Charge pump circuit

Details Charge pump circuit Charge pump circuit

2007-05-25

2009-06-02

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S543000, C363S060000, C307S110000

Reexamination Certificate

active

07541859

ABSTRACT:
For downsizing a charge pump circuit which selects a voltage multiple ratio, converts its input voltage and outputs the converted voltage, the number of switching devices of the charge pump circuit is reduced. The control circuit of the charge pump circuit is configured to carry out switching control for multiple switching devices and charge/discharge at least a first capacitor and a second capacitor so as to have at least a 2Vi mode for alternately repeating a first state and a second state, and a 1.5Vi mode for alternately repeating a third state and a fourth state, thereby carrying out boosting depending on the detected input voltage.

REFERENCES:
patent: 6563235 (2003-05-01), McIntyre et al.
patent: 6834001 (2004-12-01), Myono
patent: 7233508 (2007-06-01), Itoh
patent: 2008/0084239 (2008-04-01), Oswald et al.
patent: 2003-348821 (2003-12-01), None

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