Crystal-oscillator circuit for preventing stopping of oscillation

摘要

A crystal-oscillator circuit includes an oscillation transistor (2) having the collector or the base thereof at a ground potential at a high frequency. A first feedback capacitor (5) is connected at a high frequency between the base and the emitter of the oscillation transistor. A second feedback capacitor (6) is connected at a high frequency between the emitter and the collector. A quartz crystal resonator (3) and a capacitor (4) are connected in series at a high frequency between the base and the collector. The capacitor is disposed at the ground potential side. An oscillation signal is extracted from a node between the quartz crystal resonator and the capacitor. <IMAGE>