Charge pump

Details Charge pump Charge pump

2007-11-01

2010-06-29

Nguyen, Matthew V (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C323S282000

Reexamination Certificate

active

07746676

ABSTRACT:
A charge pump includes a first capacitor, a first switch with adjustable on-state resistance, a second switch, a third switch, a fourth switch, a feedback loop, and an oscillator. The first switch is coupled between a first electrode of the first capacitor and an output node. The second switch is coupled between a second electrode of the capacitor and ground. The third switch is coupled between an input node and the second electrode of the capacitor. The fourth switch with adjustable on-state resistance is coupled between the input node and the first electrode of the capacitor. The feedback loop monitors a regulated voltage of the output node and generates a control signal to regulate resistances of the first, fourth switches. The oscillator generates a first and second pulse signals to switch the open and close states of the first, third switches and the second, fourth switches, respectively.

REFERENCES:
patent: 4812961 (1989-03-01), Essaff et al.
patent: 6201717 (2001-03-01), Grant
patent: 6411531 (2002-06-01), Nork et al.
patent: 6438005 (2002-08-01), Walter
patent: 2008/0079393 (2008-04-01), Spartano et al.

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