CN102437843A - High Voltage Switching Circuit - Google Patents
High Voltage Switching Circuit Download PDFInfo
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- CN102437843A CN102437843A CN2011103907163A CN201110390716A CN102437843A CN 102437843 A CN102437843 A CN 102437843A CN 2011103907163 A CN2011103907163 A CN 2011103907163A CN 201110390716 A CN201110390716 A CN 201110390716A CN 102437843 A CN102437843 A CN 102437843A
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- 230000007423 decrease Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 abstract description 10
- 230000033228 biological regulation Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000009711 regulatory function Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 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, and needs 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:
The transmission branch road; Comprise first switching tube of first switchtype and the second switch pipe of second switch type; Wherein the input of first switching tube is the input of said high voltage switching circuit; First output end of switching tube is connected to the input of second switch pipe, and the second switch pipe is output as the output of said high voltage switching circuit;
The switch controlled branch road; Comprise first resistor, second resistor and voltage-controlled current source; Wherein an end of first resistor is connected to the input of first switching tube, and its other end is connected to an end of second resistor, and the electric current that the other end of second resistor is connected to voltage-controlled current source flows into end; And the connected node of first resistor and second resistor is connected first control end of switching tube, and the connected node of second resistor and voltage-controlled current source is connected the control end of second switch pipe; And
Voltage is provided with 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 first output end of switching tube.
The high voltage switching circuit that embodiments of the invention provide realized Adjustable Output Voltage joint and two kinds of functions of switch, and the output voltage of circuit can linear regulation.
Description of drawings
Through reading the detailed description of doing with reference to following accompanying drawing that non-limiting example is done, it is more obvious that other features, objects and advantages of the present invention will become, wherein:
Fig. 1 example description high voltage switching circuit according to an embodiment of the invention.
Fig. 2 example description when the electric current through control voltage control voltage-controlled current source changes, the change in voltage of different nodes in output voltage and the circuit.
Fig. 3 example description the formation of voltage-controlled current source according to an embodiment of the invention.
Same or analogous Reference numeral is represented same or analogous parts in the accompanying drawing.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiments of the invention are described in detail below.
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
Disclosing of hereinafter provides many various embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the 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 various embodiment that discuss of institute and/or the setting.In addition, the example that the various particular device that the invention provides are 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 the not necessarily drafting in proportion of illustrated in the accompanying drawings parts.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:
The transmission branch road; Comprise the first switching tube PM0 of 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 said 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 said high voltage switching circuit;
The switch controlled branch road; Comprise first resistor R 1, second resistor R 2 and the voltage-controlled current source VCCS that are connected in series; Wherein an end of first resistor R 1 is connected to the input of the first switching tube PM0; Its other end is connected to an end of second resistor R 2; The electric current that the other end of second resistor R 2 is connected to voltage-controlled current source flows into end, and first resistor R 1 is connected the control end of the first switching tube PM0 with the connected node C of second resistor R 2, and second resistor R 2 is connected the control end of second switch pipe NM1 with the connected node B of voltage-controlled current source VCCS; And
Voltage is provided with 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 said first kind is PMOS or positive-negative-positive triode, and the second switch pipe NM1 of said second type is NMOS or NPN type triode.
In one embodiment; The sense of current of said 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 said electric current zero between first current threshold time, the said first switching tube PM0 closes; When current amplitude surpasses the first current threshold I1; The said first switching tube PM0 opens, and when current amplitude surpassed the second current threshold I2, the output voltage of said high voltage switching circuit increased and linear decline with current amplitude.
In one embodiment, said 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; Said voltage-controlled current source VCCS is made up 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), and the grid of a 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 terminal 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.
Specifically describe high voltage switching circuit below according to the band regulatory function of the embodiment of the invention.The high voltage switching circuit of present embodiment comprises that PMOS pipe PM0 (is also referred to as first switching tube in the literary composition; Can substitute by the positive-negative-positive triode), clamper NMOS pipe NM0 (is also referred to as the diode characteristic element in the literary composition; Can substitute by NPN type triode or diode), resistor R 1 and R2, low threshold value NMOS pipe NM1 (be also referred to as the second switch pipe in the literary composition, can substitute) and voltage-controlled current source VCCS by NPN type triode.Annexation between the element sees invention Fig. 1 for details.
As shown in Figure 1, this circuit is made up of six parts:
The source end and input HV of PM0 (can substitute) 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 (possibly also NM0 is called the diode characteristic element in the literary composition; The positive pole that is equivalent to diode on 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 receives V
CtrlSignal controlling.
The general function of circuit is 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 through NM1.When electric current increased to I1, it just made PM0 and the equal conducting of NM1, HV
InBe transferred to the A point through PM0 (can substitute) earlier, and then be transferred to output HV through NM1 by the positive-negative-positive triode
OutWhen electric current increased from I1 to I2, the level of output was elevated to maximum Vmax from V0, and circuit has been accomplished 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 being zero, and then realized the linear regulation of output end voltage and the pass closed procedure of circuit.
As shown in Figure 3, in the above-described embodiments, the voltage-controlled current source VCCS among Fig. 2 can be made up 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, like 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 under the situation that does 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 accompanying claims rather than above-mentioned explanation, therefore is intended to the implication of the equivalents that drops on claim and all changes in the scope are included in the present invention.Should any Reference numeral in the claim be regarded as limit related claim.In addition, obviously other modules or step do not got rid of in " comprising " speech, and odd number is not got rid of plural number.
Claims (5)
1. a high voltage switching circuit is characterized in that, comprising:
The transmission branch road; Comprise first switching tube of first switchtype and the second switch pipe of second switch type; Wherein the input of first switching tube is the input of said high voltage switching circuit; First output end of switching tube is connected to the input of second switch pipe, and the second switch pipe is output as the output of said high voltage switching circuit;
The switch controlled branch road; Comprise first resistor, second resistor and voltage-controlled current source; Wherein an end of first resistor is connected to the input of first switching tube, and its other end is connected to an end of second resistor, and the electric current that the other end of second resistor is connected to voltage-controlled current source flows into end; And the connected node of first resistor and second resistor is connected first control end of switching tube, and the connected node of second resistor and voltage-controlled current source is connected the control end of second switch pipe; And
Voltage is provided with 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 first output end of switching tube.
2. circuit according to claim 1 is characterized in that: first switching tube of the wherein said first kind is PMOS or positive-negative-positive triode, and the second switch pipe of said 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 said voltage-controlled current source from electric current; And when the amplitude of the said electric current of said voltage-controlled current source zero between first current threshold time; Said first switching tube is closed, and when current amplitude surpassed first current threshold, said first switching tube was opened; When current amplitude surpassed second current threshold, the output voltage of said 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 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.
5. circuit according to claim 1; It is characterized in that: wherein said voltage-controlled current source is made up 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, and the grid of a NMOS connects bias voltage, the source ground of the 2nd NMOS; The grid of the 2nd NMOS is the control voltage input terminal 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 true CN102437843A (en) | 2012-05-02 |
| CN102437843B CN102437843B (en) | 2013-10-16 |
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| CN 201110390716 Active CN102437843B (en) | 2011-11-30 | 2011-11-30 | High Voltage Switching Circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104285155A (en) * | 2012-05-10 | 2015-01-14 | 桑迪士克科技股份有限公司 | Apparatus and method for high voltage switches |
| CN105827224A (en) * | 2016-03-16 | 2016-08-03 | 中国科学院上海微系统与信息技术研究所 | High-voltage analog 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 |
| CN106160717A (en) * | 2015-04-03 | 2016-11-23 | 飞思卡尔半导体公司 | Transmission gate circuit |
| CN109150141A (en) * | 2018-10-23 | 2019-01-04 | 上海艾为电子技术股份有限公司 | A kind of analog switching circuit and its method of controlling switch and device |
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| JPH06107967A (en) * | 1992-09-30 | 1994-04-19 | Nippon Oil & Fats Co Ltd | Thermosetting type anti-fogging agent composition for light tool of automobile and light tool of automobil |
| 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 |
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2011
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104285155A (en) * | 2012-05-10 | 2015-01-14 | 桑迪士克科技股份有限公司 | Apparatus and method for high voltage switches |
| CN104285155B (en) * | 2012-05-10 | 2017-06-30 | 桑迪士克科技有限责任公司 | For the apparatus and method of high-voltage switch |
| CN106160717A (en) * | 2015-04-03 | 2016-11-23 | 飞思卡尔半导体公司 | Transmission gate circuit |
| CN106160717B (en) * | 2015-04-03 | 2020-08-18 | 恩智浦美国有限公司 | Transmission gate circuit |
| CN105827224A (en) * | 2016-03-16 | 2016-08-03 | 中国科学院上海微系统与信息技术研究所 | High-voltage analog 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 |
| CN109150141A (en) * | 2018-10-23 | 2019-01-04 | 上海艾为电子技术股份有限公司 | A kind of analog switching circuit and its method of controlling switch and device |
| 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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| Publication number | Publication date |
|---|---|
| CN102437843B (en) | 2013-10-16 |
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