CN105591640A - Electronic switching circuit and measuring instrument made by using circuit - Google Patents
Electronic switching circuit and measuring instrument made by using circuit Download PDFInfo
- Publication number
- CN105591640A CN105591640A CN201610119580.5A CN201610119580A CN105591640A CN 105591640 A CN105591640 A CN 105591640A CN 201610119580 A CN201610119580 A CN 201610119580A CN 105591640 A CN105591640 A CN 105591640A
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- Prior art keywords
- switching tube
- break
- tube
- switch
- switching circuit
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
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- Electronic Switches (AREA)
Abstract
The present invention discloses an electronic switching circuit which comprises a first switch tube, a second switch tube, a third switch tube, and a bias resistor, and the switch tubes are low conduction voltage drop switch tubes. The first on-off end of the first switch tube and the first on-off end of the second switch tube are connected to one end of the bias resistor. The control end of the first switch tube and the control end of the second swtich tube are connected to the other end of the bias resistor and are connected to the first on-off end of the third switch tube. The second on-off end of the third switch tube is connected to the ground. The second on-off end of the first switch tube is used as the input end of the electronic switching circuit, and the second on-off end of the second switch tube is used as the output end of an electronic switch. The control end of the third switch tube is used as the control end of the electronic switch. The invention also provides a measuring instrument made by applying the electronic switching circuit. The invention provides the electronic switching circuit and the measuring instrument, the control si simple, the control input impedance is high, the conduction voltage drop is low, the power consumption is low, the dual conduction is achieved, and the current intrusion can be prevented in turn-off.
Description
Technical field
The measuring instrument that the present invention is specifically related to a kind of electronic switching circuit and makes with this circuit.
Background technology
Along with the rise of Power Electronic Technique and universal, electronic switching device is being played the part of very important status in field of power electronics.
Generally speaking, electronic switch is all using metal-oxide-semiconductor or triode as switching tube, in the time using metal-oxide-semiconductor to set up electronic switch, the parasitic diode of the existence between metal-oxide-semiconductor source electrode and drain electrode, causes in the time that switch turn-offs, and electric current can oppositely pour in down a chimney from this, for head it off, general settling mode is that the diode of connecting on switch loop prevents reverse reverse irrigated current, but the result of thereupon bringing is to have produced larger voltage drop, cannot meet the demands in a lot of application scenarios. And set up electronic switch with triode, and because triode is current control device, it is larger that it controls required power consumption, and also there is certain pressure drop in PN junction simultaneously, is difficult to meet the requirement of low-power consumption.
Summary of the invention
One of object of the present invention be to provide a kind of low in energy consumption, pressure drop is little can prevent the electronic switching circuit that electric current pours in down a chimney.
Two of object of the present invention is to provide a kind of measuring instrument that described electronic switching circuit is made of applying.
This electronic switching circuit provided by the invention, comprises the first switching tube, second switch pipe, the 3rd switching tube and biasing resistor, and the first switching tube, second switch pipe and the 3rd switching tube are the switching tube of low conduction voltage drop; The first break-make end of the first switching tube and the first break-make end of second switch pipe are all connected with one end of biasing resistor; The control end of the control end of the first switching tube and second switch pipe is all connected with the biasing resistor other end, is also connected with the first break-make end of the 3rd switching tube simultaneously; The second break-make end of the 3rd switching tube is connected with ground; The second break-make end of the first switching tube is as the input of described electronic switching circuit, and the second break-make end of second switch pipe is as the output of described electronic switch; The control end of the 3rd switching tube is as the control end of described electronic switch.
Described the first switching tube, second switch pipe and the 3rd switching tube are metal-oxide-semiconductor.
The first described switching tube and second switch pipe are P channel MOS tube, the 3rd switching tube is N-channel MOS pipe, and the first break-make end of the first switching tube is source electrode, the second break-make end of the first switching tube is drain electrode, the control end of the first switching tube is grid, the first break-make end of second switch pipe is source electrode, the second break-make end of second switch pipe is drain electrode, the control end of second switch pipe is grid, the first break-make end of the 3rd switching tube is drain electrode, the second break-make end of the 3rd switching tube is source electrode, and the control end of the 3rd switching tube is grid.
The present invention also provides a kind of measuring instrument that described electronic switching circuit is made of applying, and this measuring instrument comprises described electronic switching circuit.
This electronic switching circuit provided by the invention, owing to having adopted, two switching tubes are arranged symmetrically with, the circuit arrangement of an additional gauge tap pipe and a biasing resistor, therefore this electronic switching circuit entirety of the present invention is for outside or three ports of ordinary electronic switch or four port controlling patterns, and versatility and practicality are very good; Because two switching tubes are arranged symmetrically with, therefore described electronic switching circuit can two-way admittance; Owing to having adopted the switching tube of low conduction voltage drop and biasing resistor as combinational circuit, therefore electronic switching circuit input impedance of the present invention is high, under conduction voltage drop, low in energy consumption, and can effectively prevent that electric current from pouring in down a chimney while turn-offing. The present invention also provides the measuring instrument of applying described electronic switching circuit, owing to having adopted described electronic switching circuit, therefore measuring instrument provided by the invention in the time of the control of electronic switch same control convenient, and the same input impedance of electronic switching circuit is high, under conduction voltage drop, low in energy consumption, two-way single-pass and anti-electric current pour in down a chimney.
Brief description of the drawings
Fig. 1 is the functional block diagram of electronic switching circuit of the present invention.
Fig. 2 is the circuit theory diagrams of a kind of embodiment of electronic switching circuit of the present invention.
Detailed description of the invention
Be illustrated in figure 1 the functional block diagram of electronic switching circuit of the present invention: this electronic switching circuit provided by the invention, comprise the first switching tube, second switch pipe, the 3rd switching tube and biasing resistor, and the first switching tube, second switch pipe and the 3rd switching tube are the switching tube of low conduction voltage drop; The first break-make end of the first switching tube and the first break-make end of second switch pipe are all connected with one end of biasing resistor; The control end of the control end of the first switching tube and second switch pipe is all connected with the biasing resistor other end, is also connected with the first break-make end of the 3rd switching tube simultaneously; The second break-make end of the 3rd switching tube is connected with ground; The second break-make end of the first switching tube is as the input of described electronic switching circuit, and the second break-make end of second switch pipe is as the output of described electronic switch; The control end of the 3rd switching tube is as the control end of described electronic switch.
The described pipe that opens the light is for metal-oxide-semiconductor.
Be illustrated in figure 2 the circuit theory diagrams of a kind of embodiment of electronic switching circuit of the present invention: in this embodiment, electronic switching circuit is made up of a P channel MOS tube (indicating V1 in figure), the 2nd P channel MOS tube (indicating V2 in figure), N-channel MOS pipe (indicating V3 in figure) and biasing resistor (indicating R1 in figure). The source electrode of a described P channel MOS tube, the 2nd P channel MOS tube is all connected with one end of described biasing resistor; The grid of a described P channel MOS tube, the 2nd P channel MOS tube is all connected with the described biasing resistor other end, is also connected with the leakage level of described N-channel MOS pipe simultaneously; N-channel MOS pipe source electrode is connected to the ground and connects; Above-described electronic switching circuit, input using the drain electrode of a P channel MOS tube as electronic switching circuit, output using the drain electrode of the 2nd P channel MOS tube as electronic switching circuit, the control end using the grid of N-channel MOS pipe as electronic switching circuit.
This electronic switching circuit, in the time of application, is considered as an integral device by described electronic switching circuit, externally has four pins, i.e. control end, input, output and ground.
The working method of described electronic switching circuit is:
1) in the time that the level of control end is low level, N-channel MOS pipe is in off state, be connected to biasing resistor two ends no-voltage between a P channel MOS tube and source electrode and the grid of the 2nd P channel MOS tube poor, therefore a P channel MOS tube and the 2nd P channel MOS tube all turn-off. Because P channel MOS tube exists parasitic diode, therefore the source electrode of a P channel MOS tube and drain electrode are bypassed conducting, the 2nd not conducting of P channel MOS tube, and switch entirety, in off state, can prevent that electric current from pouring in down a chimney;
2) in the time that the level of control end is high level, N-channel MOS pipe is in conducting state, therefore the grid voltage of a P channel MOS tube and the 2nd P channel MOS tube is dragged down, there is voltage difference in the biasing resistor two ends that are connected between a P channel MOS tube and source electrode and the grid of the 2nd P channel MOS tube, and voltage difference is enough to open a P channel MOS tube and the 2nd P channel MOS tube, therefore the source electrode of a P channel MOS tube and the 2nd P channel MOS tube and the equal conducting of drain electrode, switch entirety is in conducting state. Because a P channel MOS tube and the 2nd P channel MOS tube are mirror-image arrangement, therefore this circuit can two-way admittance.
Claims (4)
1. an electronic switching circuit, is characterized in that comprising the first switching tube, second switch pipe, the 3rd switching tube and biasing resistor, and the first switching tube, second switch pipe and the 3rd switching tube are the switching tube of low conduction voltage drop; The first break-make end of the first switching tube and the first break-make end of second switch pipe are all connected with one end of biasing resistor; The control end of the control end of the first switching tube and second switch pipe is all connected with the biasing resistor other end, is also connected with the first break-make end of the 3rd switching tube simultaneously; The second break-make end of the 3rd switching tube is connected with ground; The second break-make end of the first switching tube is as the input of described electronic switching circuit, and the second break-make end of second switch pipe is as the output of described electronic switch; The control end of the 3rd switching tube is as the control end of described electronic switch.
2. a kind of electronic switching circuit according to claim 1, is characterized in that described the first switching tube, second switch pipe and the 3rd switching tube are metal-oxide-semiconductor.
3. a kind of electronic switching circuit according to claim 1, it is characterized in that described the first switching tube and second switch pipe are P channel MOS tube, the 3rd switching tube is N-channel MOS pipe, and the first break-make end of the first switching tube is source electrode, the second break-make end of the first switching tube is drain electrode, the control end of the first switching tube is grid, the first break-make end of second switch pipe is source electrode, the second break-make end of second switch pipe is drain electrode, the control end of second switch pipe is grid, the first break-make end of the 3rd switching tube is drain electrode, the second break-make end of the 3rd switching tube is source electrode, the control end of the 3rd switching tube is grid.
4. a measuring instrument, is characterized in that the electronic switching circuit that comprises that one of claim 1 ~ 3 is described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119580.5A CN105591640A (en) | 2016-03-03 | 2016-03-03 | Electronic switching circuit and measuring instrument made by using circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610119580.5A CN105591640A (en) | 2016-03-03 | 2016-03-03 | Electronic switching circuit and measuring instrument made by using circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105591640A true CN105591640A (en) | 2016-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610119580.5A Pending CN105591640A (en) | 2016-03-03 | 2016-03-03 | Electronic switching circuit and measuring instrument made by using circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105591640A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950894A (en) * | 2017-05-15 | 2017-07-14 | 江苏三恒科技股份有限公司 | A kind of colliery machine mining face jerk latch switch position identification device and recognition methods |
| CN109029676A (en) * | 2018-09-03 | 2018-12-18 | 厦门佰伦斯电子科技有限公司 | A kind of soft switch circuit applied on electronic scale |
| CN109802659A (en) * | 2019-01-17 | 2019-05-24 | 湖南进芯电子科技有限公司 | A kind of two-way low drain electric switch |
| CN112104347A (en) * | 2020-11-19 | 2020-12-18 | 成都梦马云创科技有限公司 | Signal analog switch |
| CN112636741A (en) * | 2020-12-29 | 2021-04-09 | 成都极米科技股份有限公司 | Level conversion circuit and terminal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6256182B1 (en) * | 1998-04-27 | 2001-07-03 | International Business Machines Corporation | Switch circuit and electronic apparatus with a discharge circuit |
| CN202334466U (en) * | 2011-12-09 | 2012-07-11 | 重庆电子工程职业学院 | Change-over switch circuit |
| CN205407768U (en) * | 2016-03-03 | 2016-07-27 | 长沙威胜信息技术有限公司 | Electronic switching circuit and metering device who makes with this circuit |
-
2016
- 2016-03-03 CN CN201610119580.5A patent/CN105591640A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6256182B1 (en) * | 1998-04-27 | 2001-07-03 | International Business Machines Corporation | Switch circuit and electronic apparatus with a discharge circuit |
| CN202334466U (en) * | 2011-12-09 | 2012-07-11 | 重庆电子工程职业学院 | Change-over switch circuit |
| CN205407768U (en) * | 2016-03-03 | 2016-07-27 | 长沙威胜信息技术有限公司 | Electronic switching circuit and metering device who makes with this circuit |
Non-Patent Citations (1)
| Title |
|---|
| ADAM: "Using MOSFETs As General Switches", 《HTTP://WWW.ELECTRONIC-PRODUCTS-DESIGN.COM/GEEK-AREA/ELECTRONICS/MOSFETS/USING-MOSFETS-AS-GENERAL-SWITCHES》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950894A (en) * | 2017-05-15 | 2017-07-14 | 江苏三恒科技股份有限公司 | A kind of colliery machine mining face jerk latch switch position identification device and recognition methods |
| CN109029676A (en) * | 2018-09-03 | 2018-12-18 | 厦门佰伦斯电子科技有限公司 | A kind of soft switch circuit applied on electronic scale |
| CN109802659A (en) * | 2019-01-17 | 2019-05-24 | 湖南进芯电子科技有限公司 | A kind of two-way low drain electric switch |
| CN112104347A (en) * | 2020-11-19 | 2020-12-18 | 成都梦马云创科技有限公司 | Signal analog switch |
| CN112636741A (en) * | 2020-12-29 | 2021-04-09 | 成都极米科技股份有限公司 | Level conversion circuit and terminal equipment |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160518 |
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| RJ01 | Rejection of invention patent application after publication |