CN204331527U - The communicating circuit of adaptation power supply power supply and air conditioner - Google Patents
The communicating circuit of adaptation power supply power supply and air conditioner Download PDFInfo
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- CN204331527U CN204331527U CN201420800250.9U CN201420800250U CN204331527U CN 204331527 U CN204331527 U CN 204331527U CN 201420800250 U CN201420800250 U CN 201420800250U CN 204331527 U CN204331527 U CN 204331527U
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- power supply
- communicating circuit
- voltage follower
- signal output
- signal input
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Abstract
The utility model discloses a kind of communicating circuit and air conditioner of adaptation power supply power supply.This communicating circuit comprises signal input unit and signal output unit, signal input unit comprises the first signal input part, power supply, voltage follower and the first signal output part, first signal input part is connected to the input end of voltage follower, first signal output part is connected to the output terminal of voltage follower, and power supply is used for powering to voltage follower.According to communicating circuit of the present utility model, the scope of communicating circuit supply voltage can be increased, improve the security that communicating circuit uses.
Description
Technical field
The utility model circuit voltage regulation technology field, in particular to a kind of communicating circuit and air conditioner of adaptation power supply power supply.
Background technology
The connection of a lot of serial ports is except connection (RXD, TXD) own and ground wire at present, also will provide power lead powering load or strengthen communicating circuit load capacity.But basic communicating circuit power supply all have been directed to specific magnitude of voltage such as+3.3V and designs, when using other magnitude of voltage power supply, because connection TXD directly connects chip pin, other voltages being different from chip operating voltage can be made to seal in chip and burn out chip, time serious, there will be the consequence of burning mainboard.
Utility model content
A kind of communicating circuit and air conditioner of adaptation power supply power supply are provided in the utility model embodiment, the scope of communicating circuit supply voltage can be increased, improve the security that communicating circuit uses.
For solving the problems of the technologies described above, the utility model embodiment provides a kind of communicating circuit of adaptation power supply power supply, comprise signal input unit and signal output unit, signal input unit comprises the first signal input part, power supply, voltage follower and the first signal output part, first signal input part is connected to the input end of voltage follower, first signal output part is connected to the output terminal of voltage follower, and power supply is used for powering to voltage follower.
As preferably, between the output terminal of voltage follower and the first signal output part, be also provided with current-limiting resistance.
As preferably, voltage follower comprises operational amplifier, the input end of the just very voltage follower of operational amplifier, and the negative pole of operational amplifier is connected to the output terminal of operational amplifier, and the output terminal of operational amplifier is the output terminal of voltage follower.
As preferably, connected by photo-coupler between signal input unit and signal output unit, signal output unit comprises the secondary signal input end and the secondary signal output terminal that form optically-coupled with the first signal output part of signal input unit, is provided with phase inverter between secondary signal input end and secondary signal output terminal.
As preferably, phase inverter is triode, and photo-coupler is triode type photoelectrical coupler, and the collector pin of photo-coupler is connected to base stage and the collector of triode, the emitter of photo-coupler and the equal ground connection of the emitter of triode.
As preferably, the base stage of triode passes through capacity earth.
According to another embodiment of the present utility model, provide a kind of air conditioner, comprise the communicating circuit of above-mentioned adaptation power supply power supply.
Application the technical solution of the utility model, the communicating circuit of adaptation power supply power supply comprises signal input unit and signal output unit, signal input unit comprises the first signal input part, power supply, voltage follower and the first signal output part, first signal input part is connected to the input end of voltage follower, described first signal output part is connected to the output terminal of voltage follower, and power supply is used for powering to voltage follower.When applying communicating circuit and the air conditioner of this adaptation power supply power supply, voltage follower makes output signal follow input signal completely, and power supply is only for powering to voltage follower, only need in the operating voltage range of voltage follower, the applied signal voltage of communication input is only consistent with output voltage, with the voltage of power supply without direct relation, therefore the supply voltage of communicating circuit is made no longer to be confined to a certain specific voltage, there is the larger scope of application, can effectively prevent other voltages being different from chip operating voltage from sealing in chip and burning mainboard, effectively can improve the security that communicating circuit uses.
Accompanying drawing explanation
Fig. 1 is the steering logic figure of the communicating circuit of the utility model embodiment;
Fig. 2 is the fundamental diagram of the communicating circuit of the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
Shown in Fig. 1 and Fig. 2, according to embodiment of the present utility model, the communicating circuit of adaptation power supply power supply comprises signal input unit and signal output unit, signal input unit comprises the first signal input part, power supply, voltage follower U2 and the first signal output part, first signal input part is connected to the input end (i.e. the pin 3 of voltage follower U2) of voltage follower U2, first signal output part is connected to the output terminal (i.e. the pin 1 of voltage follower U2) of voltage follower U2, power supply VCC is connected to the pin 4 of voltage follower U2, for powering to voltage follower U2.Pin 5 ground connection (GND) of voltage follower U2.First signal input part is specifically set to connection TXD.Specifically, this voltage follower U2 comprises operational amplifier, the input end that the positive pole (i.e. the pin 3 of voltage follower U2) of operational amplifier is voltage follower, the negative pole (i.e. the pin 2 of voltage follower U2) of operational amplifier is connected to the output terminal of operational amplifier, and the output terminal of operational amplifier is the output terminal of voltage follower.
When applying the communicating circuit of this adaptation power supply power supply, voltage follower U2 makes output signal follow input signal completely, and power supply VCC is only for powering to voltage follower U2, the voltage of the input signal of communication input is only consistent with the voltage of output signal, with the supply voltage of power supply VCC without direct relation, namely when the input end of voltage follower U2 has signal to come, the output signal of voltage follower U2 will keep consistent with input signal, therefore only need the supply voltage of power supply VCC in the operating voltage range of voltage follower U2, the voltage of the power supply VCC of communicating circuit is made no longer to be confined to a certain specific voltage, there is the larger scope of application, can effectively prevent other voltages being different from chip operating voltage from sealing in chip and burning mainboard, effectively can improve the security that communicating circuit uses.In addition, because the input end of voltage follower U2 presents high-impedance state, electric current is very little, therefore, it is possible to effectively extend communication distance.
For communication voltage for 3.3V, in the communicating circuit course of work, the supply voltage of the power supply VCC of voltage follower U2 can meet the greatest limit voltage of 3.3V to voltage follower U2, output signal follows input signal completely, so when meeting communicating circuit work, communication voltage is not confined to the supply voltage of 3.3V, can be adapted to the supply voltage that other meet voltage follower U2 use yet.
In the present embodiment, connected by photo-coupler U1 between signal input unit and signal output unit, signal output unit comprises the secondary signal input end and the secondary signal output terminal that form optically-coupled with the first signal output part of signal input unit, is provided with phase inverter Q3 between secondary signal input end and secondary signal output terminal.Secondary signal output terminal is specifically set to connection RXD.The left side of photo-coupler U1 is signal sending end, and right side is signal receiving end, realizes electrical isolation by photo-coupler U1, thus has good electrical isolation capabilities and antijamming capability.
The level of the collector pin 4 of photo-coupler U1 is contrary with pin 1 level of photo-coupler U1, when the transmitting terminal of photo-coupler U1 sends high level, the level of pin 4 will be low level, be consistent to realize two end communication level, the secondary signal output terminal of signal output unit has added a phase inverter Q3 and has realized level oppositely, thus ensures that connection RXD signal is consistent with the level of connection TXD signal.
Specifically, phase inverter Q3 is triode, photo-coupler U1 is triode type photoelectrical coupler, the collector pin 4 of photo-coupler U1 is connected to base stage B and the collector C of triode, the emitter pin 3 of photo-coupler U1 and the equal ground connection of emitter E of triode, the base stage B of triode is by electric capacity C1 ground connection.The object of electric capacity C1 is logical interchange stopping direct current, stablizes the serviceability of triode.Between the collector pin 4 and the collector C of triode of photo-coupler U1, be also disposed with resistance R1 and R3, between R3 and R1, be connected with external power supply.R3 uses as pull-up resistor, can ensure the collector output voltage of triode.
When communicating circuit works, transmitting terminal Communication Control chip is by the signal input unit transmission signal of connection TXD to communicating circuit, then the signal input unit of communicating circuit by signal transmission to signal output unit, the signal voltage of signal output unit to signal input unit processes, then by connection RXD, communication signal is passed to receiving end Communication Control chip, the communication work of settling signal.
In the process, the voltage that transmitting terminal Communication Control chip inputs to the input end of photo-coupler U1 is consistent with connection RXD voltage, and the supply voltage of voltage follower U2 is consistent with the supply voltage of power supply VCC, if such as voltage follower U2 supports that power supply voltage range is 0V to 36V, then this circuit can the communicating circuit (requiring the supply voltage >=connection high level voltage of power supply VCC) of self application 0V to 36V supply voltage.Namely to be input to the voltage of photo-coupler U1 consistent with the output voltage of transmitting terminal Communication Control chip for communicating circuit, with the supply voltage of power supply VCC without direct relation.
Preferably, be also provided with current-limiting resistance R2 between the output terminal of voltage follower U2 and the first signal output part, the effect of this current-limiting resistance R2 is, ensures the electric current needed for photo-coupler U1 normally.
According to embodiment of the present utility model, provide a kind of air conditioner, this air conditioner comprises above-mentioned communicating circuit.
Certainly, be more than preferred implementation of the present utility model.It should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model ultimate principle, can also make some improvements and modifications, these improvements and modifications are also considered as protection domain of the present utility model.
Claims (7)
1. the communicating circuit of an adaptation power supply power supply, it is characterized in that, comprise signal input unit and signal output unit, described signal input unit comprises the first signal input part, power supply, voltage follower and the first signal output part, described first signal input part is connected to the input end of described voltage follower, described first signal output part is connected to the output terminal of described voltage follower, and described power supply is used for powering to described voltage follower.
2. communicating circuit according to claim 1, is characterized in that, is also provided with current-limiting resistance between the output terminal of described voltage follower and described first signal output part.
3. communicating circuit according to claim 2, it is characterized in that, described voltage follower comprises operational amplifier, the input end of the just very described voltage follower of described operational amplifier, the negative pole of described operational amplifier is connected to the output terminal of described operational amplifier, and the output terminal of described operational amplifier is the output terminal of described voltage follower.
4. communicating circuit according to claim 3, it is characterized in that, connected by photo-coupler between described signal input unit and described signal output unit, described signal output unit comprises the secondary signal input end and the secondary signal output terminal that form optically-coupled with the first signal output part of described signal input unit, is provided with phase inverter between described secondary signal input end and described secondary signal output terminal.
5. communicating circuit according to claim 4, it is characterized in that, described phase inverter is triode, described photo-coupler is triode type photoelectrical coupler, the collector pin of described photo-coupler is connected to base stage and the collector of described triode, the emitter of described photo-coupler and the equal ground connection of emitter of described triode.
6. communicating circuit according to claim 5, is characterized in that, the base stage of described triode passes through capacity earth.
7. an air conditioner, is characterized in that, comprises the communicating circuit of the adaptation power supply power supply according to any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420800250.9U CN204331527U (en) | 2014-12-16 | 2014-12-16 | The communicating circuit of adaptation power supply power supply and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420800250.9U CN204331527U (en) | 2014-12-16 | 2014-12-16 | The communicating circuit of adaptation power supply power supply and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN204331527U true CN204331527U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420800250.9U Expired - Fee Related CN204331527U (en) | 2014-12-16 | 2014-12-16 | The communicating circuit of adaptation power supply power supply and air conditioner |
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| CN (1) | CN204331527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516388A (en) * | 2014-12-16 | 2015-04-15 | 珠海格力电器股份有限公司 | Communication circuit self-adaptive to power supply and air-conditioner |
-
2014
- 2014-12-16 CN CN201420800250.9U patent/CN204331527U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104516388A (en) * | 2014-12-16 | 2015-04-15 | 珠海格力电器股份有限公司 | Communication circuit self-adaptive to power supply and air-conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20211216 |