Charge pump circuit and method of controlling the same

Details Charge pump circuit and method of controlling the same Charge pump circuit and method of controlling the same

2008-02-05

2009-08-18

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

Reexamination Certificate

active

07576592

ABSTRACT:
A charge pump circuit and related method are provided. The charge pump circuit includes first, second and third voltage generation units, first and second control units, and a latch-up prevention unit. The first generation unit regulates a first output signal, the second generation unit boosts a second output signal, and the third generation unit boosts a third output signal in response to the first and second output signals. The first control unit is connected between the first generation unit and the third generation unit, and the second control unit is connected between the second generation unit and the third generation unit. The first and second control units block respective outputs of the first and second generation units during the boosting time for the second output signal. The latch-up prevention unit prevents a latch-up operation caused by a parasitic transistor until the third output signal is maintained at a third voltage.

REFERENCES:
patent: 5732039 (1998-03-01), Javanifard et al.
patent: 6337595 (2002-01-01), Hsu et al.
patent: 6486728 (2002-11-01), Kleveland
patent: 6980045 (2005-12-01), Liu
patent: 7511562 (2009-03-01), Kook et al.
patent: 2005-129815 (2005-05-01), None
patent: 2005-192302 (2005-07-01), None
patent: 2006-120869 (2006-05-01), None

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