CN102723946B - Signal isolation control circuit - Google Patents
Signal isolation control circuit Download PDFInfo
- Publication number
- CN102723946B CN102723946B CN201110079238.4A CN201110079238A CN102723946B CN 102723946 B CN102723946 B CN 102723946B CN 201110079238 A CN201110079238 A CN 201110079238A CN 102723946 B CN102723946 B CN 102723946B
- Authority
- CN
- China
- Prior art keywords
- triode
- resistance
- power supply
- access point
- supply access
- 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.)
- Active
Links
Landscapes
- Bipolar Transistors (AREA)
- Networks Using Active Elements (AREA)
Abstract
The present invention relates to a signal isolation control circuit. An end of a first resistor is connected with a signal input point. The other end of the first resistor is connected with a base electrode of a first triode. An emitter of the first triode is connected with an anode of a power supply access point. A collector electrode of the first triode is orderly connected with a second resistor and a third resistor in series and then is connected with a cathode of the power supply access point. A base electrode of a second triode is connected between the second resistor and the third resistor. An emitter of the second triode is connected with the cathode of the power supply access point. A collector electrode of the second triode is connected with an input point of a terminal. Another input point of the terminal is connected with the anode of the power supply access point. Compared with the prior art, the signal isolation control circuit has a simple structure, and a condition that a whole system can not work due to a fault of a terminal is solved.
Description
Technical field
The present invention relates to a kind of signal control circuit, especially relate to a kind of signal isolation control circuit.
Background technology
In control system, often can run into the situation that a control signal will be controlled a lot of terminals.Traditional control circuit is due to irrational design, and normal appearance makes the inoperable situation of whole system because of the fault of certain terminal, therefore realizes the technology of the isolated controlling of a signal to multiple terminals and arises at the historic moment.
Summary of the invention
Object of the present invention is exactly to provide a kind of simple in structure in order to overcome the defect that above-mentioned prior art exists, and has solved the signal isolation control circuit that makes the inoperable situation of whole system because of the fault of certain terminal.
Object of the present invention can be achieved through the following technical solutions: signal isolation control circuit, it is characterized in that, this circuit comprises signal input point, signal output point, power supply access point, the first resistance, the second resistance, the 3rd resistance, the first triode, the second triode, at least one terminal, one end of the first described resistance is connected with signal input point, the other end of the first resistance is connected with the base stage of the first triode, the emitter of the first described triode is connected with the positive pole of power supply access point, the collector electrode of the first triode and the second resistance, the 3rd resistance is connected with the negative pole of power supply access point after connecting successively, the base stage of the second described triode and the second resistance, between the 3rd resistance, connect, the emitter of the second triode is connected with the negative pole of power supply access point, the collector electrode of the second triode is connected with the input point of terminal, another input point of described terminal is connected with the positive pole of power supply access point.
The first described triode is positive-negative-positive triode.
The second described triode is NPN type triode.
Described terminal comprises optocoupler, this optocoupler comprises input, output, an input of described optocoupler is connected with the positive pole of power supply access point by access resistance, another input of optocoupler is connected with the collector electrode of the second triode, an output of described optocoupler is connected with signal output point, another output of optocoupler is connected with the negative pole of power supply access point, and described signal output point is connected with the positive pole of power supply access point by picking out resistance.
Compared with prior art, circuit structure of the present invention simply, only just can realize a control signal with several elements multiple terminals are controlled, and solved and made the inoperable situation of whole system because of the fault of certain terminal.
Brief description of the drawings
Fig. 1 is circuit connection diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, signal isolation control circuit, this circuit comprises signal input point, signal output point, power supply access point, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the first triode Q1, the second triode Q2, terminal U1.Terminal U1 comprises optocoupler, and this optocoupler comprises input, output.One end of the first resistance R 1 is connected with signal input point, and the other end of the first resistance R 1 is connected with the base stage of the first triode Q1.The emitter of the first triode Q1 is connected with the positive pole of power supply access point, and the collector electrode of the first triode Q1 is connected successively and is connected with the negative pole of power supply access point afterwards with the second resistance R 2, the 3rd resistance R 3.Between the base stage of the second triode Q2 and the second resistance R 2, the 3rd resistance R 3, be connected, the emitter of the second triode Q2 is connected with the negative pole of power supply access point, and the collector electrode of the second triode Q2 is connected with an input of optocoupler.Another input of optocoupler is connected with the positive pole of power supply access point by access resistance R 4.An output of optocoupler is connected with signal output point, and another output of optocoupler is connected with the negative pole of power supply access point.Signal output point is connected with the positive pole of power supply access point by picking out resistance R 5.The first triode is positive-negative-positive triode.The second triode is NPN type triode.When terminal has when multiple, its connected mode is with terminal U1.
Claims (3)
1. signal isolation control circuit, it is characterized in that, this circuit comprises signal input point, signal output point, power supply access point, the first resistance, the second resistance, the 3rd resistance, the first triode, the second triode, at least one terminal, one end of the first described resistance is connected with signal input point, the other end of the first resistance is connected with the base stage of the first triode, the emitter of the first described triode is connected with the positive pole of power supply access point, the collector electrode of the first triode and the second resistance, the 3rd resistance is connected with the negative pole of power supply access point after connecting successively, the base stage of the second described triode is connected to the second resistance, between the 3rd resistance, the emitter of the second triode is connected with the negative pole of power supply access point, the collector electrode of the second triode is connected with the input point of terminal, another input point of described terminal is connected with the positive pole of power supply access point,
Described terminal comprises optocoupler, this optocoupler comprises input, output, an input of described optocoupler is connected with the positive pole of power supply access point by access resistance, another input of optocoupler is connected with the collector electrode of the second triode, an output of described optocoupler is connected with signal output point, another output of optocoupler is connected with the negative pole of power supply access point, and described signal output point is connected with the positive pole of power supply access point by picking out resistance.
2. signal isolation control circuit according to claim 1, is characterized in that, the first described triode is positive-negative-positive triode.
3. signal isolation control circuit according to claim 1, is characterized in that, the second described triode is NPN type triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079238.4A CN102723946B (en) | 2011-03-30 | 2011-03-30 | Signal isolation control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079238.4A CN102723946B (en) | 2011-03-30 | 2011-03-30 | Signal isolation control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102723946A CN102723946A (en) | 2012-10-10 |
| CN102723946B true CN102723946B (en) | 2014-10-15 |
Family
ID=46949631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110079238.4A Active CN102723946B (en) | 2011-03-30 | 2011-03-30 | Signal isolation control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102723946B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455512A (en) * | 2003-06-06 | 2003-11-12 | 厦门宏发电声有限公司 | Low-voltage triggered constant-current source input solid relay |
| CN101976993A (en) * | 2010-11-11 | 2011-02-16 | 苏州合欣美电子科技有限公司 | Motor positive/negative rotation circuit for eco-house |
| CN201758271U (en) * | 2010-06-25 | 2011-03-09 | 新宝电机(东莞)有限公司 | Standby protection circuit without optical coupler |
| CN201985840U (en) * | 2011-03-30 | 2011-09-21 | 上海军远通信设备有限公司 | Circuit capable of realizing isolation control for multiple terminals by single signal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005048889A1 (en) * | 2005-10-12 | 2007-04-19 | BSH Bosch und Siemens Hausgeräte GmbH | Interface arrangement with electrical isolation for connection to an electrical device, in particular home appliance |
-
2011
- 2011-03-30 CN CN201110079238.4A patent/CN102723946B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1455512A (en) * | 2003-06-06 | 2003-11-12 | 厦门宏发电声有限公司 | Low-voltage triggered constant-current source input solid relay |
| CN201758271U (en) * | 2010-06-25 | 2011-03-09 | 新宝电机(东莞)有限公司 | Standby protection circuit without optical coupler |
| CN101976993A (en) * | 2010-11-11 | 2011-02-16 | 苏州合欣美电子科技有限公司 | Motor positive/negative rotation circuit for eco-house |
| CN201985840U (en) * | 2011-03-30 | 2011-09-21 | 上海军远通信设备有限公司 | Circuit capable of realizing isolation control for multiple terminals by single signal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102723946A (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103326458B (en) | A kind of external power source and battery powered power supply switch circuit | |
| CN103683263A (en) | Circuit for preventing reverse plug in of direct current power supply and lamp | |
| CN203870427U (en) | Low-electricity consumption control circuit in standby state | |
| CN100527306C (en) | Control circuit of relay | |
| CN104916492A (en) | Relay control circuit | |
| CN102723946B (en) | Signal isolation control circuit | |
| CN201985840U (en) | Circuit capable of realizing isolation control for multiple terminals by single signal | |
| CN103683264A (en) | Circuit for preventing reverse plug in of direct current power supply and lamp | |
| CN204425314U (en) | A kind of opto-coupled feedback isolator | |
| CN205355776U (en) | Short -circuit protection circuit based on power load is unusual | |
| CN202886881U (en) | Full-hardware startup and shutdown circuit | |
| CN102595731A (en) | Light-dimming LED controller and output short-circuit protection method thereof | |
| CN201789414U (en) | Current boosting circuit of three terminal regulator | |
| CN105047477A (en) | Relay energy-saving control circuit | |
| CN202019300U (en) | Voltage boosting device | |
| CN203691374U (en) | Two-wire sensor interface circuit | |
| CN204425315U (en) | A kind of photoisolator | |
| CN101968753A (en) | Powder down memory circuit | |
| CN204615384U (en) | The anti-wrong output circuit of a kind of series battery | |
| CN202918247U (en) | Digital short-circuit protection device of audio power amplifier | |
| CN203466743U (en) | Constant-current direct-drive LED switch power supply | |
| CN202918402U (en) | Circuit reset system of television set | |
| CN202488823U (en) | Dimming LED (light-emitting diode) controller | |
| CN201699466U (en) | Charger circuit | |
| CN206481035U (en) | A kind of current foldback circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |