| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce a carrier component caused by spectrum spreading even if a carrier frequency is low, and to prevent an audio signal from being deteriorated even if this clock is applied to a PWM system digital amplifier. <P>SOLUTION: An output frequency of a clock signal is divided by a frequency divider, a relaxation oscillation type waveform generator is synchronously pulled in by a frequency dividing output, and a frequency of a clock signal generator is modulated by an output of the relaxation oscillation type waveform generator. Thus, the clock signal generator can be synchronized with a modulation signal, and a carrier level of the clock generator can be reduced. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
