High-frequency oscillator of frequency switching type and high-frequency oscillation method
AssigneeNihon Dempa Kogyo Co., Ltd.
InventorTakeo Oita
Life of this patent
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Abstract
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.
Claims14
A high-frequency oscillator of a frequency switching type, comprising:
- a plurality of crystal oscillation units whose fundamental frequencies of oscillation outputs are different;
- a power switching unit operating one of the plurality of crystal oscillation units;
- and
- a surface acoustic wave filter unit, which is configured by forming a plurality of interdigital transducers setting passbands of different frequencies on a same piezoelectric substrate, and the oscillation output of said crystal oscillation unit operated by said power switching unit is input to.
A high-frequency oscillator of a frequency switching type, comprising:
- a plurality of crystal oscillation units whose fundamental frequencies of oscillation outputs are different;
- a plurality of filter units which are respectively arranged for said plurality of crystal oscillation units, and whose frequency passbands are different;
- and
- an output frequency selection unit selecting a frequency of a high-frequency output, which is output from the high-frequency oscillator.
A high-frequency oscillator of a frequency switching type, comprising:
- a crystal oscillation unit distorting and outputting an oscillation output;
- a plurality of filter units whose frequency passbands are respectively different;
- and
- an input selection unit selecting one of said plurality of filter units, and inputting the oscillation output.
A high-frequency oscillator of a frequency switching type, comprising:
- a plurality of crystal oscillation means whose fundamental frequencies of oscillation outputs are different;
- power line means for operating one of said plurality of crystal oscillation means;
- and
- surface acoustic wave filter means, which is configured by forming a plurality of interdigital transducers setting passbands of different frequencies on a same piezoelectric substrate, and the oscillation output of said crystal oscillation means operated by said power line means is input to.
A high-frequency oscillator of a frequency switching type, comprising:
- a plurality of crystal oscillation means whose fundamental frequencies of oscillation outputs are different;
- a plurality of filter means which are respectively arranged for said plurality of crystal oscillation means, and whose frequency passbands are different;
- and
- output frequency selection means for selecting and outputting a frequency of a high-frequency output, which is output from the high-frequency oscillator.
A high-frequency oscillator of a frequency switching type, comprising:
- crystal oscillation means for distorting and outputting an oscillation output;
- a plurality of filter means whose frequency passbands are respectively different;
- and
- input selection means for selecting one of said plurality of filter means, and for inputting the oscillation output.
A high-frequency oscillation method, comprising:
- selecting one of oscillation outputs of a plurality of crystal oscillation units whose fundamental frequencies of the oscillation outputs are different;
- and
- inputting the selected oscillation output to a filter.
A high-frequency oscillation method, comprising:
- distorting and outputting an oscillation output;
- and
- selecting one of a plurality of filter units whose frequency passbands are respectively different, and inputting the oscillation output.
Dependencies are inferred from the claim text.