CN204349963U - Control signal output circuit - Google Patents
Control signal output circuit Download PDFInfo
- Publication number
- CN204349963U CN204349963U CN201420830331.3U CN201420830331U CN204349963U CN 204349963 U CN204349963 U CN 204349963U CN 201420830331 U CN201420830331 U CN 201420830331U CN 204349963 U CN204349963 U CN 204349963U
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- China
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- pin
- circuit
- amplifier
- tlv2372
- diode
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- Withdrawn - After Issue
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Abstract
Control signal output circuit of the present utility model, comprises trigger SN74V1G14, follow circuit, amplifying circuit and V/I circuit, and the input of trigger is by resistance R1 connection signal input, and the power end of trigger connects 2.5V reference voltage; Follow circuit comprises amplifier TLV2372, the input of amplifier TLV2372 is connected with flip-flop output by two RC circuit, the output of amplifier TLV2372 connects V/I circuit input end and input amplifier respectively by a RC circuit, V/I circuit input end exports 4-20mA current signal, and amplification circuit output end exports 0-10V voltage signal.The multistage RC filtering of circuit design, and at current signal output end design fuse, design clamped protection diode at voltage signal output end, enhance the stability of output voltage and current signal, the sound assurance safety of inside circuit electronic devices and components.
Description
Technical field
The utility model relates to central air-conditioning freezing Systematical control field, specifically a kind of control signal output circuit.
Background technology
In central air conditioning system, refrigeration system is essential is also vital part, in order to ensure good refrigerating effect, need to send stable, current signal and voltage signal accurately to on-the-spot freezing performer, for the signal output module in existing refrigeration system, the number of chips adopted due to signal output apparatus is more, cause the interference of output large, stability is bad, and cost is also higher, finally makes the freezing accuracy controlled that exports be affected.
Utility model content
The utility model provides a kind of control signal output circuit, can effectively reduce cost, improves the stability of output signal.
The utility model is by the following technical solutions: control signal output circuit, comprise trigger SN74V1G14, follow circuit, amplifying circuit and V/I circuit, the input of described trigger SN74V1G14 is by resistance R1 connection signal input, the power end of trigger SN74V1G14 connects 2.5V reference voltage V ref, the earth terminal ground connection of trigger SN74V1G14; Described follow circuit comprises amplifier TLV2372, the input of amplifier TLV2372 is connected with the output of trigger SN74V1G14 by two RC filter circuits, the output of amplifier TLV2372 connects V/I circuit input end and input amplifier respectively by a RC circuit, V/I circuit input end exports 4-20mA current signal, and amplification circuit output end exports 0-10V voltage signal.
Further, described amplifying circuit comprises resistance R5, resistance R5 one end ground connection, another termination of resistance R5 amplifier TLV2372 the 6th pin, amplifier TLV2372 the 5th pin connects amplifier TLV2372 first pin, amplifier TLV2372 the 6th pin connects amplifier TLV2372 the 7th pin by resistance R6, electric capacity C7 is in parallel with resistance R6, amplifier TLV2372 the 7th pin is by electric capacity C8 ground connection, amplifier TLV2372 the 7th pin connects diode D6 negative pole respectively, diode D7 positive pole, diode D8 positive pole, diode D6 plus earth, diode D7 negative pole connects 12V voltage, diode D8 negative pole connects 0-10V voltage signal output end by resistance R7.
Further, described V/I circuit comprises conversion chip XTR115, the VREF pin of conversion chip XTR115 meets reference voltage V ref, the VIN pin of conversion chip XTR115 meets reference voltage V ref by resistance R5, the VIN pin of conversion chip XTR115 connects amplifier TLV2372 first pin by resistance R4, the IP pin of conversion chip XTR115 meets reference voltage V ref by electric capacity C5, the IP pin ground connection of conversion chip XTR115, the V+ pin of conversion chip XTR115 connects triode Q1 collector electrode respectively, electric capacity C6 one end, an input of diode D1 negative pole and full-wave rectification bridge, the base stage of triode Q1 connects the B pin of conversion chip XTR115, the emitter of triode Q1 connects the C pin of conversion chip XTR115, the electric capacity C6 other end, diode D1 positive pole is all connected the V-pin of conversion chip XTR115 with another input of full-wave rectification bridge, full-wave rectification bridge is by diode D2, diode D3, diode D4 and diode D5 forms, the output of full-wave rectification bridge exports 4-20mA current signal.
The beneficial effects of the utility model are: the multistage RC filtering of circuit design; and at current signal output end design fuse; clamped protection diode is designed at voltage signal output end; enhance the stability of output voltage and current signal, the sound assurance safety of inside circuit electronic devices and components.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Control signal output circuit as shown in Figure 1, comprise trigger SN74V1G14, follow circuit, amplifying circuit and V/I circuit, the input of described trigger SN74V1G14 is by resistance R1 connection signal input, the power end of trigger SN74V1G14 connects reference voltage V ref, reference voltage V ref passes through electric capacity C1 ground connection, the earth terminal ground connection of trigger SN74V1G14, described follow circuit comprises resistance R2, the output of resistance R2 end thereof contacts hair device SN74V1G14, the resistance R2 other end connects electric capacity C2 one end and resistance R3 one end respectively, electric capacity C2 other end ground connection, the resistance R3 other end connects electric capacity C3 one end and amplifier TLV2372 the 3rd pin respectively, electric capacity C3 other end ground connection, and amplifier TLV2372 second pin connects amplifier TLV2372 first pin, amplifier TLV2372 the 8th pin connects 12V voltage, amplifier TLV2372 the 4th pin ground connection, described amplifying circuit comprises resistance R5, resistance R5 one end ground connection, another termination of resistance R5 amplifier TLV2372 the 6th pin, amplifier TLV2372 the 5th pin connects amplifier TLV2372 first pin, amplifier TLV2372 the 6th pin connects amplifier TLV2372 the 7th pin by resistance R6, electric capacity C7 is in parallel with resistance R6, amplifier TLV2372 the 7th pin is by electric capacity C8 ground connection, amplifier TLV2372 the 7th pin connects diode D6 negative pole respectively, diode D7 positive pole, diode D8 positive pole, diode D6 plus earth, diode D7 negative pole connects 12V voltage, diode D8 negative pole connects 0-10V voltage signal output end by resistance R7, described V/I circuit comprises conversion chip XTR115, the VREF pin of conversion chip XTR115 meets reference voltage V ref, the VIN pin of conversion chip XTR115 meets reference voltage V ref by resistance R5, the VIN pin of conversion chip XTR115 connects amplifier TLV2372 first pin by resistance R4, the IP pin of conversion chip XTR115 meets reference voltage V ref by electric capacity C5, the IP pin ground connection of conversion chip XTR115, the V+ pin of conversion chip XTR115 connects triode Q1 collector electrode respectively, electric capacity C6 one end, an input of diode D1 negative pole and full-wave rectification bridge, the base stage of triode Q1 connects the B pin of conversion chip XTR115, the emitter of triode Q1 connects the C pin of conversion chip XTR115, the electric capacity C6 other end, diode D1 positive pole is all connected the V-pin of conversion chip XTR115 with another input of full-wave rectification bridge, full-wave rectification bridge is by diode D2, diode D3, diode D4 and diode D5 forms, the output of full-wave rectification bridge exports 4-20mA current signal.
Wherein, resistance R1 is the current limiting safeguard resistor of 4.7K ohm; two-stage RC filtering is had between trigger and amplifier; resistance R5 connects 2.5V reference voltage; the voltage minimum being used for ensureing XTR5 input is 0.4V, and catching diode D6, D7 ensure higher than 12V, 100mA fuse, the voltage of output does not ensure that the current value of current signal output end is no more than 100mA; D1 protect IC XTR115 magnitude of voltage is no more than 36V, and full-wave rectification bridge realizes full-wave rectification.
Except structure described in the utility model, all the other are prior art.
The above is preferred implementation of the present utility model; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection range of the present utility model.
Claims (3)
1. control signal output circuit, it is characterized in that, comprise trigger SN74V1G14, follow circuit, amplifying circuit and V/I circuit, the input of described trigger SN74V1G14 is by resistance R1 connection signal input, the power end of trigger SN74V1G14 connects 2.5V reference voltage V ref, the earth terminal ground connection of trigger SN74V1G14; Described follow circuit comprises amplifier TLV2372, the input of amplifier TLV2372 is connected with the output of trigger SN74V1G14 by two RC circuit, the output of amplifier TLV2372 connects V/I circuit input end and input amplifier respectively by a RC circuit, V/I circuit input end exports 4-20mA current signal, and amplification circuit output end exports 0-10V voltage signal.
2. control signal output circuit according to claim 1, it is characterized in that, described amplifying circuit comprises resistance R5, resistance R5 one end ground connection, another termination of resistance R5 amplifier TLV2372 the 6th pin, amplifier TLV2372 the 5th pin connects amplifier TLV2372 first pin, amplifier TLV2372 the 6th pin connects amplifier TLV2372 the 7th pin by resistance R6, electric capacity C7 is in parallel with resistance R6, amplifier TLV2372 the 7th pin is by electric capacity C8 ground connection, amplifier TLV2372 the 7th pin connects diode D6 negative pole respectively, diode D7 positive pole, diode D8 positive pole, diode D6 plus earth, diode D7 negative pole connects 12V voltage, diode D8 negative pole connects 0-10V voltage signal output end by resistance R7.
3. control signal output circuit according to claim 1 and 2, it is characterized in that, described V/I circuit comprises conversion chip XTR115, the VREF pin of conversion chip XTR115 meets reference voltage V ref, the VIN pin of conversion chip XTR115 meets reference voltage V ref by resistance R5, the VIN pin of conversion chip XTR115 connects amplifier TLV2372 first pin by resistance R4, the IP pin of conversion chip XTR115 meets reference voltage V ref by electric capacity C5, the IP pin ground connection of conversion chip XTR115, the V+ pin of conversion chip XTR115 connects triode Q1 collector electrode respectively, electric capacity C6 one end, an input of diode D1 negative pole and full-wave rectification bridge, the base stage of triode Q1 connects the B pin of conversion chip XTR115, the emitter of triode Q1 connects the C pin of conversion chip XTR115, the electric capacity C6 other end, diode D1 positive pole is all connected the V-pin of conversion chip XTR115 with another input of full-wave rectification bridge, full-wave rectification bridge is by diode D2, diode D3, diode D4 and diode D5 forms, the output of full-wave rectification bridge exports 4-20mA current signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420830331.3U CN204349963U (en) | 2014-12-25 | 2014-12-25 | Control signal output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420830331.3U CN204349963U (en) | 2014-12-25 | 2014-12-25 | Control signal output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204349963U true CN204349963U (en) | 2015-05-20 |
Family
ID=53233200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420830331.3U Withdrawn - After Issue CN204349963U (en) | 2014-12-25 | 2014-12-25 | Control signal output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204349963U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467798A (en) * | 2014-12-25 | 2015-03-25 | 李钢 | Control signal output circuit |
-
2014
- 2014-12-25 CN CN201420830331.3U patent/CN204349963U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467798A (en) * | 2014-12-25 | 2015-03-25 | 李钢 | Control signal output circuit |
| CN104467798B (en) * | 2014-12-25 | 2018-01-19 | 李钢 | Control signal output circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170329 Address after: 250021 Ji'nan, Central District, Shandong City Road, the southern part of the shop No. 18 Patentee after: Shandong Jinzhou Kerui Energy Technology Co. Ltd. Address before: 250024 Ji'nan City, Central District, Shandong sunshine new road, No. 69 Patentee before: Li Gang |
|
| TR01 | Transfer of patent right | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150520 Effective date of abandoning: 20180119 |
|
| AV01 | Patent right actively abandoned |