Power supply circuit and portable device

Details Power supply circuit and portable device Power supply circuit and portable device

2011-01-04

2011-01-04

Nguyen, Matthew V (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C363S059000

Reexamination Certificate

active

07864553

ABSTRACT:
In a power supply circuit, a first switching transistor and a second switching transistor are serially connected between another-side terminal GND and a one-side terminal VCCof an input power supply, and a third switching transistor and a fourth switching transistor are serially connected between the one-side terminal VCCof the input power supply and a boosted output terminal OUT. A shift capacitor is provided between a connection point of the first and second switching transistors and a connection point of the third and fourth switching transistors, and a holding capacitor is connected to the boosted output terminal OUT. A back gate switching circuit for switching a voltage to be applied to the back gate is provided for the third switching transistor.

REFERENCES:
patent: 4460952 (1984-07-01), Risinger
patent: 6249446 (2001-06-01), Shearon et al.
patent: 6834001 (2004-12-01), Myono
patent: 7099166 (2006-08-01), Kim
patent: 7446521 (2008-11-01), Taurand
patent: 2005-72353 (2005-03-01), None
Patent Abstracts of Japan for Japanese Publication No. 2005-072353, Publication date Mar. 17, 2005 (1 page).

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