Regulated charge pump

Details Regulated charge pump Regulated charge pump

2005-06-07

2005-06-07

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S537000, C363S060000

Reexamination Certificate

active

06903599

ABSTRACT:
A regulated charge pump has a negative charge pump for generating a first output voltage according to an oscillation signal, and a regulator. The regulator has a level shift circuit, a differential amplifier for generating a compare signal, and an oscillator for generating the oscillation signal according to the compare signal. The level shift circuit has a plurality serially connected PMOS transistors. A first PMOS transistor has a first source connected to a first reference voltage, and a gate and a drain both connected to an output end of the level shift circuit. A second PMOS has a gate and a drain both connected to an output end of the negative charge pump.

REFERENCES:
patent: 4933827 (1990-06-01), Olivo et al.
patent: 5039877 (1991-08-01), Chern
patent: 5258662 (1993-11-01), Skovmand
patent: 5561385 (1996-10-01), Choi
patent: 6285622 (2001-09-01), Haraguchi et al.
patent: 6373323 (2002-04-01), Kuroda
patent: 6429725 (2002-08-01), Tanzawa et al.
patent: 6518828 (2003-02-01), Seo et al.

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