ELECTRONIC TIMEPIECE

摘要

This invention is directed to obtain a compact, low-power electronic timepiece which supplies a stepper motor with effective power depending on changes such as an increase of load of a step motor with time and variations of quality of components to improve accuracy of detection of revolution of a rotor. To amplify the voltage induced by rotation of the rotor that occurs after cut-off of a main driving pulse, a detection auxiliary pulse is supplied to the step motor so as to improve detection accuracy of revolution and to actuate the step motor with minimum necessary effective power.