Charge pump circuit

Details Charge pump circuit Charge pump circuit

2007-04-24

2007-04-24

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S157000, C363S060000

Reexamination Certificate

active

11089031

ABSTRACT:
A reverse current is prevented in a charge pump circuit. A complementary pair of clocks CLK and *CLK varies while a first through a fourth charge transfer MOS transistors M11,M12,M13and M14are turned off. Then the second charge transfer MOS transistor M12is turned on to discharge a first pumping capacitor CA and the third charge transfer MOS transistor M13is turned on to charge a second pumping capacitor CB. Next, the complementary pair of clocks CLK and *CLK varies after the first through the fourth charge transfer MOS transistors M11,M12,M13and M14are turned off again. Then the fourth charge transfer MOS transistor M14is turned on to discharge the second pumping capacitor CB and the first charge transfer MOS transistor M11is turned on to charge the first pumping capacitor CA.

REFERENCES:
patent: 6429723 (2002-08-01), Hastings
patent: 7046076 (2006-05-01), Daga et al.
patent: 2001-211637 (2001-08-01), None

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