Self regulating charge pump

Details Self regulating charge pump Self regulating charge pump

2008-05-06

2008-05-06

Tra, Quan (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

07368978

ABSTRACT:
A charge pump includes a transistor of the charge pump modified to regulate a supply voltage to substantially reduce noise from the supply voltage when charging the capacitor of the charge pump and subsequently reduces noise at the voltage output. The charge pump may have a regulating transistor for charging or for pumping or for both. The regulating transistor requires a regulated bulk voltage and a modulated gate voltage to enable regulation of the supply voltage. The regulated bulk voltage may be supplied by a small regulator.

REFERENCES:
patent: 4433282 (1984-02-01), Squires
patent: 5051881 (1991-09-01), Herold
patent: 5905402 (1999-05-01), Kim et al.
patent: 6208196 (2001-03-01), St. Pierre
patent: 6226194 (2001-05-01), Bayer et al.
patent: 6424203 (2002-07-01), Bayadroun
patent: 2005/0017792 (2005-01-01), Kawagoshi
patent: 1349030 (2003-01-01), None

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