| 摘要 |
PURPOSE: An audio signal amplification control circuit is provided to improve the reliability by amplifying selectively an inputted audio signal to prevent the distortion of sound. CONSTITUTION: An audio signal amplification control circuit includes a signal decision portion(110), an audio amplification process portion(120). The signal decision portion compares an inputted audio signal with a reference voltage signal. The audio amplification process portion amplifies the inputted audio signal if an output of the inputted audio signal is less than the output of the reference voltage signal or outputs the inputted audio signal if the output of the inputted audio signal is more than the output of the reference voltage signal. The audio amplification process portion includes an amplification portion(121) for amplifying the inputted audio signal and a switching portion(122) for outputting one of input terminals according to a result of the signal decision portion.
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