CN108345556A - The circuit for signal conditioning of electronic product control device - Google Patents

Abstract

The invention discloses a signal adjustment circuit of an electronic product control device, comprising a signal receiving circuit, a differential feedback circuit and a voltage stabilizing output circuit. The differential feedback circuit is divided into two ways to receive the signal output by the receiving circuit. The triode Q2 is the feedback signal of the emitter pole, which adjusts the potential of the inverting input terminal of the operational amplifier AR1 to adjust the signal amplitude and feedback the stable signal. Finally, the voltage is output The circuit receives the output signal of the differential feedback circuit, uses the voltage regulator circuit composed of the triode Q3 and the voltage regulator D7 to stabilize the voltage, and designs the LC circuit composed of the inductance L2 and the capacitor C1 in parallel to filter and output, that is, the input to the control device of the electronic product In the signal transmission channel of the signal adjustment circuit, the signal in the signal transmission channel of the signal adjustment circuit of the low-voltage electronic product control device is stabilized, and the anti-interference performance of the signal is improved.

Description

Signal Conditioning Circuits for Control Electronics

technical field

The invention relates to the technical field of signal adjustment, in particular to a signal adjustment circuit of an electronic product control device.

Background technique

With the development of science and technology, various electronic products have developed accordingly. Electronic products have now become an indispensable part of people's lives and have brought great convenience to people's life. The signal conditioning circuit of the electronic product control device is an electronic It is a relatively important component in the use of products. Among them, the signal in the signal transmission channel of the signal conditioning circuit of the low-voltage electronic product control device is prone to instability, and it is easily caused by electromagnetic interference from other similar electronic products. Disturbance may even cause electronic products to generate error messages, which not only affects the service life of low-voltage electronic products, but also seriously affects the user experience.

So the present invention provides a new solution to solve this problem.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a signal conditioning circuit for an electronic product control device, which has the characteristics of ingenious design and humanized design, and effectively stabilizes the signal conditioning circuit for a low-voltage electronic product control device. The signals in the signal transmission channel improve the anti-interference of the signal.

The technical solution is that the signal adjustment circuit of the electronic product control device includes a signal receiving circuit, a differential feedback circuit and a voltage stabilizing output circuit. signal, the differential feedback circuit is divided into two ways to receive the signal output by the signal receiving circuit, and one way is input to the non-inverting input terminal of the operational amplifier AR2 and the non-inverting input terminal of the operational amplifier AR3 after being limited by the sliding rheostat RW2. At the same time, the power supply +10V is The non-inverting input terminal of the operational amplifier AR2 and the non-inverting input terminal of the operational amplifier AR3 provide the base potential, and the other channel passes through the inverting amplifier of the operational amplifier AR4, and the output signal of the operational amplifier AR4 is the base potential of the inverting input terminal of the operational amplifier AR1 , the operational amplifier AR2 and the operational amplifier AR1 form a differential circuit, the static operating point of the stable signal voltage, the output signal of the operational amplifier AR2 is input into the voltage-stabilized output circuit, and the output signal of the operational amplifier AR2 is input into the operational amplifier AR3 In the non-inverting input terminal of the operational amplifier AR3, the in-phase amplified signal of the operational amplifier AR3 is the base potential of the triode Q2, and the triode Q2 is the feedback signal of the emitter pole, and the potential of the inverting input terminal of the operational amplifier AR1 is adjusted to adjust the signal amplitude and feedback the stable signal. , and finally the regulated output circuit receives the output signal of the differential feedback circuit, uses the regulated circuit composed of the triode Q3 and the regulated tube D7 to stabilize the voltage, and designs the LC circuit composed of the inductance L2 and the capacitor C1 in parallel to output after filtering, that is, the input In the signal transmission channel of the signal conditioning circuit of the electronic product control device;

The differential feedback circuit includes an operational amplifier AR4, the inverting input terminal of the operational amplifier AR4 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the negative pole of the diode D2, and the non-inverting input terminal of the operational amplifier AR4 is connected to the resistor R4 and the resistor One end of R11, the other end of resistor R4 is grounded, the other end of resistor R11 is connected to the output end of op amp AR4 and one end of resistor R10, the other end of resistor R10 is connected to the inverting input end of op amp AR1 and the emission of transistor Q2 pole, the non-inverting input terminal of op amp AR1 is connected to resistor R12, one end of resistor R13, the other end of resistor R12 is grounded, the output terminal of op amp AR1 is connected to the other end of resistor R13 and resistor R8, one end of resistor R9, resistor R9 The other end of the resistor R8 is connected to the collector of the transistor Q2, the other end of the resistor R8 is connected to the contact 2 of the sliding rheostat RW1, the contact 3 of the sliding rheostat RW1 is connected to the contact 1 of the sliding rheostat RW1, one end of the resistor R6 and the op amp AR2 The inverting input terminal, the other end of the resistor R6 is connected to the output terminal of the operational amplifier AR2 and one end of the resistor R7, resistor R14, and resistor R20, the other end of the resistor R20 is connected to the positive pole of the diode D8, and the non-inverting input terminal of the operational amplifier AR2 is connected to One end of the resistor R5 and the other end of the resistor R14, the other end of the resistor R5 is connected to one end of the inductor L3 and the positive pole of the diode D4, the other end of the inductor L3 is connected to the contact 2 of the sliding rheostat RW2, and the contact 3 of the sliding rheostat RW2 is connected to the diode The negative pole of D3, the contact 1 of the sliding rheostat RW2 is connected to the negative pole of the diode D6, the positive pole of the diode D6 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the positive pole of the diode D5 and one end of the resistor R1, and the other end of the resistor R1 is connected to the power supply +10V, the cathode of the diode D5 is grounded, the cathode of the diode D4 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to the cathode of the diode D8 and the non-inverting input terminal of the operational amplifier AR3, and the inverting input terminal of the operational amplifier AR3 is connected to the resistor R17, one end of the resistor R18, the other end of the resistor R18 is grounded, and the output terminal of the operational amplifier AR3 is connected to the other end of the resistor R17 and the base of the transistor Q2.

Due to the adoption of the above technical solutions, the present invention has the following advantages compared with the prior art;

1. The signal receiving circuit receives the signal at the input end of the signal transmission channel in the signal conditioning circuit of the electronic product control device, the differential feedback circuit is divided into two channels to receive the signal output by the signal receiving circuit, and the output signal of the operational amplifier AR2 is input to the voltage-stabilizing output circuit At the same time, the output signal of the operational amplifier AR2 is input into the non-inverting input terminal of the operational amplifier AR3. The in-phase amplified signal of the operational amplifier AR3 is the base potential of the triode Q2, and the triode Q2 is the feedback signal of the emitter pole. Adjust the anti-phase of the operational amplifier AR1 The potential of the input terminal plays the role of adjusting the signal amplitude and feeding back the stable signal. Finally, the voltage stabilizing output circuit receives the output signal of the differential feedback circuit, uses the voltage stabilizing circuit composed of the triode Q3 and the voltage stabilizing tube D7 to stabilize the voltage, and designs the inductor L2 and The LC circuit composed of capacitor C1 connected in parallel is filtered and output, which is input into the signal transmission channel of the signal conditioning circuit of the electronic product control device, effectively stabilizing the signal in the signal transmission channel of the signal conditioning circuit of the low-voltage electronic product control device, improving signal anti-interference.

2. The operational amplifier AR2 and the operational amplifier AR1 form a differential circuit to stabilize the static operating point of the signal voltage and improve the anti-interference of the signal. Since the signal received by the non-inverting input of the operational amplifier AR3 is the differential circuit of the operational amplifier AR2 and AR1 The processed signal and the signal filtered by the inductor L3 can more accurately control the feedback of the transistor Q2. The transistor Q2 is the feedback signal of the emitter. When the signal amplitude is abnormal, the transistor Q2 is turned on at this time, and the transistor Q2 is the feedback signal of the emitter. The potential of the inverting input terminal of the operational amplifier AR1 becomes larger, that is, the potential of the output terminal of the operational amplifier AR1 decreases, and the potential of the inverting input terminal of the operational amplifier AR1 is adjusted to adjust the signal amplitude and feedback the stable signal.

Description of drawings

FIG. 1 is a block diagram of the signal conditioning circuit of the electronic product control device of the present invention.

FIG. 2 is a schematic diagram of the signal conditioning circuit of the electronic product control device of the present invention.

Detailed ways

The aforementioned and other technical contents, features and functions of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings 1 to 2 . The structural contents mentioned in the following embodiments are all based on the accompanying drawings of the description.

Embodiment 1, the signal adjustment circuit of the electronic product control device includes a signal receiving circuit, a differential feedback circuit and a voltage stabilization output circuit, the signal receiving circuit receives the signal at the input end of the signal transmission channel in the signal adjustment circuit of the electronic product control device, the The differential feedback circuit is divided into two channels to receive the signal output from the receiving circuit. One channel is limited by the sliding rheostat RW2 and then input to the non-inverting input terminal of the operational amplifier AR2 and the non-inverting input terminal of the operational amplifier AR3. At the same time, the power supply +10V is the operational amplifier The non-inverting input terminal of AR2 and the non-inverting input terminal of the operational amplifier AR3 provide the base potential, and the other channel is inverting and amplified by the operational amplifier AR4. The signal output by the operational amplifier AR4 is the base potential of the inverting input terminal of the operational amplifier AR1. The amplifier AR2 and the operational amplifier AR1 form a differential circuit to stabilize the static operating point of the signal voltage. The output signal of the operational amplifier AR2 is input into the voltage-stabilizing output circuit, and the output signal of the operational amplifier AR2 is input into the non-inverting input of the operational amplifier AR3. In the terminal, the in-phase amplified signal of the op amp AR3 is the base potential of the triode Q2, and the triode Q2 is the feedback signal of the emitter, and the potential of the inverting input terminal of the op amp AR1 is adjusted to adjust the signal amplitude and feedback the stable signal. The voltage output circuit receives the output signal of the differential feedback circuit, uses the voltage regulator circuit composed of the triode Q3 and the voltage regulator D7 to stabilize the voltage, and designs the LC circuit composed of the inductance L2 and the capacitor C1 in parallel to filter and output, that is, the input electronic product control In the signal transmission channel of the signal conditioning circuit of the device;

The differential feedback circuit is divided into two ways to receive the signal output by the signal receiving circuit, and one way is input to the non-inverting input terminal of the operational amplifier AR2 and the non-inverting input terminal of the operational amplifier AR3 after being limited by the sliding rheostat RW2. At the same time, the power supply +10V is the operational amplifier The non-inverting input terminal of the device AR2 and the non-inverting input terminal of the operational amplifier AR3 provide the base potential, in which the inductance L3 plays the role of filtering, the diode D5 and the diode D6 play the role of unidirectional conduction current, and the other channel passes through the operational amplifier AR4 to reverse the phase Amplify and increase the signal power. The signal output by the operational amplifier AR4 is the base potential of the inverting input terminal of the operational amplifier AR1. The operational amplifier AR2 and the operational amplifier AR1 form a differential circuit to stabilize the static operating point of the signal voltage and increase the signal voltage. Anti-interference, the output signal of the operational amplifier AR2 is input into the voltage-stabilized output circuit, and at the same time the output signal of the operational amplifier AR2 is input into the non-inverting input terminal of the operational amplifier AR3, and the in-phase amplified signal of the operational amplifier AR3 is the base of the transistor Q2 Potential, since the signal received by the non-inverting input terminal of the op amp AR3 is the differentially processed signal of the op amp AR2 and AR1 and the signal filtered by the inductance L3, the feedback of the triode Q2 can be more accurately controlled, and the triode Q2 is the feedback signal of the emitter pole. When the signal amplitude is abnormal, the triode Q2 is turned on at this time, and the triode Q2 is the emitter feedback signal, the potential of the inverting input terminal of the operational amplifier AR1 becomes larger, that is, the potential of the output terminal of the operational amplifier AR1 decreases, and the adjustment of the operational amplifier AR1 The potential of the inverting input terminal can adjust the signal amplitude and feedback the stable signal.

Embodiment 2, on the basis of Embodiment 1, the signal receiving circuit receives the signal at the input end of the signal transmission channel in the signal conditioning circuit of the electronic product control device, the voltage regulator tube D1 plays the role of voltage stabilization, the inductor L1 filters, and the inductor One end of L1 is connected to the anodes of the diode D3 and the diode D2, the other end of the inductor L1 is connected to the signal output port and the cathode of the regulator D1, and the anode of the regulator D1 is grounded.

Embodiment 3, on the basis of Embodiment 1, the voltage stabilizing output circuit receives the output signal of the differential feedback circuit, uses the voltage stabilizing circuit composed of the triode Q3 and the voltage stabilizing tube D7 to stabilize the voltage, further stabilizes the signal, and designs the inductor L2 The LC circuit formed in parallel with the capacitor C1 is filtered and output to improve the anti-interference of the signal, that is, in the signal transmission channel of the signal conditioning circuit input to the electronic product control device, the collector of the transistor Q3 is connected to the other end of the resistor R7 and the resistor One end of R15, the other end of the resistor R15 is connected to the base of the transistor Q3 and the negative pole of the Zener tube D7, the positive pole of the Zener tube D7 is grounded, the emitter of the transistor Q3 is connected to one end of the inductor L2, and the other end of the inductor L2 is connected to the capacitor C1 One end of the resistor R16 and one end of the resistor R16, the other end of the capacitor C1 is grounded, and the other end of the resistor R16 is connected to the signal output port.

When the present invention is specifically used, the signal adjustment circuit of the electronic product control device includes a signal receiving circuit, a differential feedback circuit and a voltage stabilizing output circuit, and it is characterized in that the signal receiving circuit receives The signal at the input end of the channel, the differential feedback circuit is divided into two ways to receive the signal output by the signal receiving circuit, and one way is input to the non-inverting input terminal of the operational amplifier AR2 and the non-inverting input terminal of the operational amplifier AR3 after being limited by the sliding rheostat RW2. +10V provides the base potential for the non-inverting input terminal of the operational amplifier AR2 and the non-inverting input terminal of the operational amplifier AR3, and the other channel is amplified by the inverting phase of the operational amplifier AR4, and the output signal of the operational amplifier AR4 is the inverting input of the operational amplifier AR1 The terminal potential, the operational amplifier AR2 and the operational amplifier AR1 form a differential circuit to stabilize the static operating point of the signal voltage. In the non-inverting input terminal of the amplifier AR3, the in-phase amplified signal of the operational amplifier AR3 is the base potential of the triode Q2, and the triode Q2 is the feedback signal of the emitter pole. Adjust the potential of the inverting input terminal of the operational amplifier AR1 to adjust the signal amplitude and stabilize the feedback. The effect of the signal, the final voltage regulator output circuit receives the output signal of the differential feedback circuit, uses the voltage regulator circuit composed of the transistor Q3 and the regulator tube D7 to stabilize the voltage, and designs the LC circuit composed of the inductance L2 and the capacitor C1 in parallel to filter and output. That is, it is input into the signal transmission channel in the signal conditioning circuit of the electronic product control device;

The differential feedback circuit is divided into two ways to receive the signal output by the signal receiving circuit, and one way is input to the non-inverting input terminal of the operational amplifier AR2 and the non-inverting input terminal of the operational amplifier AR3 after being limited by the sliding rheostat RW2. At the same time, the power supply +10V is the operational amplifier The non-inverting input terminal of the device AR2 and the non-inverting input terminal of the operational amplifier AR3 provide the base potential, in which the inductance L3 plays the role of filtering, the diode D5 and the diode D6 play the role of unidirectional conduction current, and the other channel passes through the operational amplifier AR4 to reverse the phase Amplify and increase the signal power. The signal output by the operational amplifier AR4 is the base potential of the inverting input terminal of the operational amplifier AR1. The operational amplifier AR2 and the operational amplifier AR1 form a differential circuit to stabilize the static operating point of the signal voltage and increase the signal voltage. Anti-interference, the output signal of the operational amplifier AR2 is input into the voltage-stabilized output circuit, and at the same time the output signal of the operational amplifier AR2 is input into the non-inverting input terminal of the operational amplifier AR3, and the in-phase amplified signal of the operational amplifier AR3 is the base of the transistor Q2 Potential, since the signal received by the non-inverting input terminal of the op amp AR3 is the differentially processed signal of the op amp AR2 and AR1 and the signal filtered by the inductance L3, the feedback of the triode Q2 can be more accurately controlled, and the triode Q2 is the feedback signal of the emitter pole. When the signal amplitude is abnormal, the triode Q2 is turned on at this time, and the triode Q2 is the emitter feedback signal, the potential of the inverting input terminal of the operational amplifier AR1 becomes larger, that is, the potential of the output terminal of the operational amplifier AR1 decreases, and the adjustment of the operational amplifier AR1 Inverting the potential of the input terminal has the effect of adjusting the signal amplitude and feeding back a stable signal. The voltage stabilizing output circuit receives the output signal of the differential feedback circuit, and uses the voltage stabilizing circuit composed of the triode Q3 and the voltage stabilizing tube D7 to stabilize the voltage and further stabilize the signal. , and designed an LC circuit composed of an inductance L2 and a capacitor C1 in parallel to filter and output to improve the anti-interference of the signal, that is, to enter the signal transmission channel in the signal conditioning circuit of the electronic product control device.

The above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited thereto; , the extension made, the operation method and the replacement of data should all fall within the protection scope of the present invention.

Claims (3)

1. the circuit for signal conditioning of electronic product control device, including signal receiving circuit, differential feedback circuit and voltage stabilizing output Circuit, which is characterized in that signal transmission in the circuit for signal conditioning of the signal receiving circuit reception electronic product control device The signal of path input, the differential feedback circuit divide the signal that two-way receives signal receiving circuit output, all the way through sliding It is inputted in the in-phase input end and transport and placing device AR3 in-phase input ends of transport and placing device AR2 after rheostat RW2 current limlitings, while power supply+10V Base current potential is provided for the in-phase input end and transport and placing device AR3 in-phase input ends of transport and placing device AR2, another way is through transport and placing device AR4 reverse phases Amplification, the signal that transport and placing device AR4 is exported are the anti-phase input end group current potential of transport and placing device AR1, transport and placing device AR2 and transport and placing device AR1 groups It is inputted in voltage-stabilizing output circuit at the output signal of difference channel, the quiescent point of stabilization signal voltage, transport and placing device AR2, Simultaneously in the in-phase input end of the output signal input transport and placing device AR3 of transport and placing device AR2, transport and placing device AR3 is three with phase amplified signal Pole pipe Q2 base potentials, triode Q2 are transmitting extremely feedback signal, adjust transport and placing device AR1 anti-phase input terminal potentials, play tune The effect of signal amplitude, feedback stability signal is saved, last voltage-stabilizing output circuit receives differential feedback circuit output signal, with three The regulator circuit voltage stabilizing of pole pipe Q3 and voltage-stabiliser tube D7 compositions, and devise the lc circuit filter that inductance L2 and capacitance C1 are composed in parallel It exports, is that is to say in the circuit for signal conditioning of input electronic product control device in signal transmission passage after wave；

The differential feedback circuit includes transport and placing device AR4, one end of the anti-phase input terminating resistor R3 of transport and placing device AR4, resistance R3 Another terminating diode D2 cathode, one end of the homophase input terminating resistor R4 and resistance R11 of transport and placing device AR4, resistance R4 The other end ground connection, one end of the output end and resistance R10 of another termination transport and placing device AR4 of resistance R11, resistance R10's is another Terminate the emitter of the inverting input and triode Q2 of transport and placing device AR1, homophase input terminating resistor R12, the electricity of transport and placing device AR1 Hinder one end of R13, the other end ground connection of resistance R12, the other end and resistance R8, electricity of the output terminating resistor R13 of transport and placing device AR1 One end of R9 is hindered, the collector of another termination triode Q2 of resistance R9, another termination slide rheostat RW1's of resistance R8 touches Point 2, the contact 3 of slide rheostat RW1 connect the contact 1 of slide rheostat RW1, resistance R6 one end and transport and placing device AR2 reverse phase Input terminal, one end of the output end and resistance R7, resistance R14, resistance R20 of another termination transport and placing device AR2 of resistance R6, resistance The anode of another terminating diode D8 of R20, one end of the homophase input terminating resistor R5 of transport and placing device AR2 and resistance R14's is another One end, the anode of one end and diode D4 of another termination inductance L3 of resistance R5, another termination slide rheostat of inductance L3 The contact 2 of RW2, the contact 3 of slide rheostat RW2 connect the cathode of diode D3, and the contact 1 of slide rheostat RW2 connects diode The cathode of D6, one end of the positive connecting resistance R2 of diode D6, the anode and resistance R1 of another terminating diode D5 of resistance R2 One end, another termination power+10V of resistance R1, diode D5 cathode ground connection, the cathode connecting resistance R19's of diode D4 One end, the in-phase input end of the cathode and transport and placing device AR3 of another terminating diode D8 of resistance R19, the reverse phase of transport and placing device AR3 are defeated Enter one end of terminating resistor R17, resistance R18, the other end ground connection of resistance R18, transport and placing device AR3's exports terminating resistor R17's The base stage of the other end and triode Q2.

2. the circuit for signal conditioning of electronic product control device as described in claim 1, which is characterized in that the signal receives Circuit includes inductance L1, a terminating diode D3 of inductance L1, the anode of diode D2, another termination signal output of inductance L1 The cathode of port and voltage-stabiliser tube D1, the plus earth of voltage-stabiliser tube D1.

3. the circuit for signal conditioning of the electronic product control device as claimed in claim 1 or 2, which is characterized in that described Voltage-stabilizing output circuit includes triode Q3, one end of the other end and resistance R15 of the collector connecting resistance R7 of triode Q3, resistance The cathode of the base stage and voltage-stabiliser tube D7 of another termination triode Q3 of R15, the plus earth of voltage-stabiliser tube D7, the transmitting of triode Q3 Pole connects one end of inductance L2, one end of one end and resistance R16 of another termination capacitor C1 of inductance L2, another termination of capacitance C1 Ground, another termination signal output port of resistance R16.