Patent ID: 6636459
Filing Date: 2003-10-21
Classification: G04C,G04G

Abstract:
An electronic timepiece comprising:an electric power generator for converting external energy into electric energy; a storage means for storing the electric energy generated by the electric power generator; a timing means for performing a time-keeping operation by use of the electric energy supplied from the storage means or the electric power generator; a charge/discharge control means for executing transfer or shutoff of the electric energy among the electric power generator, the storage means, and the timing means, wherein a timing stoppage detection means for detecting stoppage of the time-keeping operation in the timing means is included, and the charge/discharge control means comprises a discharge switch formed of a field effect transistor whose source terminal is connected to the storage means and whose drain terminal is connected to the timing means, and a means for equalizing a gate potential of the discharge switch to a source potential thereof when the stoppage of the time-keeping operation is detected by the timing stoppage detection means.