CN207010674U - A kind of single-wire communication circuit - Google Patents
A kind of single-wire communication circuit Download PDFInfo
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- CN207010674U CN207010674U CN201721048584.5U CN201721048584U CN207010674U CN 207010674 U CN207010674 U CN 207010674U CN 201721048584 U CN201721048584 U CN 201721048584U CN 207010674 U CN207010674 U CN 207010674U
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Abstract
The utility model provides a kind of single-wire communication circuit, including data transtation mission circuit；Data transtation mission circuit includes level switch module and recommending output mode module；Level switch module is used to receive the input signal of first input end and the control signal of control terminal, carries out level conversion to input signal according to control signal, and the signal after level conversion is transmitted to recommending output mode module；Recommending output mode module is for the signal after receiving level conversion and transmits to output end, and recommending output mode module includes recommending the third transistor being connected and the 4th transistor.Single-wire communication circuit driving force provided by the utility model is strong, transmission range is long, baud rate is high and strong antijamming capability.
Description
Technical field
It the utility model is related to communication technique field, and in particular to a kind of single-wire communication circuit.
Background technology
Make the mode of connection between equipment complicated due to two-wire system and three-wire system communication modes, and cost is higher, single line leads to
News mode increasingly becomes main flow.Existing single-wire communication circuit is exported using single triode resistance pull-up mode, driving energy
Power is weak, transmission range is short, baud rate is low and antijamming capability is weak.
Utility model content
In view of this, the utility model proposes a kind of single-wire communication circuit, to solve existing single-wire communication circuit
The problem of driving force is weak, transmission range is short, baud rate is low and antijamming capability is weak.
To achieve the above object, the utility model adopts the following technical scheme that：
The utility model provides a kind of single-wire communication circuit, including data transtation mission circuit；The data transtation mission circuit includes
Level switch module and recommending output mode module；The level switch module is used for input signal and the control for receiving first input end
The control signal at end, level conversion is carried out to the input signal according to the control signal, and by the signal after level conversion
Transmit to recommending output mode module；The recommending output mode module is for the signal after receiving the level conversion and transmits to output
End, recommending output mode module include recommending the third transistor being connected and the 4th transistor.
Preferably, the third transistor is PNP transistor, and the 4th transistor is NPN transistor.
Preferably, the recommending output mode module also includes the 7th resistance；The emitter stage of the third transistor is connected to
Two supply voltages, colelctor electrode are connected with one end of the 7th resistance；The grounded emitter of 4th transistor, colelctor electrode with
The other end of 7th resistance is connected；The base stage of the third transistor and the base stage of the 4th transistor receive the electricity
Flat turn change after signal.
Preferably, the recommending output mode module also includes diode and the 8th resistance；The anode of the diode with it is described
The emitter stage of 4th transistor is connected, and negative electrode is connected with the colelctor electrode of the 4th transistor；One termination of the 8th resistance
The negative electrode of the diode, another termination output end.
Preferably, the level switch module includes first resistor to the 6th resistance, the first transistor and the second crystal
Pipe；The first transistor and the second transistor are NPN transistor；One end of first resistor is connected to the first input
End, the other end are connected to control terminal；One end of second resistance is connected to first input end, and the other end is connected to the first crystal
The base stage of pipe；The colelctor electrode of the first transistor is connected to the first supply voltage, grounded emitter by 3rd resistor；It is described
The base stage of second transistor is connected to the colelctor electrode of the first transistor, and the colelctor electrode of the second transistor passes through the 5th electricity
Resistance is connected to the base stage of third transistor, the grounded emitter of the second transistor；One end of 4th resistance is connected to described
The base stage of third transistor, the other end are connected to second source voltage；One end of 6th resistance is connected to control terminal, and the other end connects
It is connected to the base stage of the 4th transistor.
Preferably, the single-wire communication circuit also includes data receiver circuit, and the data receiver circuit includes the 9th electricity
Hinder to the 11st resistance, the 5th transistor and electric capacity；The colelctor electrode of 5th transistor is connected to by the 9th resistance
Three supply voltages, grounded emitter；One end of the parallel circuit of tenth resistance and electric capacity composition is connected to the 5th transistor
Base stage, the other end ground connection；One end of 11st resistance is connected to the base stage of the 5th transistor, and the other end is connected to output end；
Second input is connected to the colelctor electrode of the 5th transistor.
Preferably, the 5th transistor is NPN transistor.
Preferably, when the single-wire communication circuit receives data, it is low level to put the control terminal so that the data
Transtation mission circuit is high-impedance state.
Technical solutions of the utility model, compared with prior art, at least have the following advantages that：
The utility model provides a kind of single-wire communication circuit, including data transtation mission circuit；The data transtation mission circuit includes
Level switch module and recommending output mode module；The level switch module is used for input signal and the control for receiving first input end
The control signal at end, level conversion is carried out to the input signal according to the control signal, and by the signal after level conversion
Transmit to recommending output mode module；The recommending output mode module is for the signal after receiving the level conversion and transmits to output
End, recommending output mode module include recommending the third transistor being connected and the 4th transistor, and the third transistor is positive-negative-positive crystal
Pipe, the 4th transistor is NPN transistor.Single-wire communication circuit driving force provided by the utility model is strong, transmission distance
From length, baud rate height and strong antijamming capability.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the theory diagram of a specific example of single-wire communication circuit in the utility model embodiment；
Fig. 2 is the circuit diagram of a specific example of data transtation mission circuit in the utility model embodiment；
Fig. 3 is the circuit diagram of a specific example of data receiver circuit in the utility model embodiment.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is the utility model part of the embodiment, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to which explanation, term " first ", " second ", " the 3rd " etc. are only used for retouching in description of the present utility model
Purpose is stated, and it is not intended that instruction or hint relative importance.
, it is necessary to illustrate in description of the present utility model, unless otherwise clearly defined and limited, term " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected；Can be joined directly together,
It can also be indirectly connected by intermediary, can also be the connection of two element internals.For the ordinary skill people of this area
For member, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Conflict can is not formed to be combined with each other.
The utility model embodiment provides a kind of single-wire communication circuit, as shown in figure 1, the single-wire communication circuit includes data
Transtation mission circuit；The data transtation mission circuit includes level switch module and recommending output mode module；Level switch module is used to receive the
One input TXD input signal and control terminal TRCTL control signal, the input signal is entered according to the control signal
Line level is changed, and the signal after level conversion is transmitted to recommending output mode module；The recommending output mode module is used to receive institute
State the signal after level conversion and transmit to output end UART, recommending output mode module include recommending the third transistor Q3 that is connected and
4th transistor Q4.Single-wire communication circuit driving force provided by the utility model is strong, transmission range is long, baud rate is high and anti-dry
It is strong to disturb ability.
In one embodiment, above-mentioned third transistor Q3 is PNP transistor, and above-mentioned 4th transistor Q4 is NPN
Transistor npn npn.
As shown in Fig. 2 above-mentioned recommending output mode module also includes the 7th resistance R7；Third transistor Q3 emitter stage is connected to
Second source voltage V2, colelctor electrode are connected with above-mentioned 7th resistance R7 one end；4th transistor Q4 grounded emitter GND,
Colelctor electrode is connected with the above-mentioned 7th resistance R7 other end；Third transistor Q3 base stage and the 4th transistor Q4 base stage receive
Signal after above-mentioned level conversion.
In a preferred embodiment, as shown in Fig. 2 above-mentioned recommending output mode module also includes diode D and the 8th resistance R8；
Diode D anode is connected with above-mentioned 4th transistor Q4 emitter stage, the colelctor electrode of negative electrode and above-mentioned 4th transistor Q4
It is connected；8th resistance R8 one end meets above-mentioned diode D negative electrode, another termination output end UART；As a kind of preferable real
Mode is applied, above-mentioned diode D is transient absorption diode.
Level switch module in the utility model embodiment includes first resistor R1 to the 6th resistance R6, the first transistor
Q1 and second transistor Q2；The first transistor Q1 and second transistor Q2 is NPN transistor；The one of first resistor R1
End is connected to first input end TXD, and the other end is connected to control terminal TRCTL；Second resistance R2 one end is connected to the first input
TXD is held, the other end is connected to the base stage of the first transistor Q1；The first transistor Q1 colelctor electrode is connected by 3rd resistor R3
It is connected to the first supply voltage V1, grounded emitter GND；Second transistor Q2 base stage is connected to above-mentioned the first transistor Q1 collection
Electrode, second transistor Q2 colelctor electrode are connected to third transistor Q3 base stage, second transistor Q2 by the 5th resistance R5
Grounded emitter GND；4th resistance R4 one end is connected to the base stage of above-mentioned third transistor, and the other end is connected to the second electricity
Source voltage V2；6th resistance R6 one end is connected to control terminal TRCTL, and the other end is connected to above-mentioned 4th transistor Q4 base
Pole.
The single-wire communication circuit that the utility model embodiment provides also includes data receiver circuit, as shown in figure 3, the data
Receiving circuit includes the 9th resistance R9 to the 11st resistance R11, the 5th transistor Q5 and electric capacity C；5th transistor Q5 is
NPN transistor, the 5th transistor Q5 colelctor electrode are connected to the 3rd supply voltage V3 by the 9th resistance R9, grounded emitter
GND；One end of the parallel circuit of tenth resistance R10 and electric capacity C compositions is connected to above-mentioned 5th transistor Q5 base stage, the other end
It is grounded GND；11st resistance R11 one end is connected to above-mentioned 5th transistor Q5 base stage, and the other end is connected to output end
UART；Second input RXD is connected to above-mentioned 5th transistor Q5 colelctor electrode.
The single-wire communication circuit that the utility model embodiment provides is when sending data, when first input end TXD is high electricity
It is flat, the first transistor Q1 forward bias and turn on, second transistor Q2 base potential is dragged down, second transistor Q2 is not led
Logical, the 4th resistance R4 makes third transistor Q3 forward bias and is in cut-off state, and because first input end TXD is high electricity
It is flat, the 4th transistor Q4 forward bias and turn on, drag down output end UART current potential, output end UART receives low level letter
Number；When sending data, when first input end TXD is low level, the first transistor Q1 is in cut-off state, now 3rd resistor R3
Second transistor Q2 base potential is dragged down, second transistor Q2 conductings, drags down third transistor Q3 base potential, the 3rd is brilliant
Body pipe Q3 reverse bias and turn on, and because first input end TXD is low level, the 4th transistor Q4 is in cut-off state, defeated
Go out to hold UART to receive high level signal.
For the single-wire communication circuit that the utility model embodiment provides when receiving data, the 9th resistance R9 makes the second input
Be high level under normality, when output end UART receives high level signal so that the 5th transistor Q5 be forward bias condition and
Conducting, so as to drag down the second input RXD current potential；Conversely, when output end UART receives low level signal, the 5th transistor
Q5 can not be turned on, therefore the second input RXD is in high level state.
As a preferred embodiment, above-mentioned single-wire communication circuit, when receiving data, control terminal TRCTL outputs are low
The control signal of level, pressure make the 4th transistor Q4 be in cut-off state, so that receiving under data mode, data are sent
Circuit is in high-impedance state all the time, in case data transtation mission circuit influences data receiver circuit and receives data.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (8)
1. a kind of single-wire communication circuit, it is characterised in that including data transtation mission circuit；
The data transtation mission circuit includes level switch module and recommending output mode module；
The level switch module is used for the control letter of the input signal for receiving first input end (TXD) and control terminal (TRCTL)
Number, level conversion is carried out to the input signal according to the control signal, and the signal after level conversion is transmitted to recommending
Output module；
The recommending output mode module is for the signal after receiving the level conversion and transmits to output end (UART), recommending output mode
Module includes recommending the third transistor (Q3) being connected and the 4th transistor (Q4).
2. single-wire communication circuit according to claim 1, it is characterised in that the third transistor (Q3) is that positive-negative-positive is brilliant
Body pipe, the 4th transistor (Q4) are NPN transistor.
3. single-wire communication circuit according to claim 2, it is characterised in that the recommending output mode module also includes the 7th electricity
Hinder (R7)；The emitter stage of the third transistor (Q3) is connected to second source voltage (V2), colelctor electrode and the 7th resistance
(R7) one end is connected；The grounded emitter (GND) of 4th transistor (Q4), colelctor electrode and the 7th resistance (R7)
The other end is connected；The base stage of the third transistor (Q3) and the base stage of the 4th transistor (Q4) receive the level conversion
Signal afterwards.
4. single-wire communication circuit according to claim 3, it is characterised in that the recommending output mode module also includes diode
And the 8th resistance (R8) (D)；
The anode of the diode (D) is connected with the emitter stage of the 4th transistor (Q4), negative electrode and the 4th transistor
(Q4) colelctor electrode is connected；
The negative electrode of the one termination diode (D) of the 8th resistance (R8), another termination output end (UART).
5. single-wire communication circuit according to claim 4, it is characterised in that the level switch module includes first resistor
To the 6th resistance (R1-R6), the first transistor (Q1) and second transistor (Q2)；
The first transistor (Q1) and the second transistor (Q2) are NPN transistor；
One end of first resistor (R1) is connected to first input end (TXD), and the other end is connected to control terminal (TRCTL)；
One end of second resistance (R2) is connected to first input end (TXD), and the other end is connected to the first transistor (Q1)
Base stage；
The colelctor electrode of the first transistor (Q1) is connected to the first supply voltage (V1) by 3rd resistor (R3), and emitter stage connects
Ground (GND)；
The base stage of the second transistor (Q2) is connected to the first transistor (Q1) colelctor electrode, the second transistor
(Q2) colelctor electrode is connected to third transistor (Q3) base stage, the hair of the second transistor (Q2) by the 5th resistance (R5)
Emitter grounding (GND)；
One end of 4th resistance (R4) is connected to the base stage of the third transistor, and the other end is connected to second source voltage
(V2)；
One end of 6th resistance (R6) is connected to control terminal (TRCTL), and the other end is connected to the base of the 4th transistor (Q4)
Pole.
6. according to any described single-wire communication circuits of claim 1-5, it is characterised in that also including data receiver circuit, institute
Stating data receiver circuit includes the 9th resistance to the 11st resistance (R9-R11), the 5th transistor (Q5) and electric capacity (C)；
The colelctor electrode of 5th transistor (Q5) is connected to the 3rd supply voltage (V3) by the 9th resistance (R9), and emitter stage connects
Ground (GND)；
One end of the parallel circuit of tenth resistance (R10) and electric capacity (C) composition is connected to the base stage of the 5th transistor (Q5),
The other end is grounded (GND)；
One end of 11st resistance (R11) is connected to the base stage of the 5th transistor (Q5), and the other end is connected to output end (UART)；
Second input (RXD) is connected to the colelctor electrode of the 5th transistor (Q5).
7. single-wire communication circuit according to claim 6, it is characterised in that the 5th transistor (Q5) is that NPN type is brilliant
Body pipe.
8. single-wire communication circuit according to claim 7, it is characterised in that when data is received, put the control terminal
(TRCTL) it is low level so that the data transtation mission circuit is high-impedance state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721048584.5U CN207010674U (en) | 2017-08-21 | 2017-08-21 | A kind of single-wire communication circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721048584.5U CN207010674U (en) | 2017-08-21 | 2017-08-21 | A kind of single-wire communication circuit |
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| CN207010674U true CN207010674U (en) | 2018-02-13 |
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| CN201721048584.5U Active CN207010674U (en) | 2017-08-21 | 2017-08-21 | A kind of single-wire communication circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395243A (en) * | 2017-08-21 | 2017-11-24 | 浙江曼瑞德舒适系统有限公司 | A kind of single-wire communication circuit |
| CN109743052A (en) * | 2019-03-04 | 2019-05-10 | 曼瑞德智能系统(上海)股份有限公司 | A kind of isolation communicating circuit for realizing self-test |
| CN112636316A (en) * | 2020-12-17 | 2021-04-09 | 潍柴动力股份有限公司 | Urea pump communication circuit and urea pump |
| CN114244390A (en) * | 2021-12-10 | 2022-03-25 | 深圳市精泰达科技有限公司 | Double-wire data and single-wire data communication conversion circuit |
-
2017
- 2017-08-21 CN CN201721048584.5U patent/CN207010674U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107395243A (en) * | 2017-08-21 | 2017-11-24 | 浙江曼瑞德舒适系统有限公司 | A kind of single-wire communication circuit |
| CN109743052A (en) * | 2019-03-04 | 2019-05-10 | 曼瑞德智能系统(上海)股份有限公司 | A kind of isolation communicating circuit for realizing self-test |
| CN109743052B (en) * | 2019-03-04 | 2024-04-30 | 曼瑞德智能系统(上海)股份有限公司 | Isolation communication circuit for realizing self-checking |
| CN112636316A (en) * | 2020-12-17 | 2021-04-09 | 潍柴动力股份有限公司 | Urea pump communication circuit and urea pump |
| CN114244390A (en) * | 2021-12-10 | 2022-03-25 | 深圳市精泰达科技有限公司 | Double-wire data and single-wire data communication conversion circuit |
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