| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the versatility of an audio signal processing circuit. <P>SOLUTION: A gain controller 12 controls the amplitude of an audio signal. A PWM converter 18 PWM-converts the amplitude-controlled signal. The gain controller 12 limits the amplitude of the audio signal in response to a limiter control signal, but as to an amplitude-controlled audio signal having a maximum amplitude, the PWM conversion circuit 18 applies amplitude limitations based on a limited modulation degree of PWM conversion despite the limiter control signal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
