Battery voltage detecting circuit

Details Battery voltage detecting circuit Battery voltage detecting circuit

2008-09-02

2010-02-16

Tso, Edward (Department: 2858)

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

C320S116000, C324S433000, C702S064000

Reexamination Certificate

active

07663375

ABSTRACT:
A battery voltage detecting circuit includes: a first capacitor having one end connected to one input terminal of an operational amplifier; a second capacitor having one end connected to an output terminal of the operational amplifier and the other end connected to the one input terminal of the operational amplifier; a third capacitor having one end connected to the other input terminal of the operational amplifier; a fourth capacitor having one end applied with a reference voltage and the other end connected to the other input terminal of the operational amplifier; and a switching circuit configured to electrically connect the one input terminal of the operational amplifier to the one end of the first capacitor after the transient current has stopped flowing.

REFERENCES:
patent: 6462550 (2002-10-01), Yudahira
patent: 6803766 (2004-10-01), Kobayashi et al.
patent: 6965258 (2005-11-01), Bogner
patent: 7078908 (2006-07-01), Fujita et al.
patent: 2002-243771 (2002-08-01), None

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