Circuit and method for detecting absent battery condition in...

Details Circuit and method for detecting absent battery condition in... Circuit and method for detecting absent battery condition in...

2008-04-08

2010-12-07

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Means to identify cell or battery type

C320S163000

Reexamination Certificate

active

07847516

ABSTRACT:
A circuit and method for detecting absent battery condition in a linear charger apply a detecting signal onto an output terminal of the charger and monitor the output terminal to receive a detected signal. The capacitance at the output terminal is significantly different between the presence and absence of a battery connected to the output terminal, and it is thus available to determine from the detected signal, if no battery is connected to the output terminal.

REFERENCES:
patent: 6240854 (2001-06-01), Heil
patent: 6340876 (2002-01-01), Saint-Pierre
patent: 7479765 (2009-01-01), Kamatani
patent: 7589533 (2009-09-01), Houldsworth
patent: 2007/0052422 (2007-03-01), Houldsworth

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