CN209151108U - Linear potentiometer signal conditioning circuit - Google Patents
Linear potentiometer signal conditioning circuit Download PDFInfo
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- CN209151108U CN209151108U CN201821888268.3U CN201821888268U CN209151108U CN 209151108 U CN209151108 U CN 209151108U CN 201821888268 U CN201821888268 U CN 201821888268U CN 209151108 U CN209151108 U CN 209151108U
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Abstract
The utility model relates to a kind of linear potentiometer signal conditioning circuits, solve the deficiencies in the prior art, technical solution are as follows: feeder ear connects 5V power supply, with the end P0T+ of linear potentiometer, the end P0T- is connected with the end FEED BACK, feedback output INHIBIT signal, it is characterized by comprising power circuits, feedback follows circuit and signal to follow circuit, the input terminal of the power circuit connects 5V power supply, the output end of power circuit is 3.3V voltage output end, the end P0T+ of linear potentiometer is connect with 3.3V voltage output end, feedback follows the input terminal of circuit to connect with the end linear potentiometer FEED BACK, it is INHIBIT signal output end that feedback, which follows the output end of circuit, feedback follows the feeder ear of circuit to connect 5V power supply, signal follows electricity The input terminal on road is connect with 3.3V voltage output end, and signal follows the output end of circuit and the end P0T- of linear potentiometer to connect.
Description
Technical field
The utility model relates to a kind of conditioning circuits, and in particular to a kind of linear potentiometer signal conditioning circuit.
Background technique
Existing linear potentiometer signal conditioning circuit, input impedance is low, and the influence of input signal can be done in this way
To very greatly；And output impedance is higher, such output signal is affected to circuit below.So developing a kind of main use
It powers in linear potentiometer, processing linear potentiometer feedback signal effect can generate one " isolation " to front and back circuit, rise
The linear potentiometer signal conditioning circuit for having arrived the effect of signal condition is imperative.
For example, Chinese patent 106936396A, discloses a kind of conditioning circuit of Vibration Signal in Frequency Domain in July, 2017,
It is characterised in that it includes power-supply system, sensor, pulse signal conditioning module, converter, microprocessor and serial communication
Circuit, the sensor, pulse signal conditioning module, converter, microprocessor and serial communication circuit are sequentially connected, institute
It states power-supply system to connect with sensor, pulse signal conditioning module, converter, microprocessor and serial communication circuit, be used for
For each module for power supply of system；The pulse signal conditioning module includes pre-amplification circuit, zeroing circuit, trap circuit, band logical
Filter circuit, voltage lifting circuit, the sensor, pre-amplification circuit, zeroing circuit, trap circuit, bandpass filtering electricity
Road, voltage lifting circuit, converter are sequentially connected；The signal that the pre-amplification circuit is used to for sensor being passed to carries out
Linear Amplifer and elimination interference signal, the zeroing circuit is for eliminating drift effect caused by outer signals, the trap
Circuit is used for circuit filtering for eliminating Hz noise, the bandwidth-limited circuit, and the voltage lifting circuit is adder electricity
Road, the adder circuit is for avoiding not occurring negative peak distortion when AD conversion.But existing linear potentiometer signal condition
Circuit, input impedance is low, the influence of input signal can be accomplished so very big；And output impedance is higher, exports in this way
Signal is affected to circuit below.
Utility model content
Utility model aims to solve the above-mentioned prior arts there are existing linear potentiometer signal conditioning circuit,
Input impedance is low, the influence of input signal can be accomplished so very big；And output impedance is higher, such output signal pair
The problem of being affected of circuit below provides a kind of linear potentiometer signal conditioning circuit.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of linear potentiometer signal condition electricity
Road, feeder ear connect 5V power supply, connect with the end P0T+ of linear potentiometer, the end P0T- and the end FEED BACK, feedback output
INHIBIT signal, including power circuit, feedback follow circuit and signal to follow circuit, the input terminal connection of the power circuit
5V power supply, the output end of power circuit are 3.3V voltage output end, and the end P0T+ of linear potentiometer and 3.3V voltage output end connect
It connects, feedback follows the input terminal of circuit to connect with the end linear potentiometer FEED BACK, feeds back and follows the output end of circuit to be
INHIBIT signal output end, feedback follow the feeder ear of circuit to connect 5V power supply, and signal follows the input terminal and 3.3V electricity of circuit
Output end connection is pressed, signal follows the output end of circuit and the end P0T- of linear potentiometer to connect.Power circuit has mainly used one
+ 5V is depressured into+3.3V by LDO linear voltage decreasing chip.For powering to linear potentiometer.Circuit and signal are followed by feedback
The signal conditioning circuit for following circuit to constitute, for INHIBIT signal and POT1- signal, used voltage follower circuit into
Row conditioning.The distinguishing feature of voltage follower is exactly: (1) input impedance is high, and the influence of input signal can be accomplished in this way
Very little；(2) output impedance is low, and influence of such output signal to circuit below can accomplish very little.So using voltage follow
Device can generate the effect of one " isolation " to front and back circuit, thus play the role of signal condition.
Preferably, the power circuit includes zener diode ZD1, inductance L1, inductance L2, capacitor C1, capacitor C2, electricity
Holding C3, capacitor C4, capacitor C5 and voltage stabilizing chip IC1, the voltage stabilizing chip IC1 is TPS73633DBVR chip, voltage stabilizing chip IC1
The 1st pin connect with the 3rd pin of voltage stabilizing chip IC1, the 1st pin of voltage stabilizing chip IC1 by inductance L1 with to connect 5V electric
The cathode in source, zener diode ZD1 connects 5V power supply, the plus earth of zener diode ZD1, the 1st pin of voltage stabilizing chip IC1
It being grounded by capacitor C1, the 1st pin of voltage stabilizing chip IC1 also passes through capacitor C2 and is grounded, the 2nd pin ground connection of voltage stabilizing chip IC1,
The pin of voltage stabilizing chip IC1 is grounded by capacitor C3, and the 5th pin of voltage stabilizing chip IC1 is grounded by capacitor C4, voltage stabilizing chip
The first end of the 5th pin connection inductance L2 of IC1, the second end of inductance L2 is 3.3V voltage output end, the second end of inductance L2
It is grounded by capacitor C5.
Preferably, it includes amplifier U1A, inductance L3, resistance R1, capacitor C6 and capacitor C7, amplifier U1A that feedback, which follows circuit,
Negative input end connect with the output end of amplifier U1A, the positive input terminal of amplifier U1A is connect with the end linear potentiometer FEED BACK,
The power end of amplifier U1A is grounded by capacitor C6, and for the power end of amplifier U1A by inductance L3 connection 5V power supply, amplifier U1A's is defeated
Outlet is connect with the first end of resistance R1, and the second end of resistance R1 is the feedback output end of INHIBIT signal, and the second of resistance R1
End is grounded by capacitor C7.
Preferably, it includes amplifier U1C, resistance R5, resistance R7 and resistance R2, the amplifier that the signal, which follows circuit,
The positive input terminal of U1C is connect by resistance R5 with 3.3V voltage output end, and the positive input terminal of amplifier U1C also passes through resistance R7 and connects
The negative input end on ground, amplifier U1C is connect with the second end of resistance R2, and the first end of resistance R2 is connect with the output end of amplifier U1C,
The output end of amplifier U1C is connect with the first end of resistance R2, and the second end of resistance R2 and the end P0T- of linear potentiometer connect.
The substantial effect of the utility model is: (1) input impedance is high, and the influence of input signal can be accomplished in this way
Very little；(2) output impedance is low, and influence of such output signal to circuit below can accomplish very little.So using voltage follow
Device can generate the effect of one " isolation " to front and back circuit, thus play the role of signal condition.
Detailed description of the invention
Fig. 1 is first part's circuit diagram of the utility model.
Fig. 2 is the second part circuit diagram of the utility model.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, the technical solution of the utility model is made further specifically
It is bright.
Embodiment 1:
A kind of linear potentiometer signal conditioning circuit (referring to attached drawing 1), feeder ear connects 5V power supply, with linear potentiometer
The end P0T+, the end P0T- are connected with the end FEED BACK, feedback output INHIBIT signal, including power circuit, feedback follow circuit
Circuit is followed with signal, the input terminal of the power circuit connects 5V power supply, and the output end of power circuit is 3.3V voltage output
End, the end P0T+ of linear potentiometer are connect with 3.3V voltage output end, and feedback follows the input terminal and linear potentiometer of circuit
The connection of the end FEED BACK, it is INHIBIT signal output end that feedback, which follows the output end of circuit, and feedback follows the feeder ear of circuit
5V power supply is connected, signal follows the input terminal of circuit to connect with 3.3V voltage output end, and signal follows the output end and line of circuit
Property potentiometer the end P0T- connection.The power circuit includes zener diode ZD1, inductance L1, inductance L2, capacitor C1, capacitor
C2, capacitor C3, capacitor C4, capacitor C5 and voltage stabilizing chip IC1, the voltage stabilizing chip IC1 are TPS73633DBVR chip, pressure stabilizing core
The 1st pin of piece IC1 is connect with the 3rd pin of voltage stabilizing chip IC1, the 1st pin of voltage stabilizing chip IC1 by inductance L1 with connect
5V power supply, the cathode connection 5V power supply of zener diode ZD1, the plus earth of zener diode ZD1, the 1st of voltage stabilizing chip IC1 the
Pin is grounded by capacitor C1, and the 1st pin of voltage stabilizing chip IC1 also passes through capacitor C2 and is grounded, the 2nd pin of voltage stabilizing chip IC1
Ground connection, the pin of voltage stabilizing chip IC1 are grounded by capacitor C3, and the 5th pin of voltage stabilizing chip IC1 is grounded by capacitor C4, surely
The first end of the 5th pin connection inductance L2 of chip IC 1 is pressed, the second end of inductance L2 is 3.3V voltage output end, inductance L2's
Second end is grounded by capacitor C5.It includes amplifier U1A, inductance L3, resistance R1, capacitor C6 and capacitor C7, fortune that feedback, which follows circuit,
The negative input end for putting U1A is connect with the output end of amplifier U1A, the positive input terminal of amplifier U1A and the end linear potentiometer FEED BACK
Connection, the power end of amplifier U1A are grounded by capacitor C6, and the power end of amplifier U1A passes through inductance L3 connection 5V power supply, amplifier
The output end of U1A is connect with the first end of resistance R1, and the second end of resistance R1 is the feedback output end of INHIBIT signal, resistance
The second end of R1 is grounded by capacitor C7.It includes amplifier U1C, resistance R5, resistance R7 and resistance R2, institute that the signal, which follows circuit,
The positive input terminal for stating amplifier U1C is connect by resistance R5 with 3.3V voltage output end, and the positive input terminal of amplifier U1C also passes through resistance
R7 ground connection, the negative input end of amplifier U1C are connect with the second end of resistance R2, the first end of resistance R2 and the output end of amplifier U1C
Connection, the output end of amplifier U1C are connect with the first end of resistance R2, and the second end of resistance R2 and the end P0T- of linear potentiometer connect
It connects.Power circuit has mainly used a LDO linear voltage decreasing chip, and+5V is depressured into+3.3V.For powering to linear potentiometer.
The signal conditioning circuit for following circuit and signal that circuit is followed to constitute by feedback makes INHIBIT signal and POT1- signal
It is improved with voltage follower circuit.The distinguishing feature of voltage follower is exactly: (1) input impedance is high, in this way for defeated
The influence for entering signal can accomplish very little；(2) output impedance is low, and influence of such output signal to circuit below can be accomplished very
It is small.So can generate the effect of one " isolation " to front and back circuit using voltage follower, thus play signal tune
The effect of reason.
Embodiment described above is a kind of preferable scheme of the utility model, is not made to the utility model any
Formal limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (4)
1. a kind of linear potentiometer signal conditioning circuit, feeder ear connects 5V power supply, with the end P0T+ of linear potentiometer, P0T-
End is connected with the end FEED BACK, feedback output INHIBIT signal, it is characterised in that: follows circuit including power circuit, feedback
Circuit is followed with signal, the input terminal of the power circuit connects 5V power supply, and the output end of power circuit is 3.3V voltage output
End, the end P0T+ of linear potentiometer are connect with 3.3V voltage output end, and feedback follows the input terminal and linear potentiometer of circuit
The connection of the end FEED BACK, it is INHIBIT signal output end that feedback, which follows the output end of circuit, and feedback follows the feeder ear of circuit
5V power supply is connected, signal follows the input terminal of circuit to connect with 3.3V voltage output end, and signal follows the output end and line of circuit
Property potentiometer the end P0T- connection.
2. linear potentiometer signal conditioning circuit according to claim 1, it is characterised in that: the power circuit includes steady
Press diode ZD1, inductance L1, inductance L2, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5 and voltage stabilizing chip IC1, institute
Stating voltage stabilizing chip IC1 is TPS73633DBVR chip, and the 1st pin of voltage stabilizing chip IC1 and the 3rd pin of voltage stabilizing chip IC1 connect
It connecing, the 1st pin of voltage stabilizing chip IC1 connects 5V power supply with 5V power supply, the cathode of zener diode ZD1 is connect by inductance L1,
1st pin of the plus earth of zener diode ZD1, voltage stabilizing chip IC1 is grounded by capacitor C1, and the 1st of voltage stabilizing chip IC1 is drawn
Foot also passes through capacitor C2 and is grounded, and the 2nd pin ground connection of voltage stabilizing chip IC1, the pin of voltage stabilizing chip IC1 is connect by capacitor C3
5th pin on ground, voltage stabilizing chip IC1 is grounded by capacitor C4, the first end of the 5th pin connection inductance L2 of voltage stabilizing chip IC1,
The second end of inductance L2 is 3.3V voltage output end, and the second end of inductance L2 is grounded by capacitor C5.
3. linear potentiometer signal conditioning circuit according to claim 1, it is characterised in that: it includes fortune that feedback, which follows circuit,
U1A, inductance L3, resistance R1, capacitor C6 and capacitor C7 are put, the negative input end of amplifier U1A is connect with the output end of amplifier U1A, fortune
The positive input terminal for putting U1A is connect with the end linear potentiometer FEED BACK, and the power end of amplifier U1A is grounded by capacitor C6, amplifier
The power end of U1A is connect by inductance L3 connection 5V power supply, the output end of amplifier U1A with the first end of resistance R1, resistance R1's
Second end is the feedback output end of INHIBIT signal, and the second end of resistance R1 is grounded by capacitor C7.
4. linear potentiometer signal conditioning circuit according to claim 1, it is characterised in that: the signal follows circuit packet
The positive input terminal for including amplifier U1C, resistance R5, resistance R7 and resistance R2, the amplifier U1C passes through resistance R5 and 3.3V voltage output
End connection, the positive input terminal of amplifier U1C also pass through resistance R7 and are grounded, and the negative input end of amplifier U1C and the second end of resistance R2 connect
It connects, the first end of resistance R2 is connect with the output end of amplifier U1C, and the output end of amplifier U1C is connect with the first end of resistance R2, electricity
The end P0T- of the second end and linear potentiometer that hinder R2 connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821888268.3U CN209151108U (en) | 2018-11-16 | 2018-11-16 | Linear potentiometer signal conditioning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821888268.3U CN209151108U (en) | 2018-11-16 | 2018-11-16 | Linear potentiometer signal conditioning circuit |
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| CN209151108U true CN209151108U (en) | 2019-07-23 |
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| CN201821888268.3U Active CN209151108U (en) | 2018-11-16 | 2018-11-16 | Linear potentiometer signal conditioning circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323948A (en) * | 2020-04-07 | 2020-06-23 | 深圳市爱图仕影像器材有限公司 | Drive circuit of liquid crystal light valve, liquid crystal light valve and LED lamp |
-
2018
- 2018-11-16 CN CN201821888268.3U patent/CN209151108U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323948A (en) * | 2020-04-07 | 2020-06-23 | 深圳市爱图仕影像器材有限公司 | Drive circuit of liquid crystal light valve, liquid crystal light valve and LED lamp |
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