| 摘要 |
PROBLEM TO BE SOLVED: To obtain satisfactory phase noise characteristics. SOLUTION: At the time of performing oscillation with high frequencies, MOSFETs 11 and 13 are connected in parallel with a tank circuit 3. When performing oscillation with low frequencies, control elements 15 and 17 are turned on, and MOSFETs 11, 13, 19 and 21 are connected in parallel with the tank circuit 3.
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