Sound box turn-on and turn-off impact sound prevention and output short circuit protection circuit

Abstract

The invention relates to the field of a sound box and particularly relates to a sound box turn-on and turn-off impact sound prevention and output short circuit protection circuit. The circuit comprises a voltage stabilizing circuit, a time delay circuit, an electronic switch, a silence circuit, a short circuit detection circuit, a turn-off discharge circuit and a negative voltage circuit. The voltage stabilizing circuit is composed of a diode N1, a diode N2, a diode N3, a resistor R1, a resistor R2, a resistor R3 and a capacitor C1 and supplies a stable voltage for the circuit. The time delaycircuit is composed of a resistor R4, a resistor R5, a resistor R6, a capacitor C2, a capacitor C3, a diode N4 and a triode T2 and delays turn-on time. The circuit has the advantages that a relay employed by an ordinary sound box is replaced by an electronic circuit; the electronic circuit has an impact sound prevention function and a short circuit protection function; a size of a circuit board isreduced; the energy consumption is reduced; the circuit is relatively environment friendly; the sound transmission process loss is relatively low; and the sound restoration degree is relatively good.

Description

technical field [0001] The invention relates to the field of sound boxes, in particular to an anti-impact sound and output short-circuit protection circuit of an audio switch machine. Background technique [0002] At present, the existing speaker products on the market often have a "bang bang" impact sound when they are turned on or off during use. On the one hand, it leads to a very bad user experience, and on the other hand, it will cause damage to the hardware of the speaker. [0003] At present, some domestic technical solutions have been proposed to solve the above problems, such as the utility model patent 201420530974.6, a speaker switch machine anti-shock circuit, the utility model patent discloses a speaker switch machine anti-shock circuit, which includes a sequential circuit Connected power supply input terminal, charging resistor, Zener diode, master control switch triode and power supply voltage terminal for power supply to the speaker. This circuit also includ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is that in the prior art, during the use of the sound box, there will often be a "bang bang" impact sound when it is turned on or off. Impact, on the one hand, it leads to a very bad user experience, on the other hand, it will cause damage to the hardware of the speaker

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