| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crystal oscillation circuit which outputs a plurality of frequency signals and is reduced in power consumption and whose structure is made simple and compact. <P>SOLUTION: The crystal oscillation circuit outputs a desired frequency signal by frequency-dividing an output from a voltage-controlled crystal oscillator (VCXO) 2 by a frequency divider 3 according to a frequency division ratio, synthesizing the frequency-divided signal with the signal output from the (VCXO) 2 by a synthesizer 4, outputting the resulting signal to a plurality of BPFs 5 whose pass bands are predetermined according to the frequency division ratio, so that only a corresponding BPF passes the signal of the specified frequency band, and then performing phase control by a PLL 6. <P>COPYRIGHT: (C)2010,JPO&INPIT |
