CN102437843B - High Voltage Switching Circuit - Google Patents
High Voltage Switching Circuit Download PDFInfo
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- CN102437843B CN102437843B CN 201110390716 CN201110390716A CN102437843B CN 102437843 B CN102437843 B CN 102437843B CN 201110390716 CN201110390716 CN 201110390716 CN 201110390716 A CN201110390716 A CN 201110390716A CN 102437843 B CN102437843 B CN 102437843B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 abstract description 10
- 230000033228 biological regulation Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000009711 regulatory function Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
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Abstract
The embodiment of the invention provides a high-voltage switching circuit, which realizes two functions of output voltage regulation and switching, and the output voltage of the circuit can be linearly regulated. The circuit generally includes a transmission branch; the switch tube controls the branch; and a voltage setting branch.
Description
Technical field
The present invention relates to integrated circuit fields, relate in particular to a kind of high voltage switching circuit with regulatory function.
Background technology
The conventional high-tension switching circuit has been realized high-voltage switch, and its output voltage is a fixed value, can't be directly adjusted.This causes needing to add the output level that extra level control circuit comes the by-pass cock circuit in side circuit.
Summary of the invention
Main purpose of the present invention provides a kind of high voltage switching circuit with regulatory function.
In one aspect, the invention provides a kind of high voltage switching circuit, comprising:
Transmission branch, comprise the first switching tube of the first switchtype and the second switch pipe of second switch type, wherein the input of the first switching tube is the input of described high voltage switching circuit, the output of the first switching tube is connected to the input of second switch pipe, and the second switch pipe is output as the output of described high voltage switching circuit;
The switch controlled branch road, comprise the first resistor, the second resistor and voltage-controlled current source, wherein an end of the first resistor is connected to the input of the first switching tube, its other end is connected to an end of the second resistor, the electric current that the other end of the second resistor is connected to voltage-controlled current source flows into end, and the first resistor be connected the connected node of resistor and connect the control end of the first switching tube, the second resistor is connected connected node and is connected the control end of second switch pipe with voltage-controlled current source; And
Voltage arranges branch road, comprises the diode characteristic element, and the positive pole on its function is connected to supply voltage, and the negative pole on its function is connected to the output of the first switching tube.
The high voltage switching circuit that embodiments of the invention provide realized that output voltage can regulate and two kinds of functions of switch, and the output voltage of circuit can linear regulation.
Description of drawings
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become, wherein:
Fig. 1 example has illustrated according to an embodiment of the invention high voltage switching circuit.
Fig. 2 example has illustrated when passing through the curent change of control voltage control voltage-controlled current source, the change in voltage of different nodes in output voltage and the circuit.
Fig. 3 example has illustrated the formation of voltage-controlled current source according to an embodiment of the invention.
Same or analogous Reference numeral represents same or analogous parts in the accompanying drawing.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing embodiments of the invention are described in detail.
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing hereinafter provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter parts and the setting of specific examples are described.Certainly, they only are example, and purpose does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and purpose clearly, itself not indicate the relation between the various embodiment that discuss of institute and/or the setting.In addition, the example that the various specific device that the invention provides is connected with circuit, but those of ordinary skills can recognize the property of can be applicable to that other devices are connected with circuit.Should be noted that illustrated parts are not necessarily drawn in proportion in the accompanying drawings.The present invention has omitted description to known assemblies and circuit to avoid unnecessarily limiting the present invention.
With reference to Fig. 1 and Fig. 3, embodiments of the invention provide a kind of high voltage switching circuit, comprising:
Transmission branch, comprise the first switching tube PM0 of the first switchtype and the second switch pipe NM1 of second switch type, wherein the input of the first switching tube PM0 is the input HVin of described high voltage switching circuit, the output terminals A of the first switching tube PM0 is connected to the input of second switch pipe NM1, and the output of second switch pipe NM1 is the output HVout of described high voltage switching circuit;
The switch controlled branch road, comprise the first resistor R1, the second resistor R2 and the voltage-controlled current source VCCS that are connected in series, wherein the end of the first resistor R1 is connected to the input of the first switching tube PM0, its other end is connected to the end of the second resistor R2, the electric current that the other end of the second resistor R2 is connected to voltage-controlled current source flows into end, and the first resistor R1 be connected the connected node C of resistor R2 and connect the control end of the first switching tube PM0, the second resistor R2 is connected connected node B and is connected the control end of second switch pipe NM1 with voltage-controlled current source VCCS; And
Voltage arranges branch road, comprises diode characteristic element NM0, and the positive pole on its function is connected to supply voltage VDD, and the negative pole on its function is connected to the output of the first switching tube PM0.
In one embodiment, the first switching tube PM0 of the described first kind is PMOS or positive-negative-positive triode, and the second switch pipe NM1 of described Second Type is NMOS or NPN type triode.
In one embodiment, the sense of current of described voltage-controlled current source VCCS is for flowing into the inside that end flows to voltage-controlled current source VCCS from electric current, and when the amplitude of described electric current zero between the first current threshold the time, described the first switching tube PM0 closes, when current amplitude surpasses the first current threshold I1, described the first switching tube PM0 opens, and when current amplitude surpassed the second current threshold I2, the output voltage of described high voltage switching circuit increased and linear decline with current amplitude.
In one embodiment, described diode characteristic element NM0 is that grid and the NMOS that is connected of drain electrode manage, diode, perhaps the NPN triode that is connected with collector electrode of base stage.
In one embodiment, described voltage-controlled current source VCCS is made of two NMOS that are connected in series (NM3 and NM2), wherein the source electrode of a NMOS (NM3) is connected to the drain electrode of the 2nd NMOS (NM2), the grid of the one NMOS (NM3) meets bias voltage Vbias, the source ground of the 2nd NMOS (NM2), the grid of the 2nd NMOS (NM2) is the control voltage input end Vctrl of voltage-controlled current source VCCS, and the drain electrode of a NMOS (NM3) is that the electric current of voltage-controlled current source VCCS flows into end.
The below specifically describes the high voltage switching circuit with regulatory function according to the embodiment of the invention.The high voltage switching circuit of the present embodiment comprises that PMOS pipe PM0 (is also referred to as the first switching tube in the literary composition, can be substituted by the positive-negative-positive triode), clamper NMOS pipe NM0 (is also referred to as the diode characteristic element in the literary composition, can be substituted by NPN type triode or diode), resistor R1 and R2, low threshold value NMOS pipe NM1 (be also referred to as the second switch pipe in the literary composition, can be substituted by NPN type triode) and voltage-controlled current source VCCS.Annexation between the element sees invention Fig. 1 for details.
As shown in Figure 1, this circuit is comprised of six parts:
The source and input HV of PM0 (can be substituted by the positive-negative-positive triode)
InBe connected.When this pipe conducting, the high level signal of input can losslessly be transferred to the A point.
The grid end of NM0 (can be substituted by NPN type triode or diode) is connected with drain terminal, the level that NM0 under this diode connected mode (can be substituted by NPN type triode or diode) is ordered to A carries out set and (may also NM0 be called the diode characteristic element in the literary composition, the positive pole that is equivalent to diode on the grid end that it is connected and the drain terminal function, be called the positive pole on the function in the literary composition, its source electrode then is equivalent to the negative pole of diode, is called the negative pole on the function in the literary composition).
NM1 is a low threshold value device, and the high level signal that it orders A is transferred to output, and its grid end (being the B point) is connected with the output of VCCS.
Voltage-controlled current source VCCS is subjected to V
CtrlSignal controlling.
Resistor R1 and R2 are two resistors that are used for regulation output voltage.
The general function of circuit as shown in Figure 2.By V
CtrlThe controlled current flow I that control VCCS produces; When the value of electric current I is zero or when very little, the voltage approximately equal of the magnitude of voltage of PM0 grid end and the grid voltage value of NM1 and input, cause not conducting of PM0, NM1 conducting, and the current potential that A is ordered is set to V0 by NM0 (can be substituted by NPN type triode or diode), and then passes to output by NM1.When electric current increased to I1, it was just so that the equal conducting of PM0 and NM1, HV
InBe transferred to the A point by PM0 (can be substituted by the positive-negative-positive triode) first, and then be transferred to output HV by NM1
OutWhen electric current increased from I1 to I2, the level of output was elevated to maximum Vmax from V0, and circuit has been finished opening process.After this, along with the continuation increase of electric current I, because V
ThNM1Be the threshold voltage of NM1, this value is almost equal to zero, so the output end voltage value (is HV
Out=HV
In-I * (R1+R2)-V
ThNM1) linearity reduces until be zero, and then realized the linear regulation of output end voltage and the closing process of circuit.
As shown in Figure 3, in the above-described embodiments, the voltage-controlled current source VCCS among Fig. 2 can be comprised of two high pressure NMOS pipe NM3 (being also referred to as a NMOS in the literary composition) and NM2 (being also referred to as the 2nd NMOS in the literary composition).Vbias connects a fixed level, such as supply voltage VDD etc.; Vctrl is the control signal of current source.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and in the situation that do not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, therefore is intended to be included in the present invention dropping on the implication that is equal to important document of claim and all changes in the scope.Any Reference numeral in the claim should be considered as limit related claim.In addition, obviously other modules or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.
Claims (5)
1. a high voltage switching circuit is characterized in that, comprising:
Transmission branch, comprise the first switching tube of the first switchtype and the second switch pipe of second switch type, wherein the input of the first switching tube is the input of described high voltage switching circuit, the output of the first switching tube is connected to the input of second switch pipe, and the second switch pipe is output as the output of described high voltage switching circuit;
The switch controlled branch road, comprise the first resistor, the second resistor and voltage-controlled current source, wherein an end of the first resistor is connected to the input of the first switching tube, its other end is connected to an end of the second resistor, the electric current that the other end of the second resistor is connected to voltage-controlled current source flows into end, and the first resistor be connected the connected node of resistor and connect the control end of the first switching tube, the second resistor is connected connected node and is connected the control end of second switch pipe with voltage-controlled current source; And
Voltage arranges branch road, comprises the diode characteristic element, and the positive pole on its function is connected to supply voltage, and the negative pole on its function is connected to the output of the first switching tube.
2. circuit according to claim 1, it is characterized in that: the first switching tube of the wherein said first kind is PMOS or positive-negative-positive triode, the second switch pipe of described Second Type is NMOS or NPN type triode.
3. circuit according to claim 1 and 2, it is characterized in that: the sense of current of wherein said voltage-controlled current source is for flowing into the inside that end flows to described voltage-controlled current source from electric current, and when the amplitude of the described electric current of described voltage-controlled current source zero between the first current threshold the time, described the first switching tube is closed, when current amplitude surpasses the first current threshold, described the first switching tube is opened, when current amplitude surpassed the second current threshold, the output voltage of described high voltage switching circuit increased and linear decline with current amplitude.
4. circuit according to claim 1 is characterized in that: wherein said diode characteristic element is that the NMOS that grid and drain electrode are connected manages, diode, perhaps the NPN triode that is connected with collector electrode of base stage.
5. circuit according to claim 1, it is characterized in that: wherein said voltage-controlled current source is made of two NMOS that are connected in series, wherein the source electrode of a NMOS is connected to the drain electrode of the 2nd NMOS, the grid of the one NMOS connects bias voltage, the source ground of the 2nd NMOS, the grid of the 2nd NMOS is the control voltage input end of voltage-controlled current source, and the drain electrode of a NMOS is that the electric current of voltage-controlled current source flows into end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110390716 CN102437843B (en) | 2011-11-30 | 2011-11-30 | High Voltage Switching Circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110390716 CN102437843B (en) | 2011-11-30 | 2011-11-30 | High Voltage Switching Circuit |
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| CN102437843A CN102437843A (en) | 2012-05-02 |
| CN102437843B true CN102437843B (en) | 2013-10-16 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8884679B2 (en) * | 2012-05-10 | 2014-11-11 | Sandisk Technologies Inc. | Apparatus and method for high voltage switches |
| CN106160717B (en) * | 2015-04-03 | 2020-08-18 | 恩智浦美国有限公司 | Transmission gate circuit |
| CN105827224B (en) * | 2016-03-16 | 2018-09-25 | 中国科学院上海微系统与信息技术研究所 | A kind of high pressure simulation integrated switching circuit |
| CN105843309A (en) * | 2016-03-24 | 2016-08-10 | 天津理工大学 | High voltage switch control circuit based on current source |
| CN109150141B (en) * | 2018-10-23 | 2023-09-15 | 上海艾为电子技术股份有限公司 | Analog switch circuit and switch control method and device thereof |
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|---|---|---|---|---|
| TW518823B (en) * | 2000-12-15 | 2003-01-21 | Fairchild Semiconductor | Translating switch circuit with disabling option |
| CN1794581A (en) * | 2005-12-27 | 2006-06-28 | 中国科学院上海光学精密机械研究所 | High-speed high-voltage switch circuit |
| CN201345613Y (en) * | 2008-12-18 | 2009-11-11 | 比亚迪股份有限公司 | Voltage adjusting device for load starting |
| CN201918971U (en) * | 2011-02-11 | 2011-08-03 | 赵恩海 | Novel bidirectional analog switching circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS617967A (en) * | 1984-06-15 | 1986-01-14 | インタ−ナショナル ビジネス マシ−ンズ コ−ポレ−ション | I/o controller |
| JP3216262B2 (en) * | 1992-09-30 | 2001-10-09 | 日本油脂株式会社 | Heat-curable anti-fog composition for vehicle lighting and vehicle lighting |
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2011
- 2011-11-30 CN CN 201110390716 patent/CN102437843B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW518823B (en) * | 2000-12-15 | 2003-01-21 | Fairchild Semiconductor | Translating switch circuit with disabling option |
| CN1794581A (en) * | 2005-12-27 | 2006-06-28 | 中国科学院上海光学精密机械研究所 | High-speed high-voltage switch circuit |
| CN201345613Y (en) * | 2008-12-18 | 2009-11-11 | 比亚迪股份有限公司 | Voltage adjusting device for load starting |
| CN201918971U (en) * | 2011-02-11 | 2011-08-03 | 赵恩海 | Novel bidirectional analog switching circuit |
Non-Patent Citations (1)
| Title |
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| JP昭6-107967A 1985.06.13 |
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