CN206077358U - Bidirectional digital signal level-conversion circuit - Google Patents
Bidirectional digital signal level-conversion circuit Download PDFInfo
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- CN206077358U CN206077358U CN201621035656.8U CN201621035656U CN206077358U CN 206077358 U CN206077358 U CN 206077358U CN 201621035656 U CN201621035656 U CN 201621035656U CN 206077358 U CN206077358 U CN 206077358U
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Abstract
The utility model discloses a kind of bidirectional digital signal level-conversion circuit, is related to the communications field.The circuit includes the first signal end, secondary signal end, audion Q1 and semiconductor diode D1；First signal end is connected with the positive pole of the emitter stage and semiconductor diode D1 of audion Q1 respectively, the base stage of audion Q1 is connected with VDD, the emitter stage of audion Q1 is grounded after being also connected with electric capacity C1, it is grounded after the colelctor electrode connection electric capacity C2 of audion Q1, secondary signal end colelctor electrode respectively with audion Q1, the negative pole of semiconductor diode D1 and VCC are connected.This utility model simple structure, debugging easily, are conveniently keeped in repair.
Description
Technical field
This utility model is related to the communications field, more particularly to a kind of bidirectional digital signal level-conversion circuit.
Background technology
General signal level conversion is all realizing, and to need software to control digital signal by IC
Flow direction, not only high expensive but also software are realized difficult.
Utility model content
The purpose of this utility model is to provide a kind of bidirectional digital signal level-conversion circuit, so as to solve prior art
Present in foregoing problems.
To achieve these goals, circuit described in the utility model includes the first signal end, secondary signal end, audion Q1
With semiconductor diode D1；First signal end is connected with the positive pole of the emitter stage and semiconductor diode D1 of audion Q1 respectively,
The base stage of audion Q1 is connected with VDD, and the emitter stage of audion Q1 is grounded after being also connected with electric capacity C1, and the colelctor electrode of audion Q1 connects
Connect, secondary signal end colelctor electrode respectively with audion Q1, the negative pole of semiconductor diode D1 and VCC connect
Connect.
Preferably, the first signal end by resistance R3 respectively with the emitter stage and semiconductor diode D1 of audion Q1 just
Pole connects, and the resistance R3 is 10 Ω.
Preferably, secondary signal end is negative with the colelctor electrode and semiconductor diode D1 of audion Q1 respectively by resistance R4
Pole connects, and secondary signal end sequentially passes through resistance R4 and resistance R1 is connected with VCC；The resistance R4 is 10 Ω, the resistance R1
For 10K.
Preferably, resistance R2 is set in the base stage of the audion Q1 and VDD connecting wires, the R2 is 10K.
Preferably, the first signal end and secondary signal end receive or export the digital signal of below 5M bandwidth.
Preferably, model S9013 of audion Q1；Model BAT54C of semiconductor diode D1；VDD is supplied for 3.3V
Power supply；VCC is 5V power supplies.
Preferably, the first signal end input 3.3V digital signals；Secondary signal end exports 5.0V digital signals.
Preferably, the first signal end output 2.8V digital signals；Secondary signal end is input into 5.0V digital signals.
The beneficial effects of the utility model are：
This utility model is constituted using separate type device, simple structure, tune in line with design, cost-effective theory is simplified
Examination easily, is conveniently keeped in repair.
Hardware designs are simplified by this utility model, software processes link is reduced, production cost is reduced, widely can be answered
Use in the low frequency digital level shifting circuit of all trades and professions.
Description of the drawings
Fig. 1 is bidirectional digital signal level-conversion circuit structural representation；
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing, to this reality
It is further elaborated with new.It should be appreciated that specific embodiment described herein is only to explain this practicality
It is new, it is not used to limit this utility model.
Embodiment
Bidirectional digital signal level-conversion circuit described in the present embodiment, the first signal end, secondary signal end, audion Q1 and
Semiconductor diode D1；First signal end is connected with the positive pole of the emitter stage and semiconductor diode D1 of audion Q1 respectively, and three
The base stage of pole pipe Q1 is connected with VDD, and the emitter stage of audion Q1 is grounded after being also connected with electric capacity C1, the colelctor electrode connection of audion Q1
It is grounded after electric capacity C2, secondary signal end colelctor electrode respectively with audion Q1, the negative pole of semiconductor diode D1 and VCC are connected.
Explanation is explained in more detail is：
(1) first signal end passes through resistance R3 positive poles respectively with the emitter stage and semiconductor diode D1 of audion Q1
Connection, the resistance R3 are 10 Ω.
Secondary signal end is connected with the negative pole of the colelctor electrode and semiconductor diode D1 of audion Q1 respectively by resistance R4,
Secondary signal end sequentially passes through resistance R4 and resistance R1 is connected with VCC；The resistance R4 is 10 Ω, and the resistance R1 is 10K.
Resistance R2 is set in the base stage of the audion Q1 and VDD connecting wires, the R2 is 10K.
(2) first signal end S1 and secondary signal end S2 receive or export the digital signal of below 5M bandwidth.
(3) model S9013 of audion Q1；Model BAT54C of semiconductor diode D1；VDD powers for 3.3V
Power supply；VCC is 5V power supplies.
When the first signal end is used as signal input part, when secondary signal end is as signal output part, the input of the first signal end
3.3V digital signals, secondary signal end output 5.0V digital signals；
When the first signal end is used as signal output part, when secondary signal end is as signal input part, the output of the first signal end
2.8V digital signal；Secondary signal end is input into 5.0V digital signals.
Operation principle of the present utility model：(remarks：Digital signal is the square wave of height change)
1st, used as signal input part, S2 is used as signal output part for S1：When S1 incoming levels are 3.3V, Jing R3 are added to Q1's
The voltage of emitter stage is 3.3V, and it is 3.3V that VDD Jing R2 are added to the voltage of the base stage of Q1, and now the voltage difference between the BE poles of Q1 is
0V, Q1 end, and VCC Jing R1, R4 are sent to S2 level and are not diverted to S1 by Q1, and S2 output levels are 5V.When S1 incoming levels are
During 0V, it is 0V that Jing R3 are added to the voltage of the emitter stage of Q1, and VDD Jing R2 are added to the voltage of the base stage of Q1 because the BE knot conductings of Q1 are clamped
In 0.6V or so, Q1 conductings, VCC Jing R1, R4 are sent to the voltage of S2 and are diverted to S1 by Q1, and S1 is now 0V, then S2 is defeated for position
Go out level and be also changed into 0V.Level conversion of the signal of a cycle from 3.3V to 5V is just completed so.
2nd, used as signal input part, S1 is used as signal output part for S2：When S2 incoming levels are 5V, Jing R4 are sent to D1 negative poles
Voltage be 5V, the BE knots of VDD Jing R2, Q1 are sent to the just extremely 2.8V of D1, because D1 ends, Jing R3 be sent to the level of S1 not by
D1 is diverted to S2, and S1 output levels are 2.8V, equivalent to high level for digital signal.When S2 incoming levels are 0V,
It is 0V that Jing R4 are sent to the voltage of the negative pole of D1, and the voltage of positive pole that the BE knots of VDD Jing R2, Q1 are sent to D1 is clamped because of the conducting of D1
In 0.15V or so, Jing R3 are sent to S1 output level 0.15V or so, for digital signal is equivalent to 0V for position.One is just completed so
Level conversion of the signal in individual cycle from 5V to 2.8V.
By using above-mentioned technical proposal disclosed in this utility model, having obtained following beneficial effect：
This utility model is constituted using separate type device, simple structure, tune in line with design, cost-effective theory is simplified
Examination easily, is conveniently keeped in repair.
Hardware designs are simplified by this utility model, software processes link is reduced, production cost is reduced, widely can be answered
Use in the low frequency digital level shifting circuit of all trades and professions.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model principle, some improvements and modifications can also be made, these improve and
Retouching should also regard protection domain of the present utility model.
Claims (8)
1. a kind of bidirectional digital signal level-conversion circuit, it is characterised in that the circuit includes the first signal end, secondary signal
End, audion Q1 and semiconductor diode D1；
First signal end is connected with the positive pole of the emitter stage and semiconductor diode D1 of audion Q1 respectively, the base stage of audion Q1
It is connected with VDD, the emitter stage of audion Q1 is grounded after being also connected with electric capacity C1, the colelctor electrode connection electric capacity C2 of audion Q1 is followed by
Ground, secondary signal end colelctor electrode respectively with audion Q1, the negative pole of semiconductor diode D1 and VCC are connected.
2. bidirectional digital signal level-conversion circuit according to claim 1, it is characterised in that the first signal end passes through resistance
R3 is connected with the positive pole of the emitter stage and semiconductor diode D1 of audion Q1 respectively, and the resistance R3 is 10 Ω.
3. bidirectional digital signal level-conversion circuit according to claim 1, it is characterised in that secondary signal end passes through resistance
R4 is connected with the negative pole of the colelctor electrode and semiconductor diode D1 of audion Q1 respectively, secondary signal end sequentially pass through resistance R4 and
Resistance R1 is connected with VCC；
The resistance R4 is 10 Ω, and the resistance R1 is 10K.
4. bidirectional digital signal level-conversion circuit according to claim 1, it is characterised in that the base stage of the audion Q1
With setting resistance R2 in VDD connecting wires, the R2 is 10K.
5. bidirectional digital signal level-conversion circuit according to claim 1, it is characterised in that the first signal end and the second letter
Number end receive or export below 5M bandwidth digital signal.
6. bidirectional digital signal level-conversion circuit according to claim 1, it is characterised in that the model of audion Q1
S9013；Model BAT54C of semiconductor diode D1；VDD is 3.3V power supplies；VCC is 5V power supplies.
7. bidirectional digital signal level-conversion circuit according to claim 1, it is characterised in that the first signal end is input into 3.3V
Digital signal；Secondary signal end exports 5.0V digital signals.
8. bidirectional digital signal level-conversion circuit according to claim 1, it is characterised in that the first signal end exports 2.8V
Digital signal；Secondary signal end is input into 5.0V digital signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035656.8U CN206077358U (en) | 2016-08-31 | 2016-08-31 | Bidirectional digital signal level-conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035656.8U CN206077358U (en) | 2016-08-31 | 2016-08-31 | Bidirectional digital signal level-conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206077358U true CN206077358U (en) | 2017-04-05 |
Family
ID=58438582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621035656.8U Active CN206077358U (en) | 2016-08-31 | 2016-08-31 | Bidirectional digital signal level-conversion circuit |
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| Country | Link |
|---|---|
| CN (1) | CN206077358U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769829A (en) * | 2020-07-22 | 2020-10-13 | 上海客益电子有限公司 | Signal conversion circuit supporting positive and negative connection |
-
2016
- 2016-08-31 CN CN201621035656.8U patent/CN206077358U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769829A (en) * | 2020-07-22 | 2020-10-13 | 上海客益电子有限公司 | Signal conversion circuit supporting positive and negative connection |
| CN111769829B (en) * | 2020-07-22 | 2023-12-08 | 上海先积集成电路有限公司 | Signal conversion circuit supporting forward and reverse connection |
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