ELECTRONIC TIMEPIECE

摘要

An electronic timepiece having a reference oscillator and a vibrating motor having resonance frequency driven at a frequency synchronized by said resonance frequency, the resonance frequency of said vibrating motor being continuously adjusted by means of a variable condenser electromechancially coupled therewith such that the oscillation of the vibrating motor remains in phase with the reference frequency. The electric energy required for driving the vibrating motor is in this way kept at a minimum. Control of said variable condenser is effected electronically by means of a phase detector controlled by the reference oscillation and the oscillation of the vibrating motor.