Electronic timepiece having a stepping motor and driving circuit compensated for power source variations
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 21, 1984
Grant Date -
N/A
app pub date -
Jul 10, 1980
filing date -
Sep 18, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic timepiece comprising a power source, an electronic circuit, a stepping motor, and a detecting device for detecting a rotor movement after the stepping motor is driven. The electronic circuit includes a power source voltage detecting circuit and driving power controlling device which intermits driving pulses of the stepping motor according to an output of the voltage detecting circuit so that the driving force is substantially constant and the power consumption is decreased.
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Family
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