CN1741375A - Amplifying circuit that can dynamically adjust the supply voltage - Google Patents

Amplifying circuit that can dynamically adjust the supply voltage Download PDF

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Publication number
CN1741375A
CN1741375A CN 200410057906 CN200410057906A CN1741375A CN 1741375 A CN1741375 A CN 1741375A CN 200410057906 CN200410057906 CN 200410057906 CN 200410057906 A CN200410057906 A CN 200410057906A CN 1741375 A CN1741375 A CN 1741375A
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China
Prior art keywords
voltage
amplifier
supply voltage
amplifying circuit
input
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Granted
Application number
CN 200410057906
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Chinese (zh)
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CN1741375B (en
Inventor
李朝政
陈宗明
冯介民
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Realtek Semiconductor Corp
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Realtek Semiconductor Corp
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Priority to CN 200410057906 priority Critical patent/CN1741375B/en
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Publication of CN1741375B publication Critical patent/CN1741375B/en
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Abstract

The invention discloses an amplifying circuit, which can utilize a switched capacitor voltage converter to dynamically adjust the supply voltage of an amplifier according to the output signal or the input signal of the amplifier so as to improve the energy use efficiency of the amplifying circuit. The switched capacitor voltage converter can switch and select the magnitude of the supply voltage. The amplifier circuit further comprises a control device coupled to an input end or an output end of the amplifier for generating a control signal to the switched capacitor voltage converter according to an input signal or an output signal of the amplifier.

Description

Can dynamically adjust the amplifying circuit of service voltage
Technical field
The present invention relates to a kind of amplifying circuit, particularly relate to a kind of amplifying circuit that utilizes the switch-capacitor electric pressure converter with dynamic adjustment service voltage.
Background technology
Amplifier is the circuit unit of using always, yet the energy service efficiency of general amplifier is not high.Generally speaking, the energy via service voltage (supply voltage) is provided can also can not come to be wasted and have many energy according to the required output signal of input signal output in order to driving amplifier fully.
In view of this, the starting point of the present invention, promptly be to propose a kind of amplifying circuit, can be according to the signal that inputs or outputs of amplifier, utilize one to switch the service voltage that capacitance voltage transducer (switched-capacitorvoltage converter) is dynamically adjusted amplifier, to improve the energy service efficiency.
Summary of the invention
One of purpose of the present invention provides a kind of amplifying circuit that can dynamically adjust service voltage, and it comprises an amplifier and and switches the capacitance voltage transducer.This switch-capacitor electric pressure converter is coupled to amplifier, can be according to the output signal of amplifier or the input signal service voltage in order to dynamic adjustment amplifier.
In a preferred embodiment, the size of this service voltage is adjusted in the changeable selection of switch-capacitor electric pressure converter.
In a preferred embodiment, amplifying circuit also comprises a control device, is coupled to an input or the output of amplifier, inputs or outputs signal in order to one of foundation amplifier, produce a controlling signal to the switch-capacitor electric pressure converter, make the switch-capacitor electric pressure converter adjust service voltage according to this.
Since the switch-capacitor electric pressure converter have circuit design simple, be swift in response, plurality of advantages such as with low cost, low electromagnetic interference (EMI) and energy conversion efficiency height own, thereby can make the amplifying circuit of the present invention can be at short notice, dynamically adjust service voltage, realize the purpose of the electric energy service efficiency of raising amplifying circuit.
Description of drawings
Fig. 1 is the preferred embodiment calcspar of amplifying circuit of the present invention.
Fig. 2 is the circuit diagram of an embodiment of the switch-capacitor electric pressure converter of Fig. 1.
Fig. 3 A, B and C are the simplified electrical circuit diagram of switch-capacitor electric pressure converter when the different gains value of Fig. 2.
Fig. 4 is another preferred embodiment calcspar of amplifying circuit of the present invention.
The drawing reference numeral explanation:
1,4: amplifying circuit 10: amplifier
11,11a: switch-capacitor electric pressure converter
12: control device 121: peak detector
122: voltage sensor 123: gain control unit
Embodiment
For making further understanding and approval are arranged, now be described with reference to the accompanying drawings for the present invention.
Fig. 1 is the preferred embodiment calcspar of amplifying circuit of the present invention.As shown in Figure 1, amplifying circuit 1 comprises an amplifier 10, a switching capacitance voltage transducer 11 and a control device 12.Switch-capacitor electric pressure converter 11 is coupled to amplifier 10, can be with a voltage source V of being accepted Dd, be converted to service voltage and deliver to amplifier 10.If the gain of switch-capacitor electric pressure converter 11 is G, then service voltage is G*V Dd, as shown in the figure.Switch-capacitor electric pressure converter 11 also can dynamically be adjusted its yield value G according to a controlling signal, hereinafter can do illustrating in greater detail to this.
Control device 12 can produce this controlling signal to switch-capacitor electric pressure converter 11 according to an output signal of amplifier 10.In the embodiment in figure 1, control device 12 comprises a peak detector (peakdetector) 121, a voltage sensor (voltage level sensor) 122 and one gain control unit (gain control unit) 123.Peak detector 121 is coupled to an output of amplifier 10, in order to an output voltage peak value of detecting amplifier 10.Voltage sensor 122 is coupled to peak detector 121, has a plurality of voltage ranges, and according to peak detector 121 detected output voltage peak values, choose these voltage ranges one of them.123 of gain control units produce this controlling signal and deliver to switch-capacitor electric pressure converter 11 according to the selected voltage range of voltage sensor 122.Wherein, the operation principle of peak detector 121, voltage sensor 122 and gain control unit 123 and hardware execution mode are those skilled in the art to be known, and no longer describes in detail in this manual.
As previously mentioned, switch-capacitor electric pressure converter 11 is dynamically adjusted yield value according to controlling signal, so that different service voltages to be provided.In fact, switch-capacitor electric pressure converter 11 utilizes the specific configuration that couples of electric capacity and switch, and can have a plurality of yield values, and it can be expressed as the form of M/N usually, and M and N are integer.By the switching of switch, switch-capacitor electric pressure converter 11 is switched between these yield values.
Fig. 2 is the circuit diagram of an embodiment of switch-capacitor electric pressure converter 11.As shown in Figure 2, switch-capacitor electric pressure converter 11a comprises capacitor C 1, C 2And switch S 1To S 10, and the voltage (being the X point voltage) of input is V Dd, the output voltage after the conversion (being the Y point voltage) is G*V Dd, G is a yield value.In running, one group of switch S 1With S 2Be conducting (ON)/(OFF) state that opens circuit according to one first clock signal, and another group switch S 3With S 4Then be the ON/OFF state according to a second clock signal, and the not conducting simultaneously of these two groups of switches.
The switch-capacitor electric pressure converter 11a of Fig. 2 has three yield values 1,0.5 and-1, and by diverter switch S 5To S 10, can adjust corresponding yield value.The corresponding relation of switch switching mode and yield value, as described below:
(1) if S 5, S 6And S 9Be ON, S 7, S 8And S 10Be OFF, then Fig. 2 can be reduced to the circuit shown in Fig. 3 A.Work as S 1With S 2(S3 and S4 are for opening circuit) can make capacitor C during conducting 1Voltage become V DdAnd work as S 3With S 4(S during conducting 1With S 2For opening circuit), C 1Voltage V DdCan be transferred to capacitor C 2, and the voltage that X is ordered is V Dd, so yield value G=1.
(2) if S 6, S 8And S 9Be ON, S 5, S 7And S 10Be OFF, then Fig. 2 can be reduced to the circuit of Fig. 3 B.Work as S 1With S 2During conducting, can make C 1Voltage become V Dd* (1-G) (being the voltage difference between X and Y); And work as S 3With S 4During conducting, C 1Voltage V Dd* (1-G) can be transferred to C 2, the voltage that X is ordered is V Dd* G, that is
V dd*G＝V dd*(1-G)
Thus, can push away G=0.5.
(3) if S 5, S 7And S 10Be ON, S 6, S 8And S 9Be OFF, then Fig. 2 can be reduced to the circuit of Fig. 3 C.Work as S 1With S 2During conducting, can make C 1Voltage become V DdAnd work as S 3With S 4During conducting, C 1Voltage V DdCan be transferred to C 2, and the voltage that X is ordered is-V Dd, so G=-1.
Certainly, those skilled in the art all can be according to required yield value, and designs corresponding switch-capacitor electric pressure converter.As long as on using, utilize the switch-capacitor electric pressure converter to reach the purpose of dynamic adjustment amplifier service voltage, neither disengaging the spirit and scope of the present invention.
Fig. 4 is another preferred embodiment calcspar of amplifying circuit of the present invention.Compare with the embodiment of Fig. 1, the assembly that amplifying circuit 4 is comprised is identical with amplifying circuit 1, and difference only is that control device 12 is the outputs that are coupled to amplifier 10 among Fig. 1, and control device 12 then is coupled to the input of amplifier 10 among Fig. 4.In other words, among Fig. 4, control device 12 is the input signals according to amplifier 10, produces controlling signal to switch-capacitor electric pressure converter 11.Particularly, an input voltage peak value of peak detector 121 detecting amplifiers 10 in the control device 12 is to send into voltage sensor 122.The running of the remainder of amplifying circuit 4, then identical with aforesaid amplifying circuit 1, do not give unnecessary details now.
The above is to utilize preferred embodiment to describe the present invention in detail, but not limits the scope of the invention.Those skilled in the art all can understand, suitable some changes and the adjustment done will be within the protection ranges of claim of the present invention.

Claims (6)

1.一种可动态调整供给电压的放大电路，包含：1. An amplifying circuit capable of dynamically adjusting a supply voltage, comprising: 一放大器，用以藉由一供给电压，接收一输入讯号并输出一输出讯号；以及an amplifier for receiving an input signal and outputting an output signal via a supply voltage; and 一供给电压调整电路，耦接至该放大器，用以动态调整该放大器的该供给电压。A supply voltage adjustment circuit, coupled to the amplifier, is used for dynamically adjusting the supply voltage of the amplifier. 2.如权利要求1所述的放大电路，其中该供给电压调整电路包括一切换电容电压转换器。2. The amplifying circuit as claimed in claim 1, wherein the supply voltage adjustment circuit comprises a switched capacitor voltage converter. 3.如权利要求2所述的放大电路，其中该切换电容电压转换器用以依据一输入电压输出该供给电压，并且该切换电容电压转换器可切换选择该供给电压相对于该输入电压的增益。3. The amplifying circuit as claimed in claim 2, wherein the switched capacitor voltage converter is used to output the supply voltage according to an input voltage, and the switched capacitor voltage converter is switchable to select a gain of the supply voltage relative to the input voltage. 4.如权利要求3所述的放大电路，其中该切换电容电压转换器还包括：4. The amplifying circuit as claimed in claim 3, wherein the switched capacitor voltage converter further comprises: 一输入端，用以接收该输入电压；an input terminal for receiving the input voltage; 一输出端，用以输出该供给电压；an output terminal for outputting the supply voltage; 多个电容，分别与该输入端及该输出端耦接；以及a plurality of capacitors, respectively coupled to the input terminal and the output terminal; and 多个开关，其中，每该开关分别与该输入端、该输出端及这些电容的至少一个直接耦接；a plurality of switches, wherein each switch is directly coupled to the input terminal, the output terminal and at least one of the capacitors; 其中，藉由控制每该开关的切换，使得该供给电压相对于该输入电压具有一增益。Wherein, by controlling switching of each switch, the supply voltage has a gain relative to the input voltage. 5.如权利要求1所述的放大电路，其中还包含一控制装置，耦接于该放大器，用以依据该放大器的该输入讯号及该输出讯号的至少一个，产生一控制讯号控制该供给电压调整电路。5. The amplifying circuit as claimed in claim 1, further comprising a control device coupled to the amplifier for generating a control signal to control the supply voltage according to at least one of the input signal and the output signal of the amplifier Adjust the circuit. 6.如权利要求5所述的放大电路，其中该控制装置包含：6. The amplifying circuit as claimed in claim 5, wherein the control device comprises: 一峰值检测器，用以检测该放大器的该输入讯号及该输出讯号的至少一个的一电压峰值；a peak detector for detecting a voltage peak of at least one of the input signal and the output signal of the amplifier; 一电压传感器，耦接至该峰值检测器，用以感测该电压峰值的大小；以及a voltage sensor, coupled to the peak detector, for sensing the magnitude of the voltage peak; and 一增益控制单元，依据该电压传感器的感测结果输出该控制讯号。A gain control unit outputs the control signal according to the sensing result of the voltage sensor.
CN 200410057906 2004-08-26 2004-08-26 Amplifying circuit that can dynamically adjust the supply voltage Expired - Lifetime CN1741375B (en)

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Application Number Priority Date Filing Date Title
CN 200410057906 CN1741375B (en) 2004-08-26 2004-08-26 Amplifying circuit that can dynamically adjust the supply voltage

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CN1741375A true CN1741375A (en) 2006-03-01
CN1741375B CN1741375B (en) 2010-10-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102608166A (en) * 2011-01-20 2012-07-25 福特环球技术公司 Particle sensor, exhaust system and method for determining particles in the exhaust gas
WO2019019058A1 (en) * 2017-07-26 2019-01-31 深圳市汇顶科技股份有限公司 Dynamic amplifying circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3870475D1 (en) * 1987-02-20 1992-06-04 Victor Company Of Japan SOUND FREQUENCY AMPLIFIER.
CN1059767C (en) * 1995-07-07 2000-12-20 沙占起 Power amplifier circuit
AU732076B2 (en) * 1997-01-27 2001-04-12 Qualcomm Incorporated High dynamic range variable gain amplifier
US6639471B2 (en) * 2001-04-16 2003-10-28 Matsushita Electric Industrial Co., Ltd. Power amplifier circuit, control method for power amplifier circuit, and portable terminal apparatus for mobile communication
US6624702B1 (en) * 2002-04-05 2003-09-23 Rf Micro Devices, Inc. Automatic Vcc control for optimum power amplifier efficiency

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102608166A (en) * 2011-01-20 2012-07-25 福特环球技术公司 Particle sensor, exhaust system and method for determining particles in the exhaust gas
WO2019019058A1 (en) * 2017-07-26 2019-01-31 深圳市汇顶科技股份有限公司 Dynamic amplifying circuit
CN109643975A (en) * 2017-07-26 2019-04-16 深圳市汇顶科技股份有限公司 Dynamic amplifying circuit
US10476443B2 (en) 2017-07-26 2019-11-12 Shenzhen GOODIX Technology Co., Ltd. Dynamic amplification circuit
CN109643975B (en) * 2017-07-26 2023-06-16 深圳市汇顶科技股份有限公司 Dynamic amplifying circuit

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