Selector circuit

Details Selector circuit Selector circuit

2008-10-23

2011-10-25

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Plural charging sources

C320S114000, C307S043000

Reexamination Certificate

active

08044639

ABSTRACT:
A selector circuit outputs one of a first input voltage or a second input voltage via an output terminal. A first transistor and a second transistor are provided in series between a first input terminal and the output terminal. A third transistor and a fourth transistor are provided in series between a second input terminal and the output terminal. A control unit controls the ON/OFF operations of the first transistor through the fourth transistor. The back gates of the first transistor and the second transistor are connected such that at least one body diode of the first transistor M1and at least one body diode of the second transistor are arranged in opposing directions. The back gates of the third transistor and the fourth transistor are connected in the same way.

REFERENCES:
patent: 5557188 (1996-09-01), Piercey
patent: 5598041 (1997-01-01), Willis
patent: 5784626 (1998-07-01), Odaohara
patent: 6744151 (2004-06-01), Jackson et al.
patent: 6853098 (2005-02-01), Jackson et al.
patent: 7528582 (2009-05-01), Ferguson
patent: 7893560 (2011-02-01), Carter
patent: 9-284994 (1997-10-01), None
patent: 2002-218645 (2002-08-01), None

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