| 摘要 |
In the case of a tuning circuit for a YIG oscillator, wherein the output frequency of the YIG oscillator which is reduced by a frequency divider or mixer is compared in a phase detector with a lower reference frequency and via a loop filter the output voltage of the phase detector feeds the air-cored coil of the YIG oscillator serving for fine tuning, the main coil of the YIG oscillator is also fed by the output voltage of the phase detector.
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