Charge pump

Details Charge pump Charge pump

2007-10-23

2007-10-23

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

11049421

ABSTRACT:
A charge pump that employs a differential amplifier that provides a differential output to control a charge up current source and a charge down current source. The differential amplifier is configured so that the current sources can maintain substantially equal charge up current and charge down current irrespective of the voltage at its output terminal.

REFERENCES:
patent: 5144156 (1992-09-01), Kawasaki
patent: 6114906 (2000-09-01), Fukui
patent: 6526111 (2003-02-01), Prasad
patent: 6853253 (2005-02-01), Desortiaux
patent: 7012473 (2006-03-01), Kokolakis
patent: 2005/0185746 (2005-08-01), Jung

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