Protection circuit with minimized voltage reference...

Details Protection circuit with minimized voltage reference... Protection circuit with minimized voltage reference...

2007-06-13

2009-08-04

Ullah, Akm E (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage amplitude

C361S086000, C320S163000

Reexamination Certificate

active

07570026

ABSTRACT:
A protection circuit comprising: a second circuit to be connected to a first circuit, the first circuit including: a first reference voltage generating circuit configured to generate a first reference voltage; a first comparing voltage generating circuit configured to generate a first comparing voltage; a first comparator configured to output a first comparing output voltage; and a first control circuit, the second circuit including: a second comparing voltage generating circuit configured to be input with the first reference voltage and to generate a second comparing voltage to be compared with a battery voltage based on the first reference voltage; a second comparator configured to output a second comparing output voltage corresponding to relation in magnitude between the second comparing voltage and the battery voltage; and a second control circuit configured to control the supply of the charging voltage to the secondary battery corresponding to the second comparing output voltage.

REFERENCES:
patent: 5631537 (1997-05-01), Armstrong
patent: 6340880 (2002-01-01), Higashijima et al.
patent: 2001-112182 (2001-04-01), None
patent: 2002-315215 (2002-10-01), None

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