| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain miniaturization and current consumption reduction by unnecessitating a dedicated crystal vibrator, ceramic resonator, and CR time constant circuit or the like for obtaining a frequency signal required for the frequency synthesizer of a radio receiver or for the stereo demodulation of an FM signal in a telephone system with a function of an FM radio receiver added. <P>SOLUTION: The clock frequency of a clock generator for a main body part of a telephone set is set to a frequency which is the integer multiple of a reference frequency for the FM radio receiver and is the integer multiple of a frequency for demodulation. Then, the clock of the clock generator for the main body part of the telephone set is shared as a system clock for the FM radio receiver part. <P>COPYRIGHT: (C)2003,JPO |
