CN203775031U - Power supply circuit and two-wire system electronic switching circuit using the power supply circuit - Google Patents
Power supply circuit and two-wire system electronic switching circuit using the power supply circuit Download PDFInfo
- Publication number
- CN203775031U CN203775031U CN201420093171.9U CN201420093171U CN203775031U CN 203775031 U CN203775031 U CN 203775031U CN 201420093171 U CN201420093171 U CN 201420093171U CN 203775031 U CN203775031 U CN 203775031U
- Authority
- CN
- China
- Prior art keywords
- transistor
- power supply
- output
- input
- link
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000003381 stabilizer Substances 0.000 claims description 18
- 230000005669 field effect Effects 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
A power supply circuit comprises a first transistor, a second transistor, a power supply output end connected with the output end of the first transistor, a first connection end, a second connection end, a stabilivolt whose positive electrode and negative electrode are connected with a first input end and a second connection end of the second transistor, and a voltage/current conversion circuit, wherein a first input end of the first transistor is connected with the output end of the second transistor while a second input end of the first transistor is connected with the first connection end; a first input end of the second transistor is connected with the first connection through the voltage/current conversion circuit while a second input end of the second transistor is also connected with the first connection end; and the positive electrode of the stabilivolt is connected to the ground. A two-wire system electronic switching circuit using the power supply circuit is also provided. Direct current input from the first connection end is amplified by two stages through the second transistor and the first transistor so as to obtain large current output from a power supply output end, and the stabilivolt enables voltage output from the power supply output end to be stable, thereby realizing strong power supply capabilities of the power supply output end.
Description
Technical field
The utility model relates to electronic circuit field, particularly relates to the two-wire electronic switch circuit of a kind of power supply circuits and these power supply circuits of use.
Background technology
The power supply circuits of traditional two-wire system electronic switch, adopt the mode of simple resistance step-down conventionally, and the mode of resistance step-down often power supply capacity is limited, cannot meet the work requirements of electronic switch.
Utility model content
Based on this, the two-wire electronic switch circuit that is necessary to provide the power supply circuits that a kind of power supply capacity is stronger and uses these power supply circuits.
Power supply circuits, comprising: the first transistor, transistor seconds, power supply output, the first link, voltage-stabiliser tube, the second link, baric flow change-over circuit,
The output of described the first transistor is connected with described power supply output, and the first input end of described the first transistor is connected with the output of described transistor seconds, and the second input of described the first transistor is connected with described the first link;
The first input end of described transistor seconds is connected with described the first link by described baric flow change-over circuit, the second input of described transistor seconds is connected with described the first link, the first input end of described transistor seconds is also connected with described the second link by described voltage-stabiliser tube, the positive pole of described voltage-stabiliser tube is connected with described the second link, negative pole is connected with the first input end of described transistor seconds, and the plus earth of described voltage-stabiliser tube.
In one of them embodiment, described the first transistor is triode,
The output of described the first transistor, first input end and the second input are respectively emitter, base stage and the collector electrode of described triode.
In one of them embodiment, described transistor seconds is triode,
The output of described transistor seconds, first input end and the second input are respectively emitter, base stage and the collector electrode of described triode.
In one of them embodiment, described the first transistor is field effect transistor,
The output of described the first transistor, first input end and the second input are respectively source electrode, grid and the drain electrode of described field effect transistor.
In one of them embodiment, described transistor seconds is field effect transistor,
The output of described transistor seconds, first input end and the second input are respectively source electrode, grid and the drain electrode of described field effect transistor.
In one of them embodiment, described baric flow change-over circuit is resistance,
The first input end of described transistor seconds is connected with described the first link by described resistance.
A two-wire electronic switch circuit, comprises the power supply circuits in above-mentioned any one embodiment, also comprises control unit,
Described control unit comprises: feeder ear, the zero line input for external zero line, the live wire input for external live wire, two power output ends;
Two described power output ends are connected with described the second link with described first link of described power supply circuits respectively, and the described power supply output of described power supply circuits is connected with the described feeder ear of described control unit.
The direct current of inputting from described the first link is via the two-stage amplification of described transistor seconds and described the first transistor, make from the larger electric current of described power supply output output, and described voltage-stabiliser tube makes the voltage of described power supply output output keep stable, thereby realized the stronger power supply capacity of described power supply output.
Accompanying drawing explanation
Fig. 1 is the structural representation of the power supply circuits of the utility model one preferred embodiment;
Fig. 2 is a kind of physical circuit figure of the power supply circuits shown in Fig. 1;
Fig. 3 is another physical circuit figure of the power supply circuits shown in Fig. 1;
Fig. 4 is the structural representation of the two-wire electronic switch external load of the utility model one preferred embodiment.
Embodiment
As shown in Figure 1, it is the structural representation of the power supply circuits 10 of the utility model one preferred embodiment, comprising: the first transistor 110, transistor seconds 120, the first link 130, voltage-stabiliser tube Z1, power supply output 140, the second link 150, baric flow change-over circuit 160.
Transistor is mainly divided into two large classes: bipolar transistor (BJT) and field-effect transistor (FET).
Transistor has three utmost points; Three utmost points of bipolar transistor, form emitter (Emitter), base stage (Base) and collector electrode (Collector) by N-type with P type respectively; Three utmost points of field-effect transistor are respectively source electrode (Source), grid (Gate) and drain electrode (Drain).
Transistor is because there are three kinds of polarity, so also there is the occupation mode of three kinds, be respectively grounded emitter (claim not only cascode amplifies, CE configuration), base earth (claim not only cobasis amplifies, CB configuration) and grounded collector (but also claiming to collect altogether amplification, CC configuration, emitter with corner device).
In bipolar transistor, emitter-base bandgap grading has very little electric current to base stage, can make emitter between collector electrode, produces large electric current; In being on the scene effect transistor, at grid, apply small voltage, control the electric current between source electrode and drain electrode.
The output of described the first transistor 110 is connected with described power supply output 140, the first input end of described the first transistor 110 is connected with the output of described transistor seconds 120, and the second input of described the first transistor 110 is connected with described the first link 130.
The first input end of described transistor seconds 120 is all connected with described the first link 130 by described baric flow change-over circuit 160 and the second input, the first input end of described transistor seconds 120 is also connected with the second link 150 by voltage-stabiliser tube Z1, concrete, the positive pole of described voltage-stabiliser tube Z1 is connected with described the second link 150, negative pole is connected with the first input end of transistor seconds 120, and the plus earth of described voltage-stabiliser tube Z1, as power supply output common port, provide reference voltage reference point.
Under initial condition, described the first link 130 and described the second link 150 no current inputs, now, described power supply output 140 no current outputs.
Under operating state, have direct current from described the first link 130 inputs, the voltage being carried on described the first link 130 punctures described voltage-stabiliser tube Z1, and described voltage-stabiliser tube Z1 two ends maintain certain magnitude of voltage.Described direct current Yi road electric current flows into from the second input of described transistor seconds 120, 120 pairs of described direct current Yi road electric currents of described transistor seconds amplify and output to from its output the first input end of described the first transistor 110, the operating current that the first input end that described baric flow change-over circuit 160 is described transistor seconds 120 by the voltage transitions between described the first link 130 and described voltage-stabiliser tube Z1 negative electrode needs, play metering function simultaneously, the electric current of the first output of avoiding flowing into described transistor seconds 120 is excessive, described transistor seconds 120 is played a protective role.Another road electric current of described direct current flows into from the second input of described the first transistor 110, and another road electric current of 110 pairs of described direct currents of described the first transistor amplifies.Thereby the output that makes described the first transistor 110 is exported large electric current, realize the power supply capacity of described power supply output the last 140.Described voltage-stabiliser tube Z1 makes described power supply output 140 output voltages keep stable.
In the present embodiment, described baric flow change-over circuit 160 is preferably resistance R 1, easily understands, and described baric flow change-over circuit 160 also can be for for being converted to voltage signal the combinational circuit of current signal.
As shown in Figure 2, it is a kind of physical circuit figure of power supply circuits 10 shown in Fig. 1, and wherein said the first transistor 110 is triode Q1, and described transistor seconds 120 is triode Q2.The output of described the first transistor 110, first input end and the second input are respectively emitter, base stage and the collector electrode of described triode Q1.The output of described transistor seconds 120, first input end and the second input are respectively emitter, base stage and the collector electrode of described triode Q2.
As shown in Figure 3, it is the another kind of physical circuit figure of power supply circuits 10 shown in Fig. 1, and wherein said the first transistor 110 is field effect transistor Q3, and described transistor seconds is field effect transistor Q4.The output of described the first transistor 110, first input end and the second input are respectively source electrode, grid and the drain electrode of described field effect transistor Q3.The output of described transistor seconds 120, first input end and the second input are respectively source electrode, grid and the drain electrode of described field effect transistor Q4.
In other embodiment, described the first transistor 110 is that triode Q1, described transistor seconds 120 are field effect transistor Q4, or described the first transistor 110 is that field effect transistor Q3, described transistor seconds 120 are triode Q2.
As shown in Figure 4, it is for using the structural representation of two-wire electronic switch circuit 20 external loads 300 of the power supply circuits 10 shown in Fig. 1, also comprise: control unit 210, described control unit 210 comprises: feeder ear 211, for the zero line input 212 of external zero line 500, the live wire input 213 for external live wire 400, two power output ends 214.Two described power output ends 214 are connected with described the second link 150 with described first link 130 of described power supply circuits 10 respectively, the described power supply output 140 of described power supply circuits 10 is connected with the described feeder ear 211 of described control unit 210, and external load 300 is connected with described live wire input 213 with described live wire 400 respectively.
Whether described control unit 210 is for controlling the break-make of described live wire input 213 and described zero line input 212, and then control described load 300 and work.Described power supply output 140 is for providing work energy to described control unit 210.In the present embodiment, described control unit 210 is also for being converted into the alternating current of described live wire input 213 and 212 inputs of described zero line input direct current and outputing to described the first link 130.
Above-mentioned power supply circuits 10 have the following advantages with traditional power supply circuits tool:
The direct current of inputting from described the first link 130 is via the two-stage amplification of described transistor seconds 120 and described the first transistor 110, make from the larger electric current of described power supply output 140 output, and described voltage-stabiliser tube Z1 makes the voltage of described power supply output 140 outputs keep stable, thereby realized the power supply capacity of described power supply output the last 140.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (7)
1. power supply circuits, is characterized in that, comprising: the first transistor, transistor seconds, power supply output, the first link, voltage-stabiliser tube, the second link, baric flow change-over circuit,
The output of described the first transistor is connected with described power supply output, and the first input end of described the first transistor is connected with the output of described transistor seconds, and the second input of described the first transistor is connected with described the first link;
The first input end of described transistor seconds is connected with described the first link by described baric flow change-over circuit, the second input of described transistor seconds is connected with described the first link, the first input end of described transistor seconds is also connected with described the second link by described voltage-stabiliser tube, the positive pole of described voltage-stabiliser tube is connected with described the second link, negative pole is connected with the first input end of described transistor seconds, and the plus earth of described voltage-stabiliser tube.
2. power supply circuits according to claim 1, is characterized in that, described the first transistor is triode,
The output of described the first transistor, first input end and the second input are respectively emitter, base stage and the collector electrode of described triode.
3. power supply circuits according to claim 1, is characterized in that, described transistor seconds is triode,
The output of described transistor seconds, first input end and the second input are respectively emitter, base stage and the collector electrode of described triode.
4. power supply circuits according to claim 1, is characterized in that, described the first transistor is field effect transistor,
The output of described the first transistor, first input end and the second input are respectively source electrode, grid and the drain electrode of described field effect transistor.
5. power supply circuits according to claim 1, is characterized in that, described transistor seconds is field effect transistor,
The output of described transistor seconds, first input end and the second input are respectively source electrode, grid and the drain electrode of described field effect transistor.
6. power supply circuits according to claim 1, is characterized in that, described baric flow change-over circuit is resistance,
The first input end of described transistor seconds is connected with described the first link by described resistance.
7. a two-wire electronic switch circuit, is characterized in that, comprises the power supply circuits described in claim 1-6 any one, also comprises control unit,
Described control unit comprises: feeder ear, the zero line input for external zero line, the live wire input for external live wire, two power output ends;
Two described power output ends are connected with described the second link with described first link of described power supply circuits respectively, and the described power supply output of described power supply circuits is connected with the described feeder ear of described control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093171.9U CN203775031U (en) | 2014-03-03 | 2014-03-03 | Power supply circuit and two-wire system electronic switching circuit using the power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093171.9U CN203775031U (en) | 2014-03-03 | 2014-03-03 | Power supply circuit and two-wire system electronic switching circuit using the power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203775031U true CN203775031U (en) | 2014-08-13 |
Family
ID=51292179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420093171.9U Expired - Lifetime CN203775031U (en) | 2014-03-03 | 2014-03-03 | Power supply circuit and two-wire system electronic switching circuit using the power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203775031U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963891A (en) * | 2016-06-16 | 2016-09-28 | 蚌埠依爱消防电子有限责任公司 | Start-stop switching circuit controlled by two wires, terminal load, detection circuit and detection method |
-
2014
- 2014-03-03 CN CN201420093171.9U patent/CN203775031U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963891A (en) * | 2016-06-16 | 2016-09-28 | 蚌埠依爱消防电子有限责任公司 | Start-stop switching circuit controlled by two wires, terminal load, detection circuit and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108181965A (en) | A kind of adjustable current foldback circuit of restriction value | |
| CN205509647U (en) | Switch control device | |
| CN101949966B (en) | Mobile terminal capable of accurately detecting charging current | |
| CN204652315U (en) | A kind of high-power amplifier drive circuit | |
| CN203775031U (en) | Power supply circuit and two-wire system electronic switching circuit using the power supply circuit | |
| CN202757983U (en) | Current detection circuit and USB interface circuit | |
| CN205178996U (en) | Audio signal amplifier circuit | |
| US8564265B2 (en) | Driving circuit | |
| CN105375892B (en) | A kind of energy-efficient current amplifier | |
| CN204241556U (en) | A kind of 220VAC load current detection circuit | |
| CN204497758U (en) | A kind of lithium cell charging current limliting module | |
| CN104506151B (en) | A kind of operational amplifier for medical electronics | |
| CN107896096A (en) | Sampling hold circuit front-end wideband amplifier | |
| CN203457134U (en) | Metal-oxide field-effect transistor and bipolar transistor-contained mixed common-source common-base circuit | |
| CN203590164U (en) | Heterojunction bipolar transistor low-power channel power amplifier | |
| CN206573967U (en) | A kind of positive and negative adjustable D.C. regulated power supply | |
| CN207339633U (en) | A kind of drive circuit of improved power switch pipe | |
| CN207530535U (en) | A kind of voltage control circuit for automatic transfer switch controller | |
| CN206595978U (en) | The PLC transistor output mouthful isolation circuits built with phase inverter and triode | |
| CN204216794U (en) | Power circuit | |
| CN205005032U (en) | Electric circuit | |
| CN104124933A (en) | Amplification circuit, circuit board and electronic device | |
| CN104333238A (en) | Power supply circuit for navigation device | |
| CN202363953U (en) | Constant current control circuit | |
| CN205178881U (en) | Energy -saving load circuit in advance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150918 Address after: 516000 Guangdong province Huizhou City Zhongkai national hi tech Development Zone, five East Road Cheong Hui Industrial Zone No. 10 Patentee after: HUIZHOU QIRUI ELECTRIC Co.,Ltd. Address before: The adjacent Garden Road in Qingshan District of Baotou 014000 the Inner Mongolia Autonomous Region 1 Building No. 27 Patentee before: Wang Xiaoyuan |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |
|
| CX01 | Expiry of patent term |