Voltage control system for electronic timepiece
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United States of America Patent
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-
May 4, 1982
Grant Date -
N/A
app pub date -
Aug 8, 1980
filing date -
Aug 14, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an electronic timepiece powered by a lithium battery, a voltage control system is provided whereby a supply voltage of approximately one half of the battery voltage is supplied to certain portions of the timepiece circuit under normal operating conditions, but whereby cessation of operation by the timebase oscillator circuit of the timepiece due to some abnormal state such as excessively low ambient operating temperature is automatically detected and a changeover is made to supply of the full battery voltage to all of the timepiece circuitry. Upon recovery of operation of the timebase oscillator circuit, changeover to the low voltage supply state is performed.
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