| 摘要 |
An oscillator of frequency switching type according to the present invention can select and output any of a plurality of high frequencies, and can downsize a device. The oscillator of frequency switching type operates any of a plurality of crystal oscillators whose fundamental frequencies are different, and filters a signal output from the operating crystal oscillator with a SAW filter configured by forming a plurality of IDTs, which set passbands of different frequencies, on the same piezoelectric substrate, or with a filter arranged for each frequency. Or, a filter filtering a signal output from one crystal oscillator is selected.
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