Patent ID: 8335322

Claim:
An electronic device, comprising: an amplifier for amplifying audio signals and generating amplified audio signals accordingly, the amplifier comprising an output port for outputting the amplified audio signals; an output unit for emitting sounds corresponding to the amplified audio signals; a processing unit for generating a mute control signal; and a mute control circuit comprising: a main circuit for responding to the mute control signal, and driving the amplifier to change between a mute state and a play state accordingly; and an auxiliary circuit for enabling the output port of the amplifier to be electrically grounded at the moment of supplying power to the electronic device; wherein the amplifier further comprises an input port electrically connected to the processing unit through the main circuit, one end of the auxiliary circuit is electrically connected to the main circuit, the other end of the auxiliary circuit is electrically connected to the output port, the main circuit comprises: a power source; a first resistor, one end of the first resistor electrically connected to the processing unit, the other end of the first resistor electrically connected to the power source; a second resistor; a first transistor, a base of the first transistor electrically connected to the processing unit through the second resistor, an emitter of the first transistor electrically connected to the power source, a collector of the first transistor electrically connected to the input port of the amplifier; and a third resistor, one end of the third resistor electrically grounded, the other end of the third resistor electrically connected to the input port.