Charging apparatus

Details Charging apparatus Charging apparatus

1998-02-19

1999-12-21

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With peak detection of current or voltage

320164, H02J 704

Patent

active

060053712

ABSTRACT:
The invention provides a charging apparatus capable of charging a secondary battery regardless of a drive state of a set circuit such as a video camera and a personal computer, and having a simple circuit configuration which can be realized at low production costs. A first resistor Ro is provided between a power source and the set circuit 1 and a secondary battery 2. A current flowing to the first resistor Ro is detected by an amplifier A2. This detection result is used to control a total current Io flowing to a set main body 3 including the set circuit 1 and the secondary battery 2 as a unitary block. Simultaneously with this, a current flowing to the second resistor Rb is detected by an amplifier A3 and this detection result is used to control a charge current Ib flowing to the secondary battery 2.

REFERENCES:
patent: 5200690 (1993-04-01), Uchida
patent: 5465039 (1995-11-01), Narita et al.

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