| 摘要 |
PROBLEM TO BE SOLVED: To provide a mute circuit capable of preventing popping sound in a silent state when the power is supplied, and a digital audio amplifier circuit. SOLUTION: This mute circuit of the digital audio amplifier circuit is provided with a PWM driving means which performs pulse driving of a 1st transistor of a push operation and a 2nd transistor of a pull operation, a 1st serial circuit consisting of a 1st switch and a 1st resistor inserted between a power supply line and the output terminal of an output circuit, a 2nd serial circuit consisting of a 2nd switch and a 2nd resistor inserted between the output terminal and a reference potential line, and a mute signal generation circuit generating a signal turning on the 1st and 2nd switches for a prescribed period after the power is supplied.
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