CN-224233653-U - Amplifier circuit for multipath voltage control

Abstract

The application relates to the technical field of voltage control and discloses an amplifier circuit for multipath voltage control, which comprises chips U20, U25B, U, A, U, B, U A and U23B, adjustable potentiometers R130 and R40, resistors R240, R257, R258, R239, R241, R256, R159, R243, R242, R255, R230, R229, R146, R279, R277, R276, R275, R278, R66, R55, R60, R382 and R273, polar capacitors C153, C152, C154, C157, C158, C159, C155, C156, C162, C195, C196 and C65, capacitors C168, C167, C169, C170, C180, C151, C150, C250, C106, C101 and C382, field tube Q29, diodes D46 and D47, green light LED 5 and socket J7. The method and the device realize stable signal amplification under the accurate control of multiple paths of voltages, meet the high requirements of application scenes such as an internal communication system on signal processing, and improve the circuit performance.

Inventors

• Ye Pingting

Assignees

• 广州华燎电气科技有限公司

Dates

Publication Date

20260512

Application Date

20250521

Claims (1)

1. 1. An amplifier circuit for multipath voltage control, comprising a chip U20, a chip U25B, a chip U21A, a chip U21B, a chip U23A, a chip U23B, an adjustable potentiometer R130, an adjustable potentiometer R40, a resistor R240, a resistor R257, a resistor R258, a resistor R239, a resistor R241, a resistor R256, a resistor R159, a resistor R243, a resistor R242, a resistor R255, a resistor R230, a resistor R229, a resistor R146, a resistor R279, a resistor R277, a resistor R276, a resistor R275, a resistor R278, a resistor R66, a resistor R55, a resistor R60, a resistor R382, a resistor R273, a resistor C153, a resistor C152, a resistor C154, a resistor C157, a resistor C158, a resistor C159, a resistor C155, a resistor C156, a resistor C162, a resistor C195, a resistor C196, a resistor C65, a resistor C168, a resistor C167, a resistor C170, a capacitor C170, a resistor C180, a resistor C150, a resistor C151, a resistor C60, a resistor D101, a diode D, and the like; The pin 2 of the adjustable potentiometer R130 is connected with the channel ESWD2, the pin 1 of the adjustable potentiometer R130 is connected with the GNDA, the pin 3 of the adjustable potentiometer R130 is connected with the positive electrode of the polar capacitor C153, the negative electrode of the polar capacitor C152 is connected with the pin 1 of the resistor R240, the pin 2 of the resistor R240 and the pin 2 of the resistor R257 are both connected with the pin 7 of the chip U20, the pin 1 of the resistor R257 is connected with the pin 2 of the capacitor C168, the pin 1 of the capacitor C168 and the pin 1 of the capacitor C167 are both connected with the GNDA, the pin 2 of the capacitor C167 is connected with the pin 1 of the resistor R258, and the pin 2 of the resistor R258 is connected with the pin 2 of the chip U20; the positive electrode of the polar capacitor C152 is connected with the channel PGM, the negative electrode of the polar capacitor C152 is connected with the 1 pin of the resistor R23, and the 2 pin of the resistor R23 is connected with the 2 pin of the chip U20; the positive pole of the polar capacitor C152 is also connected with the positive pole of the polar capacitor C154, the negative pole of the polar capacitor C154 is connected with the 1 pin of the resistor R241, the 2 pin of the resistor R241 is connected with the 10 pin of the chip U20, the 2 pin of the resistor R241 is also connected with the 1 pin of the resistor R256, the 2 pin of the resistor R256 is connected with the 1 pin of the capacitor C169, the 2 pin of the capacitor C169 is connected with the GNDA, the channel J1A 5, the positive pole of the polar capacitor C157 and the positive pole of the polar capacitor C158 are connected with the 6 pin of the chip U20, the negative pole of the polar capacitor C157 and the negative pole of the polar capacitor C158 are connected with the 14 pin of the chip U20, the 1 pin of the resistor R159, the 1 pin of the capacitor C101 and the 6 pin of the chip U25B are connected with the channel CSWD1, the 5 pin of the chip U25B is connected with the GNDA, the 2 pin of the resistor R159, the 2 pin of the capacitor C101, the positive pole of the polar capacitor C157, the positive pole of the polar capacitor C155 and the negative pole of the polar capacitor C158 are connected with the negative pole of the resistor C158, the positive pole of the polar capacitor C155 and the negative pole of the resistor C7 of the resistor C21 is connected with the negative pole of the chip 21, and the negative pole of the resistor R21 is connected with the pin 21 of the chip C20, and the negative pole of the resistor R21 is connected with the pin 21, the pin 2 of the resistor R242, the pin 1 of the resistor R255 are connected with the pin 15 of the chip U20, the pin 2 of the resistor R255 is connected with the pin 1 of the capacitor C170, and the pin 2 of the capacitor C170 is connected with the GNDA, the pin 3 and the pin 11 of the chip U20, the positive electrode of the polarity capacitor C156, the positive electrode of the polarity capacitor C162 and the pin 3 of the adjustable potentiometer R40 are connected, the negative electrode of the polarity capacitor C156 is grounded, and the negative electrode of the polarity capacitor C162 is grounded; Wherein, the 9 pin of the chip U20 is grounded; the 16 pin of the chip U20 is connected with VCC; the 1 pin of the chip U20 is connected with the 1 pin of the capacitor C180, and the 2 pin of the capacitor C180 is grounded; the LED is characterized in that pins 8 of a chip U20 are connected with GNDA, pins 12 and 13 of the chip U20, pin 1 of a resistor R230, pin 1 of a capacitor C151 and pin 6 of a chip U21B are connected, pin 2 of a resistor R230, pin 2 of a capacitor C151, pin 7 of a chip U21B and a channel ASWS3 are connected, pins 4 and 5 of the chip U20, pin 1 of a resistor R229, pin 1 of a capacitor C150 and pin 2 of a chip U21A are connected with GNDA, pin 3 of a chip U21A is connected with GNDA, pin 4 of a resistor U21A is connected with VCC, pin 8 of a chip U21A is connected with VCC, pin 2 of a resistor R229, pin 2 of a capacitor C150, pin 1 of a chip U21A and pin 1 of a capacitor C250 are connected with VCC 146, pin 2 of a capacitor C250 is connected with R146, pin 2 of a resistor R146, pin 2 of a field Q29, pin 1 of a capacitor C106 and pin 1 of a resistor U23A are connected with R23A 2 of a resistor C23, pin 278 of a resistor C23, and pin 25 are connected with P-C23, R46 of a resistor C2 of a resistor C23 is connected with P-C46, and P-LED is connected with P-P LED, LED is connected with P-P LED, P-P LED is connected with P-LED is connected with P-P LED is connected with P-the, the 2 feet of the resistor R66 are connected with the 1 foot of the chip U23A, the 2 feet of the capacitor C106, the 5 feet of the chip U23B, the 1 foot of the resistor R55 and the channel S3_B are connected, the 6 feet of the chip U23B, the 1 foot of the resistor R60 and the 7 feet of the chip U23B are connected, the 2 feet of the resistor R55, the 2 feet of the resistor R66 and the positive electrode of the polar capacitor C65 are connected, the negative electrode of the polar capacitor C65, the 1 foot of the resistor R382 and the 1 foot of the socket J7 are connected, the 2 feet of the resistor R382 are grounded, the 2 feet of the socket J7 are suspended, and the 3 feet of the socket J7 are grounded.

Description

Amplifier circuit for multipath voltage control Technical Field The application relates to the technical field of voltage control, in particular to an amplifier circuit for multipath voltage control. Background In modern electronic devices, the multi-channel voltage controlled amplifier circuit is widely applied, and plays a key role in the fields of internal communication systems and the like. However, the existing multi-path voltage controlled amplifier circuit has a plurality of problems. On the one hand, the signal processing accuracy is low. When processing multichannel input signals, it is difficult to guarantee to carry out accurate amplification and control to different channel signals, leads to the condition such as output signal appears distortion, deviation easily, seriously influences the overall performance of system. For example, in an audio internal communication system, problems such as poor sound quality and unstable volume are caused. On the other hand, the stability of the circuit is insufficient. The existing circuit is greatly influenced by external interference factors, and voltage control is possibly fluctuated due to power supply fluctuation, electromagnetic interference and the like, so that normal transmission and processing of signals are influenced. In addition, the existing circuit is low in integration level and scattered in element layout, so that the size and cost of the circuit are increased, and the reliability and anti-interference capability of the system are reduced. Therefore, there is a need for a multi-path voltage controlled amplifier circuit that can improve signal processing accuracy, and enhance circuit stability and integration. Disclosure of utility model The present application is directed to an amplifier circuit for multi-path voltage control, which solves the technical problems set forth in the background art. In order to achieve the aim, the application discloses a technical scheme that an amplifier circuit for multipath voltage control comprises a chip U20, a chip U25B, a chip U21A, a chip U21B, a chip U23A, a chip U23B, an adjustable potentiometer R130, an adjustable potentiometer R40, a resistor R240, a resistor R257, a resistor R258, a resistor R239, a resistor R241, a resistor R256, a resistor R159, a resistor R243, a resistor R242, a resistor R255, a resistor R230, a resistor R229, a resistor R146, a resistor R279, a resistor R277, a resistor R276, a resistor R275, a resistor R278, a resistor R66, a resistor R55, a resistor R60, a resistor R382, a resistor R273, a polar capacitor C153, a polar capacitor C152, a polar capacitor C154, a polar capacitor C157, a polar capacitor C158, a polar capacitor C159, a polar capacitor C155, a polar capacitor C162, a polar capacitor C195, a polar capacitor C196, a polar capacitor C65, a capacitor C168, a capacitor C170, a C180, a C170, a C150, a capacitor C150, a diode D, a LED capacitor C101, a diode D capacitor C150, a diode D capacitor and the like; The pin 2 of the adjustable potentiometer R130 is connected with the channel ESWD2, the pin 1 of the adjustable potentiometer R130 is connected with the GNDA, the pin 3 of the adjustable potentiometer R130 is connected with the positive electrode of the polar capacitor C153, the negative electrode of the polar capacitor C152 is connected with the pin 1 of the resistor R240, the pin 2 of the resistor R240 and the pin 2 of the resistor R257 are both connected with the pin 7 of the chip U20, the pin 1 of the resistor R257 is connected with the pin 2 of the capacitor C168, the pin 1 of the capacitor C168 and the pin 1 of the capacitor C167 are both connected with the GNDA, the pin 2 of the capacitor C167 is connected with the pin 1 of the resistor R258, and the pin 2 of the resistor R258 is connected with the pin 2 of the chip U20; the positive electrode of the polar capacitor C152 is connected with the channel PGM, the negative electrode of the polar capacitor C152 is connected with the 1 pin of the resistor R23, and the 2 pin of the resistor R23 is connected with the 2 pin of the chip U20; the positive pole of the polar capacitor C152 is also connected with the positive pole of the polar capacitor C154, the negative pole of the polar capacitor C154 is connected with the 1 pin of the resistor R241, the 2 pin of the resistor R241 is connected with the 10 pin of the chip U20, the 2 pin of the resistor R241 is also connected with the 1 pin of the resistor R256, the 2 pin of the resistor R256 is connected with the 1 pin of the capacitor C169, the 2 pin of the capacitor C169 is connected with the GNDA, the channel J1A 5, the positive pole of the polar capacitor C157 and the positive pole of the polar capacitor C158 are connected with the 6 pin of the chip U20, the negative pole of the polar capacitor C157 and the negative pole of the polar capacitor C158 are connected with the 14 pin of the chip U20, the 1 pin of the resistor R159, the 1 pin of the capacitor C101 and the 6 pin