Electrical transmission or interconnection systems – Capacitor
Patent
1997-11-21
2000-01-18
Gaffin, Jeffrey
Electrical transmission or interconnection systems
Capacitor
307125, H02M 306
Patent
active
060160187
ABSTRACT:
An battery-driven electronic apparatus incorporating battery has a source battery, a driven circuit driven by the battery, a pair of external terminals connected to the both ends of the source battery and a capacitor provided between the source battery and the external terminals. A circuit for identifying voltage of a battery having a pair of checking terminals, a resistor, a transistor, a peak hold circuit, a multiplexor, a temperature measuring circuit, an A/D converter and an identification control circuit including an arithmetic circuit and an identification circuit is employed to identify voltage of the source battery of the electronic apparatus incorporating battery by coupling the pair of the checking terminals with the pair of the external terminals of the electronic apparatus incorporating battery, measuring voltages of the source battery repeatedly and calculating voltage differences by the arithmetic circuit for identifying whether the battery is usable or not by comparing voltage differences with predetermined values in the identification circuit without removing the source battery with minimal power consumption.
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Hasegawa Kazuo
Takai Daisuke
Alps Electric Co. ,Ltd.
Gaffin Jeffrey
Zura Peter
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