| 摘要 |
In a high-frequency oscillator, a first resonance circuit and a second resonance circuit are respectively connected to a first amplifier circuit and a second amplifier circuit. A selection circuit includes a first switch circuit and a second switch circuit which selectively operate one of the first amplifier circuit and the second amplifier circuit. A grounded capacitor is connected to output sides of the first amplifier circuit and the second amplifier circuit. The grounded capacitor is commonly used by both the first amplifier circuit and the second amplifier circuit. An auxiliary grounded capacitor is connected between the first switch circuit and the first amplifier circuit. Accordingly, the grounded capacitor and the auxiliary grounded capacitor are connected to each other in parallel only when the first amplifier circuit is activated. |
