Charge indicator of battery
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United States of America Patent
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Mar 29, 1994
Issued Date -
N/A
app pub date -
Apr 16, 1993
filing date -
Mar 29, 1991
priority date (Note) -
Expired
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Abstract
A charge indicator for a battery functioning to accurately indicate the residual capacity corresponding to changes of the discharge rate of the battery uses a timer output voltage of a timer circuit and is changed corresponding to the discharge rate of the battery by a pulse-period-setting part. The timer output voltage and the voltage corresponding to the residual capacity are differentially amplified in the corresponding voltage of the discharge rate-varying part to change the corresponding voltage of the discharge rate. When the sensed voltage exceeds a predetermined value, the reset part resets the voltage to a corresponding voltage of the fully charged battery.
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