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The reset switch synchronously controls the circuit of the mute function

A synchronous control and reset switch technology, applied in program control, computer control, general control system, etc., can solve the problems of complex circuit design, unsuitable for popularization and application, increase circuit energy consumption and circuit cost, and achieve the effect of simple circuit

Active Publication Date: 2018-07-13
JIANGSU TIANAN SMART SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A technical solution in the prior art controls the mute function, which adopts a switch mute protection unit, a reset mute unit, and an audio mute unit. It adopts a complicated circuit design, which increases the energy consumption and circuit cost of the circuit, and is not suitable for popularization and application.

Method used

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  • The reset switch synchronously controls the circuit of the mute function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 A circuit for synchronously controlling the mute function of a reset switch includes the following components: a first electrolytic capacitor EC1, a first resistor R15, a second resistor R17, a first triode Q6, a third resistor R18, a second electrolytic Capacitor EC2, fourth resistor R19, first diode D17, fifth resistor R20, second triode Q7, reset button RESET, second diode D5, capacitor C11, sixth resistor R25, seventh resistor R26 . The terminals connected with the mute circuit include: mute control terminal AUDIO_MUTE, MCU key MCU_KEY, MCU power supply terminal MCU_VCC, MCU mute terminal MCU_MUTE, power amplifier standby ST-BY.

[0023] The first transistor Q6 is an NPN transistor, and the second transistor Q7 is a PNP transistor.

[0024] The negative electrode of the first electrolytic capacitor EC1 is grounded, the positive electrode is respectively connected to the first resistor R15 , the second resistor R17 and the MCU mute terminal MCU_MUT...

Embodiment 2

[0027] On the basis of Embodiment 1, this embodiment adds a delay circuit, and the delay circuit includes a resistor and a capacitor. One end of the capacitor of the delay circuit is grounded, the other end is connected to the resistor, and one end of the resistor is connected to the delay circuit. The capacitors of the circuit are connected and provided with a first circuit inlet, and the other end is a second circuit inlet. The delay circuit is connected in parallel with the first diode D17.

[0028] The reset switch in Embodiment 1 can be replaced by a switch control circuit, which includes a circuit input terminal, a circuit output terminal, a third diode, a fourth diode, a third electrolytic capacitor, a ninth resistor and a tenth resistor . One end of the ninth resistor is grounded, the other end is connected to the cathode of the third diode and the circuit input terminal, the anode of the third diode is connected to the tenth resistor and the cathode of the fourth dio...

Embodiment 3

[0030] In this embodiment, on the basis of Embodiment 1, a vibrating circuit is added, and the vibrating circuit includes a circuit output terminal, a circuit access terminal, an eighth resistor, a third triode and a miniature vibrator. One end of the eighth resistor is connected to the output end of the circuit, the other end is connected to the base electrode of the third triode, the collector of the third triode is connected to the micro vibrator, the emitter of the third triode is grounded, and the micro vibrator The other end is connected to the circuit access end. As for the mechanical part, the miniature vibrator is installed inside the reset button.

[0031]The vibration circuit is connected in parallel with the circuit composed of the fourth resistor R19, the first diode D17 and the second triode through the circuit output terminal and the circuit access terminal. The purpose of the vibration circuit setting is that when the reset button is pressed, the instantaneous...

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Abstract

The invention discloses a reset switch mute function synchronous control circuit, which mainly comprises electrolytic capacitors, resistors, triodes, diodes, a capacitor and a reset key. When the reset is pressed down, one path of the circuit is connected to the ground through one diode and one triode, and outputs a high-level signal to a mute control end; and meanwhile, the other path of the circuit is grounded through one diode and realizes a function of mute power amplification. The circuit design of the reset switch mute function synchronous control circuit is completely realized through hardware, thereby eliminating horn noise caused when pressing the reset switch to power off; and the circuit is simple, reliable and practical, and has a vehicle-mounted multimedia aspect application prospect.

Description

technical field [0001] The invention relates to an electronic circuit, in particular to a circuit for synchronously controlling the mute function of a reset switch. Background technique [0002] As an important part of electronic products, the mute circuit can eliminate the "popping" sound generated by the overshoot voltage during the switching and resetting of TVs, car multimedia, etc., especially when the power supply voltage changes , The transient impact will make the sound processing module or power amplifier circuit make a "popping" sound, which will make the user experience worse and have a certain impact on the quality of the device. Therefore, the setting of the mute circuit is very necessary. [0003] A solution in the prior art uses a plurality of triodes to form a switch mute circuit, cooperates with the I / O port of the MCU to control the power amplifier circuit, and controls the turn-on and cut-off of multiple triodes by the high and low voltage of the mute sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/24131
Inventor 林育青徐淑萍
Owner JIANGSU TIANAN SMART SCI & TECH
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