor 11 and the second selecting means selecting unit 12 40 receives the output voltage of two voltage source 13 , whereby the charging capacitor 40 is measured. 充电后的待测电容40又可借由切换第一选择单元11及第二选择单元12而电性连接于信号处理控制模块20。 After charging the capacitor 40 to be tested in turn by means of the first selection switch 11 and the second unit selection unit 12 is electrically connected to the signal processing control module 20.

[0122] 信号处理控制模块20,其包括:一电压比较单元21 ;—第一开关SI ;以及一控制信号产生单元22。 [0122] The signal processing control module 20, comprising: a voltage comparison unit 21; - a first switch the SI; and a control signal generating unit 22.

[0123] 电压比较单兀21,其具有:一第一输入端Il ;一第二输入端12 ;以及一第一输出端01。 [0123] Wu single voltage comparator 21, having: a first input terminal Il; a second input terminal 12; and a first output terminal 01. 其中,第一输入端Il与第一选择单兀11的一端串接,而第二输入端12则与第二选择单元12的一端串接,进而与待测电容40电性连接,以比较待测电容40两端间的电压,而第一输出端01则据此输出一电压比较信号。 Wherein a first input terminal Il of the first selection unit 11 is connected in series Wu one end, and a second input terminal 12 connected in series with one end of the second selection unit 12, in turn is electrically connected to the capacitor 40 to be measured, to compare pending voltage across capacitance measurement 40, and a first output terminal 01 accordingly outputs a voltage comparison signal.

[0124] 第一开关SI,其电性连接于电压比较单兀21的第一输入端Il及第二输入端12之间,当第一开关SI为“0N”时,即使得第一输入端Il及第二输入端12短路,借此消除电路中的偏移电位。 [0124] a first switch SI, which is electrically connected to the voltage between the first input and the second input terminal Il 21 12 Comparative single Wu, when the first switch SI is "0N", even have a first input terminal Il a second input terminal 12 and a short circuit, thereby eliminating the offset voltage in the circuit.

[0125] 控制信号产生单元22可以为一快闪式(Flash)模拟数字转换器或一逐次逼近型(SAR)模拟数字转换器,且控制信号产生单兀22具有:一第三输入端13 ;—第二输出端02 ;以及一第三输出端03。 [0125] control signal generating unit 22 may be a flash (Flash) analog-digital converter or a successive approximation (SAR) analog to digital converter, and a control signal generating unit 22 Wu having: a third input terminal 13; - a second output terminal 02; and a third output terminal 03. 第三输入端13电性连接于电压比较单兀21的第一输出端01,用以接收电压比较信号,而第二输出端02及第三输出端03则用以分别输出一控制信号,其中控制信号为一数字信号。 A third input terminal 13 is electrically connected to a first voltage comparing unit Wu output terminal 0121, and for receiving the comparison signal voltage, a third output terminal 02 and a second output terminal 03 for outputting a control signal, respectively, wherein control signal is a digital signal. 控制信号产生单元22在第N周期时读取电压比较单元21产生的电压比较信号,以决定控制信号,并借由控制信号使得电压比较信号在第N+1周期时较第N周期时更趋近于一特定值,其中N为正整数。 When the control signal generating unit 22 reads the first N cycles of the voltage comparison unit comparing the voltage signal 21 generated to determine the control signal and the control signal by means of the comparison signal such that the voltage at the N + 1 cycle period become more than the first N close to a specific value, where N is a positive integer.

[0126] 电荷转移模块30,其包括:一第一电荷转移电路31 ;以及一第二电荷转移电路32。 [0126] charge transfer module 30, comprising: a first charge transfer circuit 31; and a second charge transfer circuit 32. 其中,第一电荷转移电路31包括:一第一可调式电压供应单兀31a ;以及一第一取样电容Cl,而第二电荷转移电路32则包括:一第二可调式电压供应单元32a ;以及一第二取样电容C2。 Wherein the first charge transfer circuit 31 comprises: a first adjustable voltage supply single Wu 31a; and a first sampling capacitor Cl, and the second charge transfer circuit 32 comprises: a second adjustable voltage supply unit 32a; and a second sampling capacitor C2.

[0127] 如图IB所示,第一可调式电压供应单元31a,其可以为一第一电阻式数字模拟转换电路31b,例如可以是加权电阻式数字模拟转换器或R-2R梯形式数字模拟转换器。 [0127] As shown in FIG IB, a first adjustable voltage supply unit 31a, which may be a first resistor digital-analog conversion circuit 31b, for example, may be a weighted resistance type DAC or the R-2R ladder digital to analog form converter. 第一电阻式数字模拟转换电路31b的电压输入端可进一步接收一第一上限电压及一第一下限电压,使第一电阻式数字模拟转换电路31b的输出电压的范围介于第一上限电压及第一下限电压之间。 Voltage input of the first resistive digital to analog converter circuit 31b may further receive a first upper voltage and a first lower limit voltage, the resistance of the first digital to analog converter circuit 31b of the output voltage range between a first upper voltage and between the first lower limit voltage. 第一电阻式数字模拟转换电路31b的输入端(即控制端)电性连接于控制信号产生单元22的第二输出端02,以受控制信号的控制,并根据控制信号调整其输出的电压大小进而输出一第一模拟电压。 A first input terminal of a resistive digital to analog converter circuit 31b (i.e., control terminal) is electrically connected to the second output control signal generation unit 22 of the terminal 02, the voltage magnitude controlled by the control signal and adjusts its output according to a control signal, and further outputs a first analog voltage.

[0128] 如图IA所不,第一取样电容Cl,其具有:一第一端点Pl及一第二端点P2,其中第一端点Pl电性连接于第一可调式电压供应单元31a的输出端,而第二端点P2则电性连接于电压比较单兀21的第一输入端II。 [0128] FIG IA is not, the first sampling capacitor Cl, having: a first end and a second end P2 Pl, Pl wherein a first terminal is electrically connected to a first adjustable voltage supply unit 31a, an output terminal, the second terminal P2 is electrically connected to the voltage comparator first input terminal of the single Wu II 21 in. 换言之,第一取样电容Cl电性连接于电压比较单兀21的第一输入端Il及第一可调式电压供应单元31a的输出端之间。 In other words, the first sampling capacitor Cl electrically connected to the voltage between the first input terminal Il 21 and an output terminal of a first adjustable voltage supply unit 31a of the comparison single Wu.

[0129] 又如图IB所示,第一电阻式数字模拟转换电路31b的输出端借由一第二开关S2选择性电性连接于第一取样电容Cl的第一端点P1,并且第一端点Pl又借由一第三开关S3选择性电性连接于一第一参考电压源13a,以接收一第一参考电压。 [0129] Another example is shown in FIG. IB, 31b of the output of the first resistive digital to analog converter circuit by means of a second switch S2 selectively electrically connected to the first terminal P1 of the first sampling capacitor Cl and the first end by means of a Pl and the third switch S3 is selectively electrically connected to a first reference voltage source 13a, for receiving a first reference voltage. 也就是说,可借由切换第二开关S2及第三开关S3,使第一取样电容Cl与第一参考电压源13a电性连接或是使第一取样电容Cl与第一电阻式数字模拟转换电路31b电性连接。 That is, by means of a second switch S2 and the third switch switches S3, the first sampling capacitor Cl and a first reference voltage source 13a is electrically connected to either the first sampling capacitor Cl and the first resistive digital to analog converter 31b is electrically connected to the circuit. [0130] 同理,第二可调式电压供应单元32a,其可以为一第二电阻式数字模拟转换电路32b,同样可以借由加权电阻式数字模拟转换器或R-2R梯形式数字模拟转换器来实现,第二电阻式数字模拟转换电路32b的电压输入端接收一第二上限电压及一第二下限电压,而第二电阻式数字模拟转换电路32b的输出电压的范围是介于第二上限电压及第二下限电压之间。 [0130] Similarly, a second adjustable voltage supply unit 32a, which may be a second resistive digital to analog conversion circuit 32b, may also be weighted by means of resistive digital to analog converter, or in the form of R-2R ladder DAC is achieved, the voltage input of the second resistive digital to analog converter circuit 32b receives a second voltage and a second upper limit voltage, the output voltage range 32b of the second resistive circuit is a digital to analog converter interposed between the second upper limit between the lower limit voltage and a second voltage.

[0131] 第二可调式电压供应单元32a的输入端(即控制端)电性连接于控制信号产生单元22的第三输出端03,以受控制信号的控制,并根据控制信号使得第二电阻式数字模拟转换电路32b输出一第二模拟电压。 [0131] The adjustable input of the second voltage supply unit 32a (i.e., control terminal) is electrically connected to a third output of the control signal generating unit 22 03, controlled by the control signals to, and in accordance with the control signal such that the second resistor digital-analog conversion circuit 32b outputs a second analog voltage.

[0132] 如图IA所示,第二取样电容C2,其具有:一第三端点P3以及一第四端点P4,其中第三端点P3电性连接于第二可调式电压供应单元32a的输出端,而第四端点P4则电性连接于电压比较单元21的第二输入端12。 [0132] As shown in FIG IA, a second sampling capacitor C2, which has: a third terminal P3 and a fourth terminal P4, wherein the third terminal P3 is electrically connected to the output of the second adjustable voltage supply unit 32a, and the second input of the fourth terminal P4 is electrically connected to the voltage comparing unit 21 and the end 12. 也就是说,第二取样电容C2电性连接于电压比较单元21的第二输入端12及第二可调式电压供应单元32a的输出端。 That is, the second sampling capacitor C2 is electrically connected to the second input 12 and an output terminal of the second voltage supply unit 32a adjustable voltage comparison unit 21.

[0133] 此外,请参阅图IB所示,第二电阻式数字模拟转换电路32b的输出端也可借由一第四开关S4选择性电性连接于第二取样电容C2的第三端点P3,并且第三端点P3又借由一第五开关S5选择性电性连接于一第二参考电压源13b,以接收一第二参考电压。 [0133] Further, as shown in FIG see the IB, a second resistive digital to analog converter circuit output terminal 32b can also be connected to the third terminal P3 of the second sampling capacitor C2 S4 by means of a fourth switch selectively electrically, and a third terminal P3 and S5 are connected by means of a fifth switch selectively electrically to a second reference voltage source 13b, to receive a second reference voltage. 也就是说,可借由切换第四开关S4及第五开关S5,使第二取样电容C2与第二参考电压源13b电性连接或是使第二取样电容C2与第二电阻式数字模拟转换电路32b电性连接。 That is, by means of the fourth switch S4 and the fifth switch S5 switches, the second sampling capacitor C2 and a second reference voltage source 13b is electrically connected to the second or a second sampling capacitor C2 and the resistive digital to analog converter 32b is electrically connected to the circuit.

[0134] 又如图IB所示,第一选择单元11包括:一第六开关S6以及一第七开关S7,而第二选择单元12包括一第八开关S8以及一第九开关S9。 [0134] Another example is shown in FIG. IB, the first selection unit 11 comprises: a sixth switch S6 and a seventh switch S7, the second selecting unit 12 includes an eighth switch S8 and a ninth switch S9. 其中,第六开关S6串接于电压比较单元21的第一输入端II,第七开关S7串接于第六开关S6,第七开关S7与第六开关S6之间具有一第一节点NI。 Wherein the sixth switch S6 is connected in series a first input terminal of the voltage comparing unit II 21, the seventh switch S7 connected in series to the sixth switch S6, a seventh switch having a first node NI and S7 between the sixth switch S6. 第八开关S8串接于电压比较单元21的第二输入端12,第九开关S9则串接于第八开关S8,并且在第九开关S9与第八开关S8之间具有一第二节点N2,而且待测电容40的一端电性连接于第一节点NI,而另一端则电性连接于第二节点N2。 The eighth switch S8 is connected in series the second input terminal of the voltage comparing unit 12, the ninth switch S9 21 is connected in series with the eighth switch S8, and having a second node N2 between the ninth switch S9 and the eighth switch S8 and one end of capacitor 40 is electrically connected to the test node the NI, the other end is electrically connected to the second node N2.

[0135] 如图IC所示,第一选择单元11及第二选择单元12也分别可以是一多工器可从多个待测电容40中选择某一待测电容40进行运作。 [0135] As shown in FIG IC, a first selection unit 11 and the second selecting unit 12, respectively, may be a multiplexer selecting one of the plurality of measured capacitance measured from the capacitor 4040 operate. 也就是说,当有多个待测电容40时,可借由多工器选择一欲量测或侦测的待测电容40与信号处理控制模块20电性连接。 That is, when there are a plurality of capacitor 40 is measured, can be selected to be a measurement or detection of the capacity to be measured by means of the multiplexer 40 is connected electrically to the signal processing control 20 module.

[0136] 此外,信号处理控制模块20还可以进一步包括至少一模拟信号处理电路23,其串联于第一开关SI与电压比较单元21之间,可用以滤除所接收到的信号中的杂讯,以提高电容感测的准确度。 [0136] In addition, the signal processing control module 20 may further comprise at least one analog signal processing circuit 23, which is connected in series between the first switch SI and the voltage comparison unit 21, it can be used to filter the received signal noise to improve the capacitive sensing accuracy. 模拟信号处理电路23包括:一模拟式滤波器23a及一可调程序化放大器23b,其中模拟式滤波器23a及可调程序化放大器23b彼此相互串接且串接顺序不受限制。 An analog signal processing circuit 23 comprises: an analog adjustable filter 23a and a programmable amplifier 23b, wherein the analog filters 23a and 23b connected in series adjustable programmable amplifier connected in series with each other and the order is not limited. 举例来说,模拟式滤波器23a的输入端可串接于第一开关SI,而其输出端又串接于可调程序化放大器23b的输入端,可调程序化放大器23b的输出端又串接于电压比较单元21,亦即可调程序化放大器23b电性连接于模拟式滤波器23a及电压比较单元21之间(串接顺序如图IC所示)。 For example, the analog input of the filter 23a may be connected in series to the first switch the SI, and its output in turn connected in series to the input terminal of the amplifier 23b of an adjustable program, the output of adjustable amplifier 23b, and a programmed sequence to the voltage comparing unit 21, i.e., the adjustable amplifier 23b is electrically connected to a programmable analog filter 23a and the voltage between the comparison unit 21 (FIG IC concatenated sequence shown). 或是,可调程序化放大器23b的输入端串接于第一开关SI,而其输出端则串接至模拟式滤波器23a的输入端,模拟式滤波器23a的输出端再分别串接至电压比较单元21的第一输入端Il及第二输入端12,使得模拟式滤波器23a串接于可调程序化放大器23b及电压比较单元21之间(图未示) Or, the adjustable programmable amplifier 23b is connected in series to the first input terminal of the SI switch, and its output is connected in series to the input terminal 23a of the analog filter, the output terminal 23a of analog filters are connected in series and then to a first input terminal of the voltage comparison unit and the second input terminal 21 Il 12, the analog filters connected in series with an adjustable program 23a 23b of amplifier 21 and the voltage between the comparison unit (not shown)

[0137] 如图IB所示,电容量测电路结构可进一步包括一控制模块50,其用以控制第一选择单元11及第二选择单元12,使待测电容40可以选择性地与第一输入端Il及第二输入端12电性连接,并且控制模块50又控制第一开关SI、第二开关S2、第三开关S3、第四开关S4及第五开关S5,以使得电容量测电路结构可在充电阶段及电荷转移阶段间进行切换。 [0137] As shown in FIG the IB, the capacitance sensing circuit may further comprise a configuration control module 50, which means 11 for controlling the first selection and the second selection unit 12, so that the capacitor 40 can be measured selectively with the first Il electrical input terminals 12 and a second input terminal, and the control module controls the first switch 50 and the SI, the second switch S2, the third switches S3, fourth switch S4 and the fifth switch S5, so that the capacitance sensing circuit structure can be switched between the charge phase and the charge transfer stage.

[0138] 如图2A所示,在充电阶段时,控制模块50使第一开关SI、第三开关S3、第五开关S5、第七开关S7及第九开关S9处于“0N”的状态,且使第二开关S2、第四开关S4、第六开关S6及第八开关S8处于“OFF”的状态,借此使待测电容40与信号处理控制模块20及电荷转移模块30(请同时参阅图1A)隔离,并使得待测电容40的两端与两电压源13电性连接,以通过电压源13使待测电容40充电。 [0138] FIG 2A, in the charging phase, the control module 50 switches the SI of the first, the third switches S3, the fifth switch S5, the seventh switch S7 and the ninth switch S9 is in the state "0N", and the second switch S2, the fourth switch S4, the sixth switch S6 and the eighth switch S8 is in the "OFF" state, the capacitor 40 is measured whereby the signal processing module 20 and the charge transfer control module 30 (also refer to FIG. 1A) isolated and measured across the capacitor 40 so that the two voltage source 13 is electrically connected to the capacitor 13 so that test 40 is charged by the voltage source. 于此同时,电荷转移模块30也与信号处理控制模块20隔离,并借由第一参考电压源13a及第二参考电压源13b分别对第一取样电容Cl及第二取样电容C2充电。 Meanwhile, charge transfer module 30 is also isolated from the signal processing control module 20, respectively, and a first sampling capacitor Cl and the second sampling capacitor C2 is charged by means of a first reference voltage source 13a and the second reference voltage source 13b.

[0139] 接着,如图2B所示,在电荷转移阶段,控制模块50使第二开关S2、第四开关S4、第六开关S6及第八开关S8处于“0N”的状态,且使第一开关SI、第三开关S3、第五开关S5、第七开关S7及第九开关S9处于“OFF”的状态。 [0139] Next, as shown in FIG charge transfer phase, the control module 2B 50 of the second switch S2, the fourth switch S4, the sixth switch S6 and the eighth switch S8 is in state "0N", and the first switch SI, the third switches S3, the fifth switch S5, the seventh switch S7 and the ninth switch S9 is "OFF" state of. 此时,待测电容40、第一取样电容Cl及第二取样电容C2形成一电容分压回路,而第一可调式电压供应单元31a及第二可调式电压供应单元32a则受控制信号产生单元22的控制对此电容分压回路偏压,以调整第一取样电容Cl及第二取样电容C2上的偏压,进而使待测电容40上的电荷转移至第一取样电容Cl及第二取样电容C2。 At this time, the capacitor 40 to be measured, a first sampling capacitor Cl and a second sampling capacitor C2 form a capacitor voltage dividing circuit, and a first adjustable voltage supply unit 31a and a second adjustable voltage supply unit 32a is receiving the control signal generating unit 22, this control loop bias voltage dividing capacitors, to adjust the first sampling capacitor Cl and the bias on the second sampling capacitor C2, thereby enabling the measured capacitor 40 of the charge transfer capacitor to the first sampling and the second sampling Cl capacitor C2.

[0140] 由于第一输入端Il及第二输入端12间之电差压即为待测电容40两端的电压差,因此当电压比较单元21所输出的电压比较信号不为零电位,则表示待测电容40两端间仍存在有电压差时,即代表着待测电容40上的电荷尚未完全转移至第一取样电容Cl及第二取样电容C2,所以控制信号产生单元22所输出的控制信号仍会调整第一可调式电压供应单元31a及第二可调式电压供应单元32a所产生的电压值,进而调整待测电容40两端的电压差,以达到电容侦测的目的。 [0140] Since the first input terminal Il and the second input terminal 12 of the differential pressure is the electrical capacitance measured across the voltage difference 40, so that when the voltage comparator output signal is a voltage comparison unit 21 is not zero potential, then measured between both ends of capacitor 40 still has a voltage difference, which represents the charge on the capacitor 40 to be measured has not been fully transferred to the first sampling capacitor Cl and a second sampling capacitor C2, the control signal generating unit 22 outputs a control signal 31a will adjust the first adjustable unit and a voltage value of the supply voltage 32a generated by a second adjustable voltage supply unit, thereby adjusting the voltage 40 measured across the capacitance difference, to achieve the purpose of detecting capacitance.

[0141] 因此,可通过调整第一可调式电压供应单元31a及第二可调式电压供应单元32a的输出电压,以改变待测电容40两端的电位差,而直到待测电容40两端的电位差为零或趋近零时,待测电容40的电容值可根据下列公式计算: [0141] Thus, by adjusting a first adjustable voltage supply unit 31a and the output voltage of the second voltage supply unit 32a adjustable to vary the measured potential difference across the capacitor 40, and until the potential difference across the capacitor 40 to be measured zero or approaches zero, the capacitance value of the capacitor 40 may be measured according to the following formula:

[0142] Cx = [ (Ca*Cb) / (V3-V4) ] * [ (Vp-Vq) / (Ca+Cb)] [0142] Cx = [(Ca * Cb) / (V3-V4)] * [(Vp-Vq) / (Ca + Cb)]

[0143] 其中,Cx为待测电容40的电容值;Ca及Cb分别为第一取样电容Cl及第二取样电容C2的电容值;V3及V4分别为待测电容40两端两电压源13的电压值;以及Vp及Vq分别为第一端点Pl及第三端点P3的电压值(即第一可调式电压供应单元31a及第二可调式电压供应单元32a的输出电压值)。 [0143] wherein, Cx is the capacitance of capacitor 40 is measured; each of Ca and Cb is the capacitance of the first capacitor Cl, and a second sampling capacitor C2 of sampling; V3 and V4 are measured at both ends of two capacitors 40 voltage source 13 voltage value; Vp and Vq, respectively, and a first terminal and a voltage value of the third terminal Pl and P3 (i.e., a first adjustable voltage supply unit 31a and the second adjustable output voltage value of the voltage supply unit 32a).

[0144] 如图3所示,并请同时参阅图1A,在充电阶段,控制模块50使第一开关SI、第三开关S3、第五开关S5、第七开关S7及第九开关S9处于“0N”的状态,控制信号产生单元22即受起始信号STAR的控制,并且在进入电荷转移阶段时,控制模块50使第二开关S2、第四开关S4、第六开关S6、第八开关S8处于“ON”的状态,控制信号产生单元22受到时脉信号CLK及电压比较单元21输出的电压比较信号的控制,以适时地改变其控制信号并使得第一可调式电压供应单元31a及第二可调式电压供应单元32a输出特定的电压。 [0144] 3, and Referring also to Figure 1A, the charging phase, the control module 50 switches the SI of the first, the third switches S3, the fifth switch S5, and the seventh switch S7 is in the ninth switch S9 " when 0N "state, i.e. the control signal generating unit 22 is controlled by a start signal STAR and entering the charge transfer phase, the control module 50 of the second switch S2, the fourth switch S4, the sixth switch S6, the eighth switch S8 in the "ON" state, the control signal generating unit 22 is controlled by the voltage comparator output signal when the clock signal CLK and a voltage comparison unit 21, so as to timely change the control signal and such that a first adjustable voltage supply unit 31a and the second adjustable voltage supply unit 32a outputs a specific voltage.

[0145] 如图4所示,也请同时参阅图1A,当以逐次逼近型模拟数字转换器作为控制信号产生单元22时,控制信号产生单元22可逐次调整输出的控制信号,以调整第一可调式电压供应单元31a及第二可调式电压供应单元32a产生的电压,进而调节第一输入端11及第二输入端12所接收到的电压差,并借此使电压比较信号在第N+1周期时较第N周期时更趋近于一特定值,其中特定值可以为零电位或一极趋近于零的电位。 [0145] 4, please also refer to Figure 1A, when a successive approximation analog to digital converter as the control signal generating unit 22, a control signal generating unit 22 may adjust the control signal outputted sequentially, to adjust the first voltage adjustable voltage supply unit 31a and a second adjustable voltage supply unit (32a), thereby adjusting the voltage difference between the first input terminal 11 and the second input 12 received, and the comparison signal whereby the voltage at the N + when a period of more close to a particular value than the first N cycles, wherein the specific value may be a zero potential or a potential of the electrode close to zero.

[0146]【第二实施例】 [0146] [Second Embodiment]

[0147] 图5A是本发明第二实施例的一种具有电荷转移电路的多工电容量测电路结构的示意图。 [0147] FIG 5A is a schematic diagram of a second embodiment of the present invention, multi-capacitance sensing circuit having a configuration of a charge transfer circuit. 图5B是本发明第二实施例的另一实施形态的具有电荷转移电路的多工电容量测电路结构的示意图。 FIG. 5B is a schematic diagram multi capacitance sensing circuit having a charge transfer circuit configuration of another embodiment of the second embodiment of the present invention. 图5C是本发明第二实施例又一实施形态的具有电荷转移电路的多工电容量测电路结构的示意图。 5C is a schematic view of a multi-station configuration of a capacitance sensing circuit having a charge transfer circuit of the second embodiment of the present invention of another embodiment. 图6是本发明第二实施例再一实施形态的具有电荷转移电路的多工电容量测电路结构的示意图。 FIG 6 is a schematic view of a multi-station configuration of a capacitance sensing circuit having a charge transfer circuit of the second embodiment of another embodiment of the present invention.

[0148] 如图5A所不,本发明第二实施例为一种具有电荷转移电路的多工电容量测电路结构,其包括:一第一选择模块10' ;一初级信号处理模块60 ;以及至少一次级信号处理模块70。 The capacitance sensing circuit configuration [0148] FIG. 5A does not, a second embodiment of the present invention is a charge transfer circuit having a multi-station, comprising: a first selection module 10 '; a primary signal processing module 60; and at least one secondary signal processing module 70. 本实施例的多工电容量测电路结构,是用管道电路(pipeline circuit)以多工方式侦测至少一待测电容40的电容值大小或电容值的变化。 Multi capacitance sensing circuit structure of the present embodiment, a pipe circuit (pipeline circuit) in a multiplex manner to detect changes in capacitance value of the size of the capacitor 40 or the capacitance value of the at least one test. 且本实施例利用串接多个信号处理模块60、70,可加快侦测待测电容40电容值的速度,并使得单位时间内侦测的电容值数目增加。 And the present embodiment utilizes a plurality of cascaded signal processing modules 60 and 70, 40 can detect the speed of the capacitance value of the capacitance to be measured, and that the number of detected capacitance value per unit time is increased.

[0149] 第一选择模块10',其功能、作用方式及产生的结果或功效,与第一实施例中选择模块各实施形态相同,第一选择模块10'包括:一第一选择单元11及一第二选择单元12,其中待测电容40电性连接于第一选择单元11及第二选择单元12之间,而第一选择单元11及第二选择单元12的一端同样分别与两电压源13电性连接。 [0149] The first selection module 10 ', its function, and mode of action or produce a result of efficacy, selecting the first embodiment forms each of the embodiments the same module, a first selection module 10' includes: a first selecting unit 11 and a second selection unit 12, wherein the measured capacitor 40 is electrically connected between the first selection unit 12 and the second selecting means 11, and one end of the first selection unit 11 and the second selecting unit 12 is also two voltage sources, respectively 13 is electrically connected. 待测电容40可借由切换第一选择单元11及第二选择单元12与两电压源13电性连接,并通过两电压源13使待测电容40充电。 Capacitor 40 can be measured by means of the switching unit 11 and the first selection unit 12 and two second selection voltage source 13 is electrically connected, and that the two measured capacitor 40 is charged by the voltage source 13. 待测电容40又可借由第一选择单元11及第二选择单元12电性连接于初级信号处理模块60,因此可通过切换第一选择单元11及第二选择单元12使待测电容40与初级信号处理模块60电性连接。 Capacitor 40 connected in turn to be measured by means of the first selection means 11 and 12 are electrically second selecting unit to the primary signal processing module 60, it is possible that the capacity to be measured by switching the first selection unit 11 and the second selecting means 12 and 40 a primary signal processing module 60 is electrically connected.

[0150] 初级信号处理模块60,其包括:一初级信号处理控制模块61 ;以及一初级电荷转移模块30'。 [0150] primary signal processing module 60, which comprises: a primary control signal processing module 61; and a primary charge transfer modules 30 '.

[0151] 初级信号处理控制模块61,其功能、作用方式及产生的结果或功效,与第一实施例中信号处理控制模块各实施形态相同。 [0151] Primary control signal processing module 61, the function, mode of action and efficacy or results produced, in the first embodiment controls the signal processing module according to each of the same form. 初级信号处理控制模块61的输入端与第一选择单元11及第二选择单元12电性连接,且初级信号处理模块60的输出端用以输出一初级控制信号。 12 primary electrical control signal processing module 61 and the input terminal of the first selection unit 11 and the second selecting means connected to the signal output terminal and the primary processing module 60 for outputting a primary control signal. 初级信号处理控制模块61又包括:一初级电压比较单兀61a ;—第一开关SI ;以及一初级控制信号产生单元61b。 A primary signal processing and control module 61 comprises: a primary voltage comparing unit Wu 61a; - a first switch the SI; and a primary control signal generating unit 61b.

[0152] 初级电压比较单兀61a,其具有:一第一输入端Il ;一第二输入端12 ;以及一第一输出端01。 [0152] Wu primary voltage comparing unit 61a, having: a first input terminal Il; a second input terminal 12; and a first output terminal 01. 其中,第一输入端Il电性连接于第一选择单兀11的一端,而第二输入端12也电性连接于第二选择单元12的一端,因此使得待测电容40可通过第一选择单元11及第二选择单元12与初级电压比较单元61a的第一输入端Il及第二输入端12电性连接,进而比较待测电容40两端的电压,再由第一输出端Ol据此输出一第一电压比较信号。 Wherein a first input terminal Il is electrically connected to the first end 11 of Wu selection unit, and 12 is also electrically connected to a second input of the second selection unit 12 at one end, so that the capacitor 40 can be measured by the first selection Il a first input terminal 12 and the primary voltage comparing unit 61a and the second unit 11 and selection unit 12 is electrically connected to a second input terminal, and then comparing the voltage 40 measured across the capacitor, whereby then outputted from a first output terminal Ol a first voltage comparison signal. [0153] 第一开关SI,其电性连接于初级电压比较单元61a的第一输入端11及第二输入端12之间,当第一开关SI为“0N”时,即使得第一输入端Il及第二输入端12短路,借此消除电路中的偏移电位。 Between 12, when the first switch SI is "0N", even have a first input terminal of [0153] a first switch SI, which is electrically connected to the primary voltage comparison unit 61a of the first input terminal and a second input terminal 11 Il a second input terminal 12 and a short circuit, thereby eliminating the offset voltage in the circuit.

[0154] 初级控制信号产生单元61b,其可以为一快闪式(Flash)模拟数字转换器或一逐次逼近型(SAR)模拟数字转换器,其具有:一第三输入端13 ;以及一第二输出端02及一第三输出端03。 [0154] Primary control signal generating unit 61b, which may be a flash (Flash) analog-digital converter or a successive approximation (SAR) analog to digital converter, comprising: a third input terminal 13; and a second second output terminal 02 and a third output terminal 03. 其中,第三输入端13电性连接于初级电压比较单元61a的第一输出端01,并用以接收第一电压比较信号,而第二输出端02及第三输出端03,则用以分别输出初级控制信号,该初级控制信号为一数字信号。 Wherein the third input terminal 13 is electrically connected to the primary voltage comparison unit 61a of the first output terminal 01, and for receiving the first comparison signal voltage, a second output terminal 02 and the third output terminal 03, respectively, to the output primary control signal, the primary control signal is a digital signal.

[0155] 如图5C所示,初级信号处理控制模块61又进一步包括至少一第一模拟信号处理电路62,其串联于第一开关SI与初级电压比较单元61a之间,用以滤除信号中的杂讯,可提升感测待测电容40两端电压的准确度。 [0155] 5C, the primary control signal processing module 61 further comprises at least a first analog signal processing circuit 62, which is connected in series between the first switch SI to the primary voltage comparison unit 61a, for filtering the signal the noise, can improve the sensing accuracy of the measured capacitance voltage across 40.

[0156] 第一模拟信号处理电路62包括:一第一模拟式滤波器62a ;以及一第一可调程序化放大器62b,其中第一模拟式滤波器62a及第一可调程序化放大器62b彼此相互串接且串接顺序不受限制。 [0156] The first analog signal processing circuit 62 comprises: a first analog filter 62a; and a first adjustable programmable amplifier 62b, wherein the first filter 62a and the first analogue programmable variable amplifier 62b to one another and sequentially connected with each other in series is not limited. 举例来说,第一模拟式滤波器62a的输入端可串接于第一开关SI,而其输出端又串接于第一可调程序化放大器62b的输入端,第一可调程序化放大器62b的输出端又串接于初级电压比较单元61a,亦即第一可调程序化放大器62b电性连接于第一模拟式滤波器62a及初级电压比较单元61a之间(串接顺序如图5C所示)。 For example, the analog input of the first filter 62a may be connected in series to the first switch the SI, and its output in turn connected in series to the first input of the adjustable programmable amplifier 62b, the first adjustable programmable amplifier and the output terminal 62b is connected in series with the primary voltage comparison unit 61a, i.e., a first adjustable amplifier 62b is electrically connected to a programmable analog filter between the first 62a and the primary voltage comparison unit 61a (FIG. 5C sequentially concatenated shown). 或是,第一可调程序化放大器62b的输入端串接于第一开关SI,而其输出端则串接至第一模拟式滤波器62a的输入端,第一模拟式滤波器62a的输出端再分别串接至第一初级电压比较单元61a的第一输入端Il及第二输入端12,使得第一模拟式滤波器62a串接于第一可调程序化放大器62b及初级电压比较单元61a之间(图未示)。 Or, the adjustable input of the first programmable amplifier 62b is connected in series with the first switch the SI, and its output is connected in series to the first input terminal 62a of the analog filter, a first analog output filter 62a, then connected in series respectively to the first end of the primary voltage comparing unit 61a of the first input terminal Il and the second input terminal 12, such that the first analog filter 62a connected in series to the first variable amplifier 62b and the primary programming voltage comparing unit between 61a (not shown).

[0157] 请再参阅图5A所示,初级电荷转移模块30',其功能、作用方式及产生的结果或功效,与第一实施例中电荷转移模块各实施形态相同。 [0157] Please refer to FIG. 5A, the primary charge transfer module 30 ', its function, mode of action and efficacy or results produced, in the first embodiment, each of the charge transfer modules same shape. 初级电荷转移模块30'包括:一第一电荷转移电路31 ;以及一第二电荷转移电路32。 Primary charge transfer module 30 'comprises: a first charge transfer circuit 31; and a second charge transfer circuit 32. 其中,初级电荷转移模块30'的输入端接收初级控制信号,其输出端电性连接于初级信号处理控制模块61的输入端。 Wherein the primary charge transfer module 30 'receives a primary control signal input terminal, an output terminal electrically connected to the control input of the primary signal processing module 61. 第一电荷转移电路31,其包括:一第一可调式电压供应单兀31a ;以及一第一取样电容Cl,而第二电荷转移电路32,其包括:一第二可调式电压供应单元32a ;以及一第二取样电容C2。 A first charge transfer circuit 31, comprising: a first adjustable voltage supply single Wu 31a; and a first sampling capacitor Cl, and the second charge transfer circuit 32, comprising: a second adjustable voltage supply unit 32a; and a second sampling capacitor C2.

[0158] 第一可调式电压供应单元31a,其输入端电性连接于初级控制信号产生单元61b的第二输出端02,并用以接收初级控制信号。 The second output [0158] a first adjustable voltage supply unit 31a, an input terminal electrically connected to the primary control signal generation unit 61b of the terminal 02, and for receiving a primary control signal. 此外,请同时参阅图5B所示,第一可调式电压供应单元31a可以是一第一电阻式数字模拟转换电路31b,例如可以是加权电阻式数字模拟转换器或R-2R梯形式数字模拟转换器。 In addition, please also refer to FIG. 5B, a first adjustable voltage supply unit a first resistor 31a may be a digital-analog conversion circuit 31b, for example, may be a weighted resistive digital to analog converter, or in the form of R-2R ladder DAC device.

[0159] 再者,第一电阻式数字模拟转换电路31b的电压输入端能接收一第一上限电压及一第一下限电压,使第一电阻式数字模拟转换电路31b的输出电压范围介于第一上限电压及第一下限电压之间,而第一电阻式数字模拟转换电路31b的控制端(即输入端)电性连接于第二输出端02以受初级控制信号控制,并根据初级控制信号控制使第一电阻式数字模拟转换电路31b输出一第一模拟电压。 [0159] Further, the voltage input of the first resistive digital to analog converter circuit 31b can receive a first upper voltage and a first lower limit voltage, the resistance of the first digital to analog converter circuit 31b of the output voltage range between a first lower limit voltage and upper limit voltage, and the first resistive digital to analog converter circuit 31b of the control terminal (i.e., input) is electrically connected to the second output terminal 02 to a primary control signal by a primary control signal, and in accordance with controlling the first resistive digital to analog converter circuit 31b outputs a first analog voltage.

[0160] 如图5A及图5B所不,第一取样电容Cl,其具有:一第一端点Pl ;以及一第二端点P2。 [0160] FIG. 5A and 5B do not, the first sampling capacitor Cl, having: a first terminal Pl is; and a second node P2. 第一端点Pl电性连接于第一可调式电压供应单元31a的输出端,而第二端点P2则电性连接于第一输入端II。 A first terminal Pl is electrically connected to the first output terminal of the adjustable voltage supply unit 31a and the second terminal P2 is electrically connected to the first input terminal II. 又请参阅图5B所示,第一电阻式数字模拟转换电路31b的输出端可借由第二开关S2选择性电性连接于第一端点Pl,第一端点Pl又可再借由一第三开关S3选择性电性连接于一第一参考电压源13a,以接收一第一参考电压。 Reference is also made to FIG. 5B, 31b of the output of the first resistive digital to analog converter circuit may be connected to the first terminal Pl selectively electrically by means of a second switch S2, a first terminal can be subdivided by means of a Pl the third switch S3 is selectively electrically connected to a first reference voltage source 13a, for receiving a first reference voltage.

[0161] 第二可调式电压供应单元32a,其控制端(即输入端)电性连接于第三输出端03用以接收初级控制信号。 [0161] 32a, a control terminal of the second adjustable voltage supply unit (i.e., input) is electrically connected to the third output terminal 03 for receiving a primary control signal. 又请参阅图5B所示,第二可调式电压供应单元32a可以为一第二电阻式数字模拟转换电路32b,也同样可通过加权电阻式数字模拟转换器或R-2R梯形式数字模拟转换器来实现。 Reference is also shown in FIG. 5B, the second adjustable voltage supply unit 32a may be a second resistive digital to analog conversion circuit 32b, also be weighted by a resistive digital to analog converter, or in the form of R-2R ladder DAC to fulfill.

[0162] 第二电阻式数字模拟转换电路32b电压输入端能接收一第二上限电压及一第二下限电压,使得输出电压范围介于第二上限电压及第二下限电压之间,并且第二电阻式数字模拟转换电路32b的控制端(即输入端)电性连接于第三输出端03以受初级控制信号控制,以使第二电阻式数字模拟转换电路32b输出一第二模拟电压。 [0162] The second resistive voltage digital to analog converter circuit 32b to receive a second input voltage, and a second upper limit voltage, the output voltage range between the upper limit of the second voltage and the second voltage is between the lower limit and the second resistive digital to analog converter circuit 32b of the control terminal (i.e., input) is electrically connected to the third output terminal 03 by the primary control signal, so that the second resistive digital to analog converter circuit 32b outputs a second analog voltage.

[0163] 如图5A及图5B所示,第二取样电容C2,其具有:一第三端点P3 ;以及一第四端点P4。 [0163] FIG 5A and FIG 5B, the second sampling capacitor C2, which has: a third terminal P3; and a fourth terminal P4. 第三端点P3电性连接于第二可调式电压供应单元32a的输出端,而第四端点P4则电性连接于第二输入端12。 The third terminal P3 is electrically connected to the output of the second adjustable voltage supply unit 32a, and a fourth terminal P4 is electrically connected to the second input 12. 此外,请参阅图5B所示,第二电阻式数字模拟转换电路32b的输出端同样借由第四开关S4选择性电性连接于第三端点P3,并且第三端点P3再借由第五开关S5选择性电性连接于一第二参考电压源13b,以接收一第二参考电压。 Also, see FIG. 5B, 32b of the output of the second digital to analog converter circuit resistance likewise the fifth switch by means of the fourth switch S4 is selectively electrically connected to the third terminal P3, and then by means of the third endpoint P3 S5 selectively electrically connected to a second reference voltage source 13b, to receive a second reference voltage.

[0164] 如图5B所示,第一选择单元11包括:一第六开关S6 ;以及一第七开关S7,而第二选择单元12包括:一第八开关S8 ;以及一第九开关S9。 As shown in [0164] FIG. 5B, the first selection unit 11 comprises: a sixth switch S6; and a seventh switch S7, the second selecting unit 12 includes: an eighth switch S8; and a ninth switch S9. 第六开关S6串接于初级电压比较单元61a的第一输入端II,第七开关S7则串接于第六开关S6并电性连接至电压源13,此外第六开关S6及第七开关S7之间具有一第一节点NI。 The sixth switch S6 in series with the primary voltage comparing unit 61a of the first input terminal II, the seventh switch S7 are connected in series and the sixth switch S6 is electrically connected to a voltage source 13, in addition to the sixth switch S6 and the seventh switch S7 having a first node between the NI. 同理,第八开关S8串接于初级电压比较单元61a的第二输入端12,第九开关S9则串接于第八开关S8并与电压源13电性连接(请参阅图5A),第八开关S8及第九开关S9之间同样形成一第二节点N2,因此待测电容40的一端电性连接于第一节点NI,而另一端则电性连接于第二节点N2。 Similarly, in series with the eighth switch S8 primary voltage comparing unit 61a of the second input terminal 12, the ninth switch S9 is connected in series with the eighth switch S8 is electrically connected to a voltage source 13 (see FIG. 5A), the first eight switch is also formed between the second node N2 and a ninth switch S8 and S9, and therefore one end electrically connected to the capacitor 40 is measured first node NI, the other end is electrically connected to the second node N2.

[0165] 再者,请参阅图5C所示,第一选择单元11及第二选择单元12可分别为一多工器,以选择性电性连接于待测电容40。 [0165] In addition, please refer to FIG 5C, the first selection unit 11 and the second selection unit 12 may be a multiplexer, respectively, to selectively electrically connect the capacitor 40 to be measured. 亦即,当有多个待测电容40时,可借由多工器使欲量测或侦测的待测电容40与初级电压比较单元61a的第一输入端Il及第二输入端12电性连接。 That is, when there are a plurality of capacitor 40 is measured, so that by means of the multiplexer can be measured or detected to be tested a first input terminal of capacitor 12 is electrically Il comparison unit 40 with the primary voltage and a second input terminal 61a connection.

[0166] 如图5A所不,次级信号处理模块70,其包括:一第二选择模块10”;一次级信号处理控制模块71 ;以及一次级电荷转移模块30”。 [0166] FIG. 5A does not, the secondary signal processing module 70, which comprises: a second selection module 10 "; a secondary control signal processing module 71; and a secondary charge transfer modules 30."

[0167] 多工电容量测电路借由初级信号处理模块60与至少一个次级信号处理模块70串接的方式,以达到快速侦测待测电容40的电容值的目的。 [0167] Multi-capacitance sensing circuit by means of a primary signal processing module 60 and at least one secondary signal processing module 70 series manner, in order to achieve rapid detection of the capacitance value of the capacitor 40 is measured. 因此,每一次级信号处理模块70依序彼此串接,多个次级信号处理模块70中第一级的次级信号处理模块70串接于初级信号处理模块60,而第二级的次级信号处理模块70再串接于第一级的次级信号处理模块70,串接的数量可依照使用者的需求而改变。 Thus, each secondary signal processing module 70 are sequentially connected in series to each other, a plurality of secondary signal processing module 70 of the first stage 70 of the secondary signal processing module in series with the primary signal processing module 60, and a second stage secondary the signal processing module 70 connected in series to the first stage and then the secondary signal processing module 70, the number of series may be changed in accordance with user needs.

[0168] 如图5A所示,第二选择模块10”包括:一第三选择单元14及一第四选择单元15。其中,第三选择单元14及第四选择单元15之间电性连接有一转移电容41,且同样是通过切换第三选择单元14及第四选择单元15以对转移电容41进行充电或电荷转移的动作。 [0168] As shown in FIG. 5A, the second selection module 10 "includes: a selection unit 14, a third and a fourth selection unit 15. wherein the third selection means 14 and the fourth selection means 15 is electrically connected between a transfer capacitor 41, and the operation of the same is 15 to capacitor 41 to charge or transfer charge transfer through the switching unit 14 selecting the third and the fourth selection means.

[0169] 其中,第二选择模块10”的输入端电性连接于前一级的初级信号处理控制模块61的输入端11、12或前一级的次级信号处理控制模块71的输入端(如图6所示)。更具体的说明,第一级的次级信号处理模块70中,第三选择单元14电性连接于第一选择单元11的一端,以与初级信号处理控制模块61的第一输入端Il电性连接,而第四选择单兀15则电性连接于第二选择单元12的一端,以与初级信号处理控制模块61的第二输入端12电性连接。第二级或以上的次级信号处理模块70中,其第三选择单元14电性连接于前一级的次级信号处理模块70的第三选择单元14,而第四选择单元15则电性连接于前一级的次级信号处理模块70的第四选择单元15。 [0169] wherein, 10 'of the second input terminal electrically connected to the preceding stage selection module of the control input of the primary signal processing module 11, 12 or 61 of the preceding stage of the input terminal (the secondary signal processing module 71 of the control As shown in FIG. 6). more specifically described, the first stage of the secondary signal processing module 70, a third selection unit 14 is electrically connected to one end of the first selection unit 11, with the primary signal processing control module 61 the first input terminal Il is electrically connected, and a fourth selection unit 15 Wu electrically connected to one end of the second selection means 12, to a second input 12 electrically with the primary signal processing control module 61 is connected to an end. the second stage or more secondary signal processing module 70, 14 which are electrically connected to the third selection means before a secondary signal processing module 70 of the third selection means 14, 15 and the fourth selection means electrically connected to the front a secondary signal processing module 70 to a fourth selecting unit 15.

[0170] 每一次级信号处理控制模块71包括:一次级电压比较单元71a ;—第十开关SlO ;以及一次级控制信号产生单元7 1b。 [0170] Each secondary control signal processing module 71 comprises: a secondary voltage comparison unit 71a; - tenth switch SlO; and a level control signal generating unit 7 1b. 其中,次级信号处理控制模块71的输入端与第二选择模块10”电性连接,且其输出端可输出一次级控制信号。 Wherein the secondary signal processing control module input 71 and the second selection module 10 'is electrically connected, and an output terminal can output a level control signal.

[0171] 次级电压比较单元71a,其具有:一第四输入端14 ;一第五输入端15 ;以及一第四输出端04。 [0171] The secondary voltage comparison unit 71a, which has: a fourth input terminal 14; a fifth input terminal 15; and a fourth output terminal 04. 第四输入端14串联于第三选择单元14的一端,而第五输入端15则串联于第四选择单元15的另一端,也因此转移电容41可借由第四输入端14及第五输入端15,与次级电压比较单元71a电性连接,进而比较转移电容41两端的电压,再通过第四输出端04据此输出一第二电压比较信号。 A fourth input 14 connected in series to one end of the third selection unit 14, and the fifth input terminal 15 connected in series to the other end of the fourth selection unit 15, thus transferring capacitance 14 and the fifth input 41 may be by means of a fourth input terminal 15, the secondary voltage terminal 71a electrically connected to the comparison unit, and further 41 comparative transfer voltage across the capacitor, whereby then the second voltage comparator outputs a signal via the fourth output terminal 04.

[0172] 第十开关S10,其电性连接于第四输入端14及第五输入端15之间,当第十开关SlO为“0N”时,即使得第四输入端14及第五输入端15短路,以借此消除电路中的偏移电位。 [0172] SlO tenth switch, is electrically connected between the fourth input terminal 14 and the fifth input terminal 15, when the tenth switch SlO is "0N", even if the fifth input terminal 14, and have a fourth input terminal 15 short-circuited, to thereby cancel the offset voltage in the circuit.

[0173] 次级控制信号产生单元71b,可以是一快闪式(Flash)模拟数字转换器或一逐次逼近型(SAR)模拟数字转换器。 [0173] the secondary control signal generating unit 71b, may be a flash (Flash) analog-digital converter or a successive approximation (SAR) analog to digital converter. 次级控制信号产生单元71b具有:一第六输入端16 ;以及一第五输出端05及一第六输出端06。 The secondary control signal generation unit 71b has: a sixth input terminal 16; and a fifth and a sixth output terminal 05 output terminal 06. 第六输入端16电性连接于第四输出端04以接收第二电压比较信号,而第五输出端05及第六输出端06则用以分别输出次级控制信号,该次级控制信号为数字信号。 A sixth input terminal 16 is electrically connected to the fourth output terminal of the second voltage comparator 04 to receive the signal, and a fifth and a sixth output terminal 05 to output terminal 06 outputs the secondary control signal, the secondary control signal which is Digital signal.

[0174] 同理,如图5C所示,次级信号处理控制模块71同样可进一步包括至少一第二模拟信号处理电路72,第二模拟信号处理电路72可串联于第十开关SlO与次级电压比较单元71a之间,用以滤除信号中的杂讯,以提升转移电容41两端所测得的电压准确度。 [0174] Similarly, FIG. 5C, the secondary signal processing control module 71 may further comprise at least one same second analog signal processing circuit 72, a second analog signal processing circuit 72 may be connected in series with the secondary tenth switch SlO between the voltage comparison unit 71a, for filtering signal noise, to enhance the transfer of the measured capacitance voltage accuracy ends 41.

[0175] 第二模拟信号处理电路72包括:一第二模拟式滤波器72a ;以及一第二可调程序化放大器72b,其中第二模拟式滤波器72a及一第二可调程序化放大器72b彼此相互串接且串接顺序不受限制。 [0175] The second analog signal processing circuit 72 comprises: a second analog filters 72a; and a second adjustable programmable amplifier 72b, wherein the second analog filters 72a and a second adjustable programmable amplifier 72b and sequentially concatenated in series to each other is not limited. 举例来说,第二模拟式滤波器72a的输入端可串接于第十开关S10,而其输出端则电性连接至第二可调程序化放大器72b的输入端,亦即第二可调程序化放大器72b电性连接于第二模拟式滤波器72a及次级电压比较单元71a之间(图未示)。 For example, the input of the second analog filter 72a may be connected in series tenth switch SlO, and its output terminal is electrically connected to the second input of the adjustable programmable amplifier 72b, the second adjustable i.e. 72b is electrically connected to the second programmable amplifier 72a and analog filter between the secondary voltage comparison unit 71a (not shown). 或是,第二可调程序化放大器72b的输入端可串接于第十开关S10,而其输出端则电性连接至第二模拟式滤波器72a的输入端,第二模拟式滤波器72a的输出端再分别电性连接至次级电压比较单元71a,使得第二模拟式滤波器72a电性连接于第二可调程序化放大器72b及次级电压比较单元71a之间(串接顺序如图5C所示)。 Or, the second input of the adjustable programmable amplifier 72b may be connected in series tenth switch SlO, and its output terminal is electrically connected to the input of a second analog filter 72a, a second analog filter 72a then the output terminal are electrically connected to the secondary voltage comparison unit 71a, such that the second analog filter 72a is electrically connected to the second variable amplifier 72b and a secondary programming voltage comparison unit (such as 71a connected in series between the sequence FIG. 5C).

[0176] 次级电荷转移模块30”的输入端接收前一级输出的初级控制信号(如图5A所示)或前一级输出的次级控制信号(如图6所示),次级电荷转移模块30”的输出端电性连接于次级信号处理控制模块71的输入端。 A primary control signal output prior to receiving the [0176] secondary charge transfer modules 30 "of the secondary control signal input terminal or an output from the front (FIG. 5A) (FIG. 6), the secondary charge the output terminal of the transfer module 30 "is connected to the control input of the secondary signal processing module 71.

[0177] 第一级的次级电荷转移模块30”,其包括:一第三电荷转移电路33 ;以及一第四电荷转移电路34。第三电荷转移电路33,其包括:一第三可调式电压供应单元33a ;以及第三取样电容C3,而第四电荷转移电路34,其也包括:一第四可调式电压供应单元34a ;以及一第四取样电容C4。 [0177] The secondary charge transfer stage of the first module 30 ", comprising: a third charge transfer circuit 33; and a fourth charge transfer circuit 34. The third charge transfer circuit 33, comprising: a third adjustable voltage supply unit 33a; and a third sampling capacitor C3, and the fourth charge transfer circuit 34, which also includes: a fourth adjustable voltage supply unit 34a; and a fourth sampling capacitor C4.

[0178] 第三可调式电压供应单元33a,其输入端电性连接于第二输出端02,以接收初级控制信号产生单元61b所输出的初级控制信号。 [0178] The third adjustable voltage supply unit 33a, an input terminal electrically connected to the second output terminal 02 for receiving a primary control signal generating primary control signal output unit 61b. 同理,第四可调式电压供应单元34a的输入端电性连接于第三输出端03,同样用以接收初级控制信号。 Similarly, a fourth input terminal electrically adjustable voltage supply unit 34a is connected to the third output terminal 03, for receiving the same primary control signal. [0179] 又请同时参阅图5B所示,第三取样电容C3,其具有:一第五端点P5 ;以及一第六端点P6,而第四取样电容C4,其具有:一第七端点P7;以及一第八端点P8。 [0179] Referring also shown and 5B, the third sampling capacitor C3, having: a fifth terminal P5; and a sixth terminal P6, and the fourth sampling capacitor C4, having: a seventh terminal P7; and an eighth terminal P8. 其中,第五端点P5及第七端点P7分别借由一开关选择性地电性连接于第三可调式电压供应单元33a及第四可调式电压供应单元34a的输出端,而第五端点P5与第七端点P7又同样通过开关选择性地电性连接于一参考电压源13c,参考电压源13c可依照串接的取样电容C3、C4所需以输出参考电压。 Wherein the fifth terminal P5 and P7 seventh terminal by means of a switch are selectively electrically connected to the output of the third adjustable voltage supply unit 33a and the fourth adjustable voltage supply unit 34a, and a fifth terminal P5 and seventh terminal P7 and the same switch by selectively electrically connected to a reference voltage source 13c, the reference voltage source 13c can be connected in series in accordance with the sampling capacitor C3, C4 to output a desired reference voltage. 此外,第六端点P6及第八端点P8分别电性连接于第四输入端14及第五输入端15。 Further, the sixth terminal P6 and P8 respectively eighth terminal and a fifth input terminal 14 is electrically connected to the fourth input 15.

[0180] 如图6所示,除第一级的次级电荷转移模块30”外,每一级次级电荷转移电路包括:一第五电荷转移电路35 ;以及一第六电荷转移电路36。第五电荷转移电路35,其包括:一第五可调式电压供应单元35a ;以及一第五取样电容C5,而第六电荷转移电路36,其包括:一第六可调式电压供应单元36a ;以及第六取样电容C6。 As shown in [0180] FIG. 6, in addition to the secondary charge transfer stage of the first module 30 ", every one of the secondary charge transfer circuit comprising: a fifth charge transfer circuit 35; and a sixth charge transfer circuit 36. fifth charge transfer circuit 35, which includes: a fifth adjustable voltage supply unit 35a; and a fifth sampling capacitor C5, and the sixth charge transfer circuit 36, which comprises: a sixth adjustable voltage supply unit 36a; and The sixth sampling capacitor C6.

[0181 ] 第五可调式电压供应单元35a,其输入端电性连接于前一级次级控制信号产生单元71b的第五输出端05,以接收前一级次级控制信号产生单元71b所输出的次级控制信号。 [0181] The fifth adjustable voltage supply unit 35a, an input terminal electrically connected to a fifth output 05 before the secondary control signal generating unit 71b to the secondary control signal generation unit 71b before receiving an output a secondary control signal. 同理,第六可调式电压供应单元36a的输入端电性连接于前一级次级控制信号产生单元71b的第六输出端06,以接收次级控制信号。 Similarly, a sixth input terminal electrically adjustable voltage supply unit 36a is connected to the secondary control signal before generating a sixth output terminal 71b of the unit 06, to receive a secondary control signal.

[0182] 第五取样电容C5,其具有:一第九端点P9 ;以及一第十端点P10,而第六取样电容C6,其具有:一第i^一端点Pll ;以及一第十二端点P12。 [0182] The fifth sampling capacitor C5, having: a ninth terminal P9; and a tenth terminal P10, and the sixth sampling capacitor C6, having: a first end point Pll i ^; and a twelfth terminal P12 .

[0183] 第九端点P9及第i^一端点Pll分别借由开关选择性地电性连接于第五可调式电压供应单元35a及第六可调式电压供应单元36a的输出端,而第九端点P9与第十一端点Pll又同样分别通过开关选择性地电性连接于参考电压源13c,而参考电压源13c可依照串接的取样电容C5、C6所需以输出参考电压。 [0183] i ^ Ninth second endpoint P9 respectively by means of an end point Pll selectively electrically connected to the fifth switch of the adjustable voltage supply unit 35a and a sixth output terminal adjustable voltage supply unit 36a, and a ninth terminal P9 Pll and likewise the eleventh terminal, respectively by selectively switching electrically connected to the reference voltage source 13c, 13c and the reference voltage source may be connected in series in accordance with the sampling capacitors C5, C6 to the required output reference voltage. 此外,第十端点PlO及第十二端点P12则同样分别电性连接于本级的次级电压比较单元71a'的第四输入端14'及第五输入端15'。 Further, the tenth and twelfth terminal end PlO P12 are the same 'fourth input terminal 14' is electrically connected to a secondary stage of this voltage comparison unit 71a and the fifth input terminal 15 '.

[0184] 第三至第六可调式电压供应单元33a、34a、35a、36a都可以通过加权电阻式数字模拟转换器或R-2R梯形式数字模拟转换器来实现,且其电压输入端同样接收一上限电压及一下限电压,使得输出电压范围介于上限电压及下限电压之间,并且第三至第六可调式电压供应单元33a、34a、35a、36a的控制端(即输入端)受初级控制信号或次级控制信号的控制,以使第三至第六可调式电压供应单元33a、34a、35a、36a输出一模拟电压。 [0184] The third to sixth adjustable voltage supply unit 33a, 34a, 35a, 36a can be achieved by weighting the resistive digital to analog converter, or in the form of R-2R ladder DAC, and which also receives the voltage input terminal an upper limit voltage and lower limit voltage, the output voltage range between the upper limit and the lower limit voltage is between voltage, and the third to sixth adjustable voltage supply unit 33a, 34a, 35a, 36a of the control terminal (i.e., input) to primary control signal or the control of the secondary control signal, so that the third to sixth adjustable voltage supply unit 33a, 34a, 35a, 36a outputs an analog voltage.

[0185] 如图6所示,多工电容量测电路结构可进一步包括一控制模块50,其用以控制第一选择单元11、第二选择单元12及每一第二选择模块10”中一第三选择单元14及一第四选择单元15的开关状态,使待测电容40或转移电容41可以选择性地与第一、第二、第四及第五输入端II、12、14、14'、15、15'电性连接,并且控制模块50同样可以控制电荷转移电路中的开关,以使得多工电容量测电路结构可在充电阶段及电荷转移阶段间进行切换。 [0185] As shown in FIG 6, the capacitance sensing circuit multiplexing structure may further comprise the eleven control module 50, which means 11 for controlling the first selection, the second selection unit 12 and each of the second selection module 10 ' 14, and a fourth switching state of the third selection unit selecting unit 15, so that the capacitor 40 to be measured or transferring capacitor 41 may be selectively II and the first, second, fourth and fifth input terminals, 12,14,14 ', 15, 15' are electrically connected, and the control module 50 can also control the charge-transfer switch circuit, so that the multi-capacitance sensing circuit configuration can be switched between the charge phase and the charge transfer stage.

[0186] 图7A是本发明第二实施例在第一充电阶段的电路结构的示意图。 [0186] FIG. 7A is a diagram showing a circuit configuration of a second embodiment of the present invention in a first charging phase. 图7B是本发明第二实施例在第一电荷转移阶段的电路结构的示意图。 FIG 7B is a diagram showing a circuit configuration of a second embodiment of the present invention in a first embodiment of the charge transfer phase. 图7C是本发明第二实施例在第二充电阶段的电路结构的示意图。 FIG 7C is a diagram showing a circuit configuration of a second embodiment of the present invention in a second charging phase. 图7D是本发明第二实施例在第二电荷转移阶段的电路结构的示意图。 7D is a schematic diagram of a circuit configuration of a second embodiment of the present invention in a second charge transfer stage. 图7E是本发明第二实施例在第三充电阶段的电路结构的示意图。 FIG 7E is a diagram showing a circuit configuration of a second embodiment of the present invention in a third charging phase. 图7F是本发明第二实施例在第三电荷转移阶段的电路结构的示意图。 FIG 7F is a diagram illustrating a circuit configuration of a second embodiment of the present invention in a third embodiment of the charge transfer phase. 图7G是本发明第二实施例在第四充电阶段的电路结构的示意图。 7G is a schematic diagram of a circuit configuration of a second embodiment of the present invention in a fourth embodiment of the charging phase. 图7H是本发明第二实施例在第四电荷转移阶段的电路结构的不意图。 FIG 7H is a second embodiment of the present invention is not intended circuit configuration of the fourth charge transfer stage.

[0187] 如图7A所示,在第一充电阶段时,控制模块50切换第一开关SI、第三开关S3、第五开关S5、第七开关S7及第九开关S9,使其处于“0N”的状态,同时间第二开关S2、第四开关S4、第六开关S6及第八开关S8及次级信号处理模块70、70'、70”中所有开关皆处于“OFF”的状态,因而使得待测电容40与初级信号处理模块60是分离的。其中,待测电容40可借由电压源(图未示)充电,此外,由于第二开关S2及第四开关S4处于“OFF”的状态,使初级信号处理控制模块61与第一可调式电压供应单元31a和第二可调式电压供应单元32a处于电性隔离的状态,并由第一参考电压源13a及第二参考电压源13b分别对第一取样电容Cl及第二取样电容C2进行充电。 [0187] As shown in FIG. 7A, in the first charging phase, the control module 50 of the first switch the SI, the third switches S3, the fifth switch S5, the seventh switch S7 and the ninth switch S9, it is in "0N "state, the same time a second switch S2, the fourth switch S4, the sixth switch S6 and the eighth switch S8 and the secondary signal processing module 70, 70 ', 70", all switches are in the "OFF" state, and thus so that the capacitor 40 is measured with the primary signal processing module 60 are separate. wherein the capacitance 40 may be measured by means of a voltage source (not shown) charged, in addition, since the second switch S2 and the fourth switch S4 is "OFF" in state, the primary signal processing module 61 and the first control state is adjustable electrically isolated from the voltage supply unit 31a and a second adjustable voltage supply unit 32a, a first reference voltage source by the second reference voltage source 13a and 13b, respectively, first sampling capacitor Cl and a second sampling capacitor C2 is charged.

[0188] 请同时参阅图7B所示,继续在第一电荷转移阶段中,控制模块50切换第二开关 [0188] Please also refer to FIG. 7B, in the first charge transfer stage continues, the control module 50 switches the second switch

52、第四开关S4、第六开关S6及第八开关S8至“0N”的状态,反之第一开关SI、第三开关 52, a fourth switch S4, the sixth switch S6 and the eighth switch S8 to "0N" state, whereas the SI first switch, the third switch

53、第五开关S5、第七开关S7及第九开关S9及次级信号处理模块70、70'、70”的所有开关皆处于“OFF”的状态。此时,待测电容40、第一取样电容Cl及第二取样电容C2形成一电容分压回路,而第一可调式电压供应单元31a及第二可调式电压供应单元32a再借由初级控制信号,以调整第一取样电容Cl及第二取样电容C2上的偏压,使待测电容40的电荷转移至第一取样电容Cl及第二取样电容C2。 53, the fifth switch S5, the seventh switch S7 and the ninth switch S9 and the secondary signal processing module 70, 70 ', 70 "all of the switches are in the" state OFF "At this time, the capacitor 40 to be measured, a first sampling capacitor Cl and a second sampling capacitor C2 form a capacitor voltage dividing circuit, and a first adjustable voltage supply unit 31a and a second adjustable voltage supply unit 32a and then by means of a primary control signal to adjust the first and second sampling capacitors Cl bias on the two sampling capacitor C2, so that the charge transfer capacitor to be measured to the first sampling capacitor Cl and the second sampling capacitor C2 40.

[0189] 由于初级电压比较单元61a所输出一第一电压比较信号仍表示第一输入端Il及第二输入端12间存在有电压差,也代表着待测电容40上的电荷未完全转移至第一取样电容Cl及第二取样电容C2,故初级控制信号产生单元61b又产生初级控制信号以调整第一可调式电压供应单元31a及第二可调式电压供应单元32a产生的电压值,以进而调控第一取样电容Cl及第二取样电容C2两端的电压差,并达到侦测待测电容40的目的。 [0189] Since the primary voltage of the comparing unit 61a outputs a first comparison signal still indicates a first voltage input terminal and the second input terminal Il 12 there is a voltage difference, also represents the charge on the measurement capacitor 40 is not completely transferred to a first sampling capacitor Cl and a second sampling capacitor C2, so the primary control signal generating unit 61b and generate a primary voltage control signal to adjust the first adjustable voltage supply unit 31a and a second adjustable voltage supply unit (32a), and to further a first voltage-control sampling capacitors Cl and C2 across the second difference sampling capacitor, and the capacitor 40 to achieve the purpose of the test to detect. 其中,待测电容40的计算公式请参阅第一实施例所示。 Wherein, in the formula, please refer to measured capacitor 40 shown in the first embodiment.

[0190] 如图7C所示,由于仅借由一次的电荷转移阶段难以使第一输入端Il及第二输入端12的电压差趋近特定值,因此需进行第二充电阶段,同时间为了能再侦测待测电容40所产生新的电容值,故初级控制信号产生单元61b接收第一电压比较信号后,将初级控制信号传送至第三可调式电压供应单元33a或第四可调式电压供应单元34a,并将第一输入端Il及第二输入端12的电压差转移至次级信号处理模块70的转移电容41,使得调整第一输入端Il及第二输入端12电压差的动作,进一步交由次级信号处理模块70。 [0190] As shown in FIG. 7C, since only by means of a charge transfer stage of a first input terminal Il is difficult to make and the second input terminal 12 of the voltage difference approaches a certain value, thus the need for a second charging stage, for the same time longer detect new capacitance value of the capacitor 40 to be measured is generated, so the primary control signal generating unit 61b receives the first comparison signal voltage, the third primary control signal to the adjustable voltage supply unit 33a or the fourth adjustable voltage supply unit 34a, and a first input terminal Il and the second input terminal 12 of the voltage difference signal is transferred to a secondary processing module 41 of the transfer capacitor 70, a first input terminal Il of the adjusted second input terminal 12 and the voltage difference operation further referred to the secondary signal processing module 70.

[0191] 在第二充电阶段中,控制模块50切换第一级的次级信号处理模块70中第三选择单元14及第四选择单元15,使第一输入端Il及第二输入端12电性连接至转移电容41,因而使得第一输入端Il及第二输入端12的电压差传输至第一级的次级信号处理模块70中的转移电容41,也等同于第一取样电容Cl及第二取样电容C2对转移电容41进行充电。 [0191] In the second charging phase, the control module 50 switches the first stage of the secondary signal processing module 70 of the third and the fourth selection unit 14 selecting unit 15, the first input terminal and a second input terminal Il 12 connected to the transfer capacitor 41, thereby making the first input terminal and a second input terminal Il voltage difference in the transmission 12 to the first stage of the secondary capacitor 70 transfers the signal processing module 41 is also identical to the first sampling capacitor Cl and second sampling capacitor C2 for transferring capacitor 41 is charged. 同时间控制模块50还使第三取样电容C3及第四取样电容C4串联并且电性连接于参考电压源13c以进行充电,并为第二电荷转移阶段作准备。 The control module 50 is also the same time the third and fourth sampling sampling capacitor C3 capacitor C4 in series and electrically connected to a reference voltage source 13c to charge, and charge transfer in preparation for the second stage.

[0192] 如图7D所示,第二电荷转移阶段中,控制模块50再次切换第三选择单元14及第四选择单元15,使转移电容41电性连接至第四输入端14及第五输入端15,并且控制模块50还使第三可调式电压供应单元33a电性连接至第三取样电容C3及第四可调式电压供应单元34a电性连接至第四取样电容C4,再根据初级控制信号以调整第三取样电容C3及第四取样电容C4上的偏压,使转移电容41的电荷得以转移至取样电容C3、C4。 [0192] FIG. 7D, the second charge transfer phase, the control module 50 switches again to the third selection means 14 and the fourth selection means 15, the capacitor 41 is electrically connected to the fourth input terminal of the transfer 14 and a fifth input end 15, and the control module 50 further third adjustable voltage supply unit 33a is electrically connected to the third capacitor C3 and the fourth sampling adjustable voltage supply unit 34a is electrically connected to the fourth sampling capacitor C4, then according to the primary control signal third sampling to adjust the bias on the capacitor C3 and the fourth sampling capacitor C4, the capacitor 41 of the charge transfer is transferred to the sampling capacitor C3, C4. [0193] 接着,由次级电压比较单元71a比较第四输入端14及第五输入端15的电压差,再借由第四输出端04输出第二电压比较信号,虽然第一级次级信号处理模块70中的转移电容41两端仍存在有电压差,但第一级次级电压比较单元7Ia所输出的第二电压比较信号会比第一电压比较信号更趋近于一特定值。 [0193] Next, the voltage comparison unit 71a by the secondary input terminal of the fourth voltage comparator 14 and the fifth input 15 of the difference, and then by means of the fourth output terminal of the second voltage comparator 04 output signal, while the first stage the secondary signal transfer processing module 41 across the capacitor 70 has a voltage difference still present, but the first stage of the secondary voltage comparison unit 7Ia the second voltage comparator output signal will be more close to a particular value than the first voltage comparison signal.

[0194] 又如图7E所示,第三充电阶段中,控制模块50切换第二级的次级信号处理模块70'中第十开关S10'为“0N”的状态,并将第一级的次级信号处理模块70的第四输入端14及第五输入端15与第二级的次级信号处理模块70'的转移电容41'电性连接,使第一级的次级信号处理模块70的第三取样电容C3及第四取样电容C4再对第二级的转移电容41'充电,同时间控制模块50还使第五取样电容C5及第六取样电容C6串联并与参考电压源13c电性连接以充电。 [0194] Another example is shown in FIG. 7E, the third charging phase, the control module 50 switches the second stage of the secondary signal processing module 70 'of the tenth switch S10' status is "0N", and the first stage fourth input terminal 70 of the secondary signal processing modules 14 and 15 and the second end of the secondary stage to a fifth input signal processing module 70 'of the transfer capacitance 41' is electrically connected to the first stage of the secondary signal processing module 70 sampling a third capacitor C3 and the fourth capacitor C4 sample and then transferred to the second capacitor stage 41 'charge the same time also the control module 50 of the fifth and sixth sampler sampling capacitor C5 and capacitor C6 in series with the reference voltage power source 13c connected to charge.

[0195] 如图7F所示,第三电荷转移阶段中,转移电容41'与第五取样电容C5及第六取样电容C6电性连接,并借由第五可调式电压供应单元35a与第六可调式电压供应单元36a产生的电压值,使转移电容41'将电荷转移至第五取样电容C5及第六取样电容C6,第二级的次级电压比较单元71a'会再产生比第一级的次级电压比较单元71a更趋近于特定值的第二电压比较信号。 [0195] FIG. 7F, the third stage of the charge transfer, the transfer capacitor 41 'is connected to the fifth and sixth sampling capacitor C5 is electrically sampling capacitor C6, and adjustable by means of a fifth and sixth voltage supply unit 35a adjustable voltage value generated by the voltage supply unit 36a, so that the transfer capacitor 41 'to transfer charge to the sampling capacitor C5, the fifth and the sixth sampling capacitor C6, the secondary voltage of the second stage of the comparing unit 71a' than the first stage will accrue secondary voltage comparison unit 71a of the second voltage comparator signal is more close to a specific value.

[0196] 如图7G所示,相似于上述充电阶段,第四充电阶段借由将第三级的次级信号处理模块70”中的转移电容41”与第二级的次级信号处理模块70'的第四输入端14'及第五输入端15'电性连接,以将第二级的次级信号处理模块70'的第四输入端14'及第五输入端15'两端的电压差传送至转移电容41”,而第十开关S10”呈“0N”的状态,使第五取样电容C5'及第六取样电容C6'串联并与参考电压源13c电性连接以进行充电。 [0196] FIG. 7G, similar to the charge phase, the charge phase by means of a fourth stage of the third secondary signal processing module 70 "in the transfer capacitance 41" and the secondary signal processing module 70 of the second stage 'the fourth input terminal 14' and the fifth input terminal 15 'is electrically connected to the second stage of the secondary signal processing module 70' of the fourth input end 14 'and a fifth input terminal 15' the voltage difference across the transferred to the transfer capacitor 41 ', and the tenth switch SlO "in a state of" 0N "of the fifth sampling capacitors C5' and a sixth sampling capacitor C6 'in series and electrically connected to the reference voltage source 13c for charging.

[0197] 如图7H所示,第四电荷转移阶段,转移电容41”与第五取样电容C5'及第六取样电容C6'电性连接以进行电荷转移,再由次级电压比较单元71a”产生的第二电压比较信号输入次级控制信号产生单元71b”,最终由次级控制信号产生单元71b”产生的信号又会更趋近于特定值,其中特定值可以为零电位或一极趋近于零的电位。 [0197], the fourth charge transfer stage in FIG. 7H, the transfer capacitor 41 "and the fifth sampling capacitors C5 'and a sixth sampling capacitor C6' is electrically connected to the charge transfer, and then by the secondary voltage comparison unit 71a" a second comparison signal generated by the input voltage the secondary control signal generating unit 71b ", ultimately by the secondary control signal generation unit 71b" signal generated will more close to a specific value, wherein the specific value may be a pole or a zero potential trend potential near zero.

[0198] 图8是本发明第二实施例逐次逼近型模拟数字转换器的信号时序图。 [0198] FIG. 8 is a successive approximation analog to digital converter is a signal timing diagram of a second embodiment of the present invention. 图9是本发明第二实施例快闪式模拟数字转换器的信号时序图。 FIG 9 is a signal timing diagram of the flash analog to digital converter of a second embodiment of the present invention. 图10是本发明第一实施例及第二实施例的信号时序的对照图。 FIG. FIG. 10 is a control signal timing according to the second embodiment and the first embodiment of the present invention.

[0199] 如图8及图9所示,当逐次逼近型(SAR)模拟数字转换器作为控制信号产生单元时,控制信号产生单元逐次调整电压值,而快闪式(Flash)模拟数字转换器作为控制信号产生单元,每一控制信号的电压调整是相对快速的,因此逐次逼近型模拟数字转换器相较于快闪式模拟数字转换器须耗费较多的时间单位。 [0199] FIGS. 8 and 9, a signal generating unit when the successive approximation (SAR) analog to digital converter as a control, a control signal generating means sequentially adjusting the voltage value, and the analog flash (Flash) digitizer a control signal generation unit, each of the control voltage adjustment signal is relatively fast, so successive approximation analog to digital converter is compared to the flash analog to digital converter to be more time-consuming units.

[0200] 如图10所示,当使用多工电容量测电路结构侦测待测电容时,由于串接多个信号处理模块,使得量测四个待测电容40a、40b、40c、40d时,若使用逐次逼近型模拟数字转换器需十四个单位时间,而使用快闪式模拟数字转换器只需要十一个单位时间,因此使用多工电容量测电路结构可大幅提升多个待测电容时电容值的量测效率。 [0200] As shown in FIG. 10, when a multi-measuring capacitance measured capacitance detection circuit configuration, since a plurality of signal processing modules in series, so that four measuring capacitor under test 40a, 40b, 40c, 40d when If using a successive approximation type analog-digital converter need fourteen unit time, using a flash analog to digital converter requires only eleven unit time, and therefore the use of multi-capacitance sensing circuit configuration can significantly enhance the plurality of test measuring the capacitance value of the capacitance efficiency. [0201] 以上所述,仅是本发明的较佳实施例而已,并非对本发明作任何形式上的限制,虽然本发明已以较佳实施例揭露如上,然而并非用以限定本发明,任何熟悉本专业的技术人员,在不脱离本发明技术方案范围内,当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例,但凡是未脱离本发明技术方案内容,依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰,均仍属于本发明技术方案的范围内。 [0201] The above are only preferred embodiments of the present invention only, not limitation of the present invention in any form, although the invention has been disclosed above by the preferred embodiments, but not intended to limit the present invention, anyone familiar with Those skilled in the art, without departing from the scope of the technical solution of the present invention, when the content of the above techniques can be used to make minor modifications disclosed as equivalent variations or modifications equivalent embodiments, but all without departing from the technical content of the present invention, according to technical essence of the invention is a simple modification of any of the above embodiments made equivalent modifications and variations, provided they fall within the scope of the present invention.

Claims (31)

  1. 1. 一种具有电荷转移电路的电容量测电路结构,用以侦测至少一待测电容,其特征在于其包括: 一选择模块,其包括:一第一选择单元及一第二选择单元,其中该待测电容电性连接于该第一选择单元及该第二选择单元之间; 一信号处理控制模块,其包括: 一电压比较单兀,其具有:一第一输入端,其串联于该第一选择单兀的一端;一第二输入端,其串联于该第二选择单兀的一端;以及一第一输出端,其用以输出一电压比较信号;一第一开关,其电性连接于该第一输入端及该第二输入端之间;及一控制信号产生单元,其具有:一第三输入端,其电性连接于该第一输出端以接收该电压比较信号;以及一第二输出端及一第三输出端,用以分别输出一控制信号;以及一电荷转移模块,其包括: 一第一电荷转移电路,其包括: 一第一可调式电压供应单元 The capacitance sensing circuit having a structure of a charge transfer circuit, for detecting at least one measured capacitance, characterized in that it comprises: a selection module, comprising: a first selecting unit, and a second selecting unit, wherein the measured capacitor is electrically connected between the first selection and the second selection unit means; a control signal processing module, comprising: a single voltage comparator Wu, having: a first input terminal which is connected in series the first end of the selected single Wu; a second input terminal, which is connected in series with one end of the second select single Wu; and a first output terminal, the voltage comparator for outputting a signal; a first switch electrically connected between the first input terminal and the second input terminal; and a control signal generating unit, which has: a third input terminal electrically connected to the first output terminal for receiving the voltage comparison signal; and a second output and a third output terminal for outputting a control signal, respectively; and a charge transfer module, comprising: a first charge transfer circuit, comprising: a first adjustable voltage supply unit 其输入端电性连接于该第二输出端用以接收该控制信号;及一第一取样电容,其具有:一第一端点,其电性连接于该第一可调式电压供应单兀的输出端;以及一第二端点,其电性连接于该第一输入端'及一第二电荷转移电路,其包括: 一第二可调式电压供应单元,其输入端电性连接于该第三输出端用以接收该控制信号;及一第二取样电容,其具有:一第三端点,其电性连接于该第二可调式电压供应单元的输出端;以及一第四端点,其电性连接于该第二输入端; 其中,该控制信号产生单元在第N周期时读取该电压比较信号,以决定该控制信号,借此使该电压比较信号在第N+1周期时较该第N周期时更趋近于一特定值,其中该N为正整数。 An input terminal electrically connected to the second output terminal for receiving the control signal; and a first sampling capacitor, having: a first end which is electrically connected to the first voltage supply single adjustable Wu an output terminal; and a second end which is electrically connected to the first input terminal 'and a second charge transfer circuit, comprising: a second adjustable voltage supply unit, an input terminal electrically connected to the third an output terminal for receiving the control signal; and a second sampling capacitor, having: a third terminal electrically connected to the output terminal of the second adjustable voltage supply unit; and a fourth terminal which is electrically connected to the second input terminal; wherein the control signal generating unit reads the voltage comparison signal when the N-th cycle to determine the control signal, whereby the voltage at said first comparison signal is compared with the first N + 1 cycle more close to a certain value of N cycles, where the N is a positive integer.
  2. 2.根据权利要求I所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的第一可调式电压供应单兀为一第一电阻式数字模拟转换电路,其电压输入端接收一第一上限电压及一第一下限电压,并且该第一电阻式数字模拟转换电路的控制端电性连接于该第二输出端以受该控制信号控制,以使该第一电阻式数字模拟转换电路输出一第一模拟电压,而该第一电阻式数字模拟转换电路的该输出端又借由一第二开关选择性电性连接于该第一端点,并且该第一端点又借由一第三开关选择性电性连接于一第一参考电压源,以接收一第一参考电压。 The capacitance sensing circuit structure having a charge transfer circuit according to claim I, wherein wherein said first adjustable voltage supply is a single Wu first resistive digital to analog conversion circuit input voltage receiving a first voltage and a first upper limit voltage, and the first control terminal electrically resistive digital to analog conversion circuit is connected to the second output terminal by the control signal, so that the first resistive digital a first analog converter circuit outputs analog voltage, and the output of the first resistive digital to analog conversion circuit in turn connected by means of a second switch selectively electrically to the first terminal, and the first endpoint, and by means of a third switch selectively electrically connected to a first reference voltage source, to receive a first reference voltage.
  3. 3.根据权利要求I所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的第二可调式电压供应单元为一第二电阻式数字模拟转换电路,其电压输入端接收一第二上限电压及一第二下限电压,并且该第二电阻式数字模拟转换电路的控制端电性连接于该第三输出端以受该控制信号控制,以使该第二电阻式数字模拟转换电路输出一第二模拟电压,而该第二电阻式数字模拟转换电路的该输出端又借由一第四开关选择性电性连接于该第三端点,并且该第三端点又借由一第五开关选择性电性连接于一第二参考电压源,以接收一第二参考电压。 The capacitance sensing circuit structure having a charge transfer circuit according to claim I, characterized in that the adjustable second voltage supply unit, wherein said second resistor is a digital analog converter circuit which receives a voltage input terminal a second upper voltage and a second lower limit voltage, and the control terminal of the second resistor digital-analog conversion circuit is connected to the third output terminal to receiving the control signal, so that the second resistive digital to analog a second converter circuit outputs analog voltage, and the output of the second resistive digital to analog conversion circuit in turn connected by means of a fourth switch selectively electrically to the third terminal, and the third terminal by means of a turn a fifth switch selectively electrically connected to a second reference voltage source, to receive a second reference voltage.
  4. 4.根据权利要求I所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的第一选择单元包括:一第六开关,其串接于该第一输入端;以及一第七开关,其串接于该第六开关;以及该第二选择单元包括:一第八开关,其串接于该第二输入端;以及一第九开关,其串接于该第八开关,其中该待测电容的一端电性连接于该第六开关及该第七开关之间的一第一节点,且该待测电容的另一端电性连接于该第八开关及该第九开关之间的一第二节点。 According to claim capacitance sensing circuit having a charge transfer circuit structure of claim I, wherein wherein said first selection unit comprises: a sixth switch connected in series to the first input terminal; and a a seventh switch connected in series to the sixth switch; and a second selecting unit comprises: an eighth switch connected in series to the second input terminal; and a ninth switch, the eighth switch which is connected in series , wherein one end of the capacitor under test is electrically connected to a node between the sixth switch and the seventh switch, and the other end of the capacitor is electrically connected to the test of the eighth switch and the ninth switch a second node between.
  5. 5.根据权利要求I所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的第一选择单元及该第二选择单元分别为一多工器,以选择性电性连接于一该待测电容。 The capacitance sensing circuit structure having a charge transfer circuit according to claim I, wherein said first selecting means, and wherein the second selecting means are a multiplexer for selectively electrically connected to a capacitor in the test.
  6. 6.根据权利要求I所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的信号处理控制模块进一步包括至少一模拟信号处理电路,其串联于该第一开关与该电压比较单元之间。 The capacitance sensing circuit structure having a charge transfer circuit according to claim I, wherein wherein said signal processing control module further includes at least one analog signal processing circuit, which is connected in series to the first switch and the voltage between the comparison unit.
  7. 7.根据权利要求6所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的模拟信号处理电路包括:一模拟式滤波器,其输入端串接于该第一开关;以及一可调程序化放大器,其输入端串接于该模拟式滤波器的输出端,该可调程序化放大器的输出端串接于该电压比较单元。 7. The capacitance sensing circuit structure having a charge transfer circuit according to claim 6, characterized in that said analog signal processing circuit comprising: an analog filter having an input terminal connected in series to the first switch; an adjustable and programmable amplifier having an input terminal connected in series to the output of the analog filter, an adjustable program of the output of the amplifier connected in series to the voltage comparison unit.
  8. 8.根据权利要求6所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的模拟信号处理电路包括:一可调程序化放大器,其输入端串接于该第一开关;以及一模拟式滤波器,其输入端串接于该可调程序化放大器的输出端,该模拟式滤波器的输出端串接于该电压比较单元。 The capacitance sensing circuit structure having a charge transfer circuit according to claim 6, characterized in that said analog signal processing circuit comprising: an adjustable programmable amplifier having an input terminal connected in series to the first switch ; and an analog filter having an input terminal connected in series to the output of the adjustable programmable amplifier, the output of the analog filter is connected in series to the voltage comparison unit.
  9. 9.根据权利要求I所述的具有电荷转移电路的电容量测电路结构,其特征在于其中所述的控制信号产生单元为一快闪式模拟数字转换器或一逐次逼近型模拟数字转换器。 9. The capacitance sensing circuit having a charge transfer circuit structure according to claim I, wherein wherein said control signal generating means is a flash ADC or a successive approximation analog to digital converter.
  10. 10.根据权利要求I所述的具有电荷转移电路的电容量测电路结构,其特征在于其进一步包括一控制模块,其控制该第一选择单元及该第二选择单元,使该待测电容选择性地与该第一输入端及该第二输入端电性连接。 10. The capacitance sensing circuit as claimed in claim structure having a charge transfer circuit of claim I, further characterized in that it comprises a control module that controls the first selecting means and the second selecting means so that the measured capacitance selection connectable to the first input terminal and the second input terminal electrically.
  11. 11. 一种具有电荷转移电路的多工电容量测电路结构,用以侦测至少一待测电容,其特征在于其包括: 一第一选择模块,其包括:一第一选择单元及一第二选择单元,其中该待测电容电性连接于该第一选择单元及该第二选择单元之间; 一初级信号处理模块,其包括: 一初级信号处理控制模块,其输入端与该第一选择单元及该第二选择单元电性连接,且其输出端输出一初级控制信号;及一初级电荷转移模块,其输入端接收该初级控制信号,其输出端电性连接于该初级信号处理控制模块的输入端;以及至少一次级信号处理模块,且每一该次级信号处理模块依序彼此串接,该些次级信号处理模块中第一级的该次级信号处理模块串接于该初级信号处理模块,其中每一该次级信号处理模块包括: 一第二选择模块,其输入端电性连接于前一级的该初级信号处 The capacitance sensing circuit 11. The structure of the charge transfer circuit having a multi-station, at least one test for detecting capacitance, characterized in that it comprises: a first selection module, comprising: a first and a second selecting unit two selection unit, wherein the measured capacitor is electrically connected between the first selection means and the second selecting unit; a primary signal processing module, comprising: a primary control signal processing module and the first input terminal selecting means and the second selection unit is electrically connected, and an output terminal outputting a primary control signal; and a primary charge transfer module, which receives the primary input control signal, an output terminal electrically connected to the primary signal processing control the module inputs; and at least one secondary signal processing module, and each of the secondary signal processing module connected in series with each other sequentially, the plurality of secondary signal processing module in a first stage of the secondary signal processing module in the series a primary signal processing module, wherein each of the secondary signal processing module comprises: a second selection module, an input terminal electrically connected to the primary signal at the previous stage 控制模块或前一级的一次级信号处理控制模块的输入端; 该次级信号处理控制模块,其输入端与该第二选择模块电性连接,且其输出端输出一次级控制信号;以及一次级电荷转移模块,其输入端接收前一级输出的该初级控制信号或前一级输出的该次级控制信号,该次级电荷转移模块的输出端电性连接于该次级信号处理控制模块的输入端。 A control module the control module of the signal processing stage input or preceding stage; the secondary signal processing control module, an input terminal connected to the second electrically selection module, and the output terminal of the first stage control signal; and a charge transfer stage module, the secondary control signal to the primary control signal output from a front end of a receiver input or output before the output terminal of the secondary charge transfer modules connected to the secondary signal processing control module input.
  12. 12.根据权利要求11所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的初级信号处理控制模块包括: 一初级电压比较单元,其具有:一第一输入端,其电性连接于该第一选择单元的一端;一第二输入端,其串联于该第二选择单兀的一端;以及一第一输出端,其用以输出一第一电压比较信号; 一第一开关,其电性连接于该第一输入端及该第二输入端之间;以及一初级控制信号产生单元,其具有:一第三输入端,其电性连接于该第一输出端以接收该第一电压比较信号;以及一第二输出端及一第三输出端,其用以分别输出该初级控制信号。 The signal processing control module 12. The primary multiplex structure having a capacitance sensing circuit of the charge transfer circuit according to claim 11, wherein wherein said comprises: a primary voltage comparison unit, having: a first input terminal , which is electrically connected to one end of the first selection unit; a second input terminal, which is connected in series with one end of the second select single Wu; and a first output terminal, the first voltage comparator for outputting a signal; a first switch electrically connected between the first input terminal and the second input terminal; and a primary control signal generating unit, which has: a third input terminal electrically connected to the first output a first voltage terminal for receiving the comparison signal; and a second output and a third output terminal which outputs to the primary control signal.
  13. 13.根据权利要求12所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的初级信号处理控制模块进一步包括至少一第一模拟信号处理电路,其串联于该第一开关与该初级电压比较单元之间。 A primary signal processing control module 13. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 12, wherein wherein said further comprises at least a first analog signal processing circuit, which is connected in series to the first a switch between the primary voltage is compared with the unit.
  14. 14.根据权利要求13所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第一模拟信号处理电路包括:一第一模拟式滤波器,其输入端串接于该第一开关;以及一第一可调程序化放大器,其输入端串接于该第一模拟式滤波器的输出端,而该第一可调程序化放大器的输出端串接于该初级电压比较单元。 14. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 13, wherein wherein said first analog signal processing circuit comprising: a first analog filter having an input terminal connected in series to the first switch; and a first adjustable programmable amplifier having an input terminal connected in series with the output terminal of the first analog filter, and the output terminal of the first adjustable programmable amplifier is connected in series to the primary voltage comparison unit.
  15. 15.根据权利要求13所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第一模拟信号处理电路包括:一第一可调程序化放大器,其输入端串接于该第一开关;以及一第一模拟式滤波器,其输入端串接于该第一可调程序化放大器的输出端,该第一模拟式滤波器的输出端串接于该初级电压比较单元。 15. A multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 13, wherein wherein said first analog signal processing circuit comprising: a first adjustable programmable amplifier having an input terminal sequence connected to the first switch; and a first analog filter having an input terminal connected in series to the output terminal of the first programmable adjustable amplifier, an output terminal of the first analog filter is connected in series with the primary voltage Compare unit.
  16. 16.根据权利要求12所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的初级控制信号产生单元为一快闪式模拟数字转换器或一逐次逼近型模拟数字转换器。 The capacitance sensing circuit having a multi-structure of the charge transfer circuit according to claim 12, characterized in that the primary wherein said control signal generating unit is a flash ADC or a successive approximation analog-digital converter.
  17. 17.根据权利要求12所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的初级电荷转移模块,包括: 一第一电荷转移电路,其包括: 一第一可调式电压供应单元,其输入端电性连接于该第二输出端用以接收该初级控制信号;及一第一取样电容,其具有:一第一端点,其电性连接于该第一可调式电压供应单兀的输出端;以及一第二端点,其电性连接于该第一输入端;以及一第二电荷转移电路,其包括: 一第二可调式电压供应单元,其输入端电性连接于该第三输出端用以接收该初级控制信号;及一第二取样电容,其具有:一第三端点,其电性连接于该第二可调式电压供应单元的输出端;以及一第四端点,其电性连接于该第二输入端。 17. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 12, wherein wherein said primary charge transfer module, comprising: a first charge transfer circuit, comprising: a first modal voltage supply unit, an input terminal electrically connected to the second output terminal for receiving the primary control signal; and a first sampling capacitor, having: a first end which is electrically connected to the first a voltage supply output terminal of a single-tone Wu; and a second terminal electrically connected to the first input terminal; and a second charge transfer circuit, comprising: a second adjustable voltage supply unit, an input terminal electrically connected to the third output terminal for receiving the primary control signal; and a second sampling capacitor, having: a third terminal, which is electrically connected to the second output terminal adjustable voltage supply unit; and a a fourth terminal electrically connected to the second input terminal.
  18. 18.根据权利要求17所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第一可调式电压供应单元为一第一电阻式数字模拟转换电路,其电压输入端接收一第一上限电压及一第一下限电压,并且该第一电阻式数字模拟转换电路的控制端电性连接于该第二输出端以受该初级控制信号控制,以使该第一电阻式数字模拟转换电路输出一第一模拟电压,又该第一电阻式数字模拟转换电路的该输出端又借由一第二开关选择性电性连接于该第一端点,并且该第一端点又借由一第三开关选择性电性连接于一第一参考电压源,以接收一第一参考电压;以及该第二可调式电压供应单元为一第二电阻式数字模拟转换电路,其电压输入端接收一第二上限电压及一第二下限电压,并且该第二电阻式数字模拟转换电路的控制端电性连接于该第三输出端以受 18. A multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 17, wherein wherein said first adjustable voltage supply unit is a first resistive digital to analog conversion circuit input voltage a first terminal for receiving a first limit voltage and lower limit voltage, and the control terminal of the first electrically resistive digital to analog converter circuit is connected to the second output terminal to the primary by the control signal, so that the first resistor digital analog converter circuit outputs a first analog voltage, should the output terminal of the first resistive digital to analog conversion circuit in turn by a second switch selectively connected electrically to the first terminal, and the first end by means of a point and a third switch selectively electrically connected to a first reference voltage source, to receive a first reference voltage; and a second adjustable voltage supply unit is a second resistive digital to analog conversion circuit voltage input terminal receiving a second voltage and a second upper limit voltage, and the second control terminal electrically resistive digital-analog converter circuit is connected to the third output terminal in a subject 初级控制信号控制,以使该第二电阻式数字模拟转换电路输出一第二模拟电压,而该第二电阻式数字模拟转换电路的该输出端又借由一第四开关选择性电性连接于该第三端点,并且该第三端点又借由一第五开关选择性电性连接于一第二参考电压源,以接收一第二参考电压。 A primary control signal, so that the second resistive digital to analog converter circuit outputs a second analog voltage, and the second resistive digital to analog conversion circuit in turn connected to the output terminal by means of a fourth switch to selectively electrically the third terminal, and the third terminal is in turn connected by means of a fifth switch selectively electrically to a second reference voltage source, to receive a second reference voltage.
  19. 19.根据权利要求12所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第一选择单元包括:一第六开关,其串接于该第一输入端;以及一第七开关,其串接于该第六开关;以及该第二选择单元包括:一第八开关,其串接于该第二输入端;以及一第九开关,其串接于该第八开关,其中该待测电容的一端电性连接于该第六开关及该第七开关之间的一第一节点,且该待测电容的另一端电性连接于该第八开关及该第九开关之间的一第二节点。 The capacitance sensing circuit having a multi-structure 19. The charge transfer circuit according to claim 12, wherein wherein said first selection unit comprises: a sixth switch connected in series to the first input terminal; and a seventh switch connected in series to the sixth switch; and a second selecting unit comprises: an eighth switch connected in series to the second input terminal; and a ninth switch which is connected in series to the first eight switches, wherein one end of the capacitor under test is electrically connected to a node between the sixth switch and the seventh switch, and the other end of the capacitor under test is electrically connected to the eighth switch and the second a second switch point between nine.
  20. 20.根据权利要求11所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第二选择模块包括:一第三选择单元及一第四选择单元,且该第三选择单元及该第四选择单元之间电性连接有一转移电容。 20. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 11, wherein wherein said second selection module comprising: a third selection unit, and a fourth selecting unit, and the second between three and the fourth selection means selecting unit is electrically connected with a transfer capacitance.
  21. 21.根据权利要求20所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中在第一级的该次级信号处理模块中,该第三选择单元电性连接于该第一选择单元的一端,而该第四选择单元则电性连接于该第二选择单元的一端。 21. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 20, characterized in that in a first stage wherein the secondary signal processing module, the third selection unit is electrically connected to the second one end of a selection unit, and the fourth selection means is electrically connected to one end of the second selection unit.
  22. 22.根据权利要求20所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的次级信号处理模块中,该第三选择单元电性连接于前一级的该第三选择单元,而该第四选择单元则电性连接于前一级的该第四选择单元。 22. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 20, characterized in that the secondary wherein said signal processing module, the third selection unit is electrically connected to the preceding stage third selecting means, and the fourth selection means is electrically connected to the previous stage of the fourth selection means.
  23. 23.根据权利要求11至22中任一权利要求所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中每一该次级信号处理控制模块包括: 一次级电压比较单兀,其具有:一第四输入端,其串联于该第三选择单兀的一端;一第五输入端,其串联于该第四选择单元的一端;以及一第四输出端,其用以输出一第二电压比较信号; 一第十开关,其电性连接于该第四输入端及该第五输入端之间;以及一次级控制信号产生单元,其具有:一第六输入端,其电性连接于该第四输出端以接收该第二电压比较信号;以及一第五输出端及一第六输出端,其用以分别输出该次级控制信号。 23. 11 to 22 multi-structure having a capacitance sensing circuit of the charge transfer circuit according to one of the preceding claims, characterized in that each of the secondary signal processing wherein the control module comprises: a single stage voltage comparator Wu having: a fourth input terminal, which is connected in series to an end of the third selection unit Wu; and a fifth input, which is connected in series with one end of the fourth selection means; and a fourth output terminal, for outputting thereof comparing a second voltage signal; a tenth switch which is electrically connected between the fourth input terminal and said fifth input; and a level control signal generating unit, comprising: a sixth input terminal electrically connected to the fourth output terminal to receive the second voltage comparison signal; and a fifth output terminal and a sixth output terminal, the control signal for outputting the secondary, respectively.
  24. 24.根据权利要求23所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的次级信号处理控制模块进一步包括至少一第二模拟信号处理电路,其串联于该第十开关与该次级电压比较单元之间。 24. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 23, wherein said secondary signal processing wherein the control module further comprises at least a second analog signal processing circuit, which is connected in series to the a tenth switch and the secondary voltage between the comparison unit.
  25. 25.根据权利要求24所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第二模拟信号处理电路包括:一第二模拟式滤波器,其输入端串接于该第十开关;以及一第二可调程序化放大器,其输入端串接于该第二模拟式滤波器的输出端,该第二可调程序化放大器的输出端串接于该次级电压比较单元。 25. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 24, wherein wherein said second analog signal processing circuit comprises: a second analog filter having an input terminal connected in series to the tenth switch; and a second adjustable programmable amplifier having an input terminal connected in series to an output terminal of the second analog filter, the output of the second adjustable programmable amplifier is connected in series to the secondary voltage comparison unit.
  26. 26.根据权利要求24所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第二模拟信号处理电路包括:一第二可调程序化放大器,其输入端串接于该第十开关;以及一第二模拟式滤波器,其输入端串接于该第二可调程序化放大器的输出端,该第二模拟式滤波器的输出端串接于该次级电压比较单元。 26. A multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 24, wherein wherein said second analog signal processing circuit comprises: a second adjustable programmable amplifier having an input terminal sequence connected to the tenth switch; and a second analog filter having an input terminal connected in series to the second output terminal of programmable adjustable amplifier, an output terminal of the second analog filter is connected in series with the secondary voltage comparison unit.
  27. 27.根据权利要求23所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的次级控制信号产生单元为一快闪式模拟数字转换器或一逐次逼近型模拟数字转换器。 27. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 23, wherein the secondary control signal wherein the generating unit is a flash ADC or a successive approximation analog digital converter.
  28. 28.根据权利要求23所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中第一级的该次级电荷转移模块,其包括: 一第三电荷转移电路,其包括: 一第三可调式电压供应单元,其输入端电性连接于该第二输出端,以接收该初级控制信号;及一第三取样电容,其具有:一第五端点,其电性连接于该第三可调式电压供应单元的输出端;以及一第六端点,其电性连接于该第四输入端;以及一第四电荷转移电路,其包括: 一第四可调式电压供应单元,其输入端电性连接于该第三输出端,以接收该初级控制信号;及一第四取样电容,其具有:一第七端点,其电性连接于该第四可调式电压供应单元的输出端;以及一第八端点,其电性连接于该第五输入端。 28. A multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 23, characterized in that the first stage of the secondary charge transfer module, comprising: a third charge transfer circuit, comprising: a third adjustable voltage supply unit, an input terminal electrically connected to the second output terminal, for receiving the primary control signal; and a third sampling capacitor, having: a fifth terminal electrically connected to the output of the third adjustable voltage supply unit; and a sixth terminal, which is electrically connected to the fourth input terminal; and a fourth charge transfer circuit, comprising: a fourth adjustable voltage supply unit which inputs terminal electrically connected to the third output terminal, for receiving the primary control signal; and a fourth sampling capacitor, having: a seventh terminal electrically connected to the fourth output terminal of the voltage supply unit is adjustable; and an eighth terminal, which is electrically connected to the fifth input.
  29. 29.根据权利要求23所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中除第一级的该次级电荷转移模块外,每一级该次级电荷转移电路包括: 一第五电荷转移电路,其包括: 一第五可调式电压供应单元,其输入端电性连接于前一级该次级信号处理控制模块的该第五输出端,以接收该次级控制信号;及一第五取样电容,其具有:一第九端点,其电性连接于该第五可调式电压供应单元的输出端;以及一第十端点,其电性连接于该第四输入端;以及一第六电荷转移电路,其包括: 一第六可调式电压供应单元,其输入端电性连接于前一级该次级信号处理控制模块的该第六输出端,以接收该次级控制信号;及一第六取样电容,其具有:一第十一端点,其电性连接于该第六可调式电压供应单元的输出端;以及一第十二端点,其电性连接于该第 29. A multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 23, characterized in that in addition to the first stage of the secondary charge transfer modules, each one of the secondary charge transfer circuit comprising: a fifth charge transfer circuit, comprising: a fifth adjustable voltage supply unit, the fifth output terminal of the secondary signal processing control module which is electrically connected to the input terminal of a previous stage, to receive the secondary control signal ; and a fifth sampling capacitor, having: a ninth terminal electrically connected to the output terminal of the fifth adjustable voltage supply unit; and a tenth terminal, which is electrically connected to the fourth input terminal; and a sixth charge transfer circuit, comprising: a sixth adjustable voltage supply unit, the sixth output terminal of the secondary signal processing control module which is electrically connected to the input terminal of a previous stage to receive the secondary control signal; and a sixth sampling capacitor, having: an eleventh terminal, which is electrically connected to the sixth output terminal adjustable voltage supply unit; and a twelfth terminal, which is electrically connected to the second 输入端。 Input.
  30. 30.根据权利要求11所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其中所述的第一选择单元及该第二选择单元分别为一多工器,以选择性电性连接于一该待测电容。 30. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 11, wherein said first selecting means, and wherein the second selecting means are a multiplexer for selectively electrically a connected to the capacitor under test.
  31. 31.根据权利要求11所述的具有电荷转移电路的多工电容量测电路结构,其特征在于其进一步包括一控制模块,其控制该第一选择单元、该第二选择单元及每一该第二选择模块中一第三选择单元及一第四选择单元的开关状态。 31. The multi-structure having a capacitance sensing circuit of the charge transfer circuit according to claim 11, characterized in that it further comprises a control module that controls the first selecting unit, the second selecting unit, and each of the second two switching state selection module, and a third selection cell to a fourth selecting unit.
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