| 摘要 |
A high-frequency Colpitts circuit having a feedback transistor Q2 in addition to an oscillation transistor Q1 is provided, wherein a collector of the transistor Q1 is connected to a base of the transistor Q2, a supply voltage is applied to a collector of the transistor Q2 through a resistance R5 and is connected to an output terminal, the collector is connected to a base of the transistor Q1 through a feedback resistance Rf, a crystal oscillator and one end of capacitors C1 and C2 connected in series are connected to the base, the other end of the capacitors is grounded, and a point between the capacitors C1 and C2 is connected to an emitter of the transistor Q1 and is grounded through a resistance R4. |
