Charge pump circuit with a brief settling time and high...

Details Charge pump circuit with a brief settling time and high... Charge pump circuit with a brief settling time and high...

2007-02-13

2007-02-13

Zweizig, Jeffrey (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

10982528

ABSTRACT:
A circuit for converting a direct current input voltage into an output voltage greater than the input voltage. The circuit includes a charge pump and a block for generating pulse signals of a predetermined frequency to be applied to a control input of the charge pump. The settling time, i.e. the time necessary for the output voltage to attain its operating value and to maintain it with a given precision, is reduced by providing the circuit with charge injection control via modulation of the duty cycle of the pulse signals as a function of the difference between the output voltage, or a predetermined fraction thereof, and a predetermined reference voltage and in such a manner as to reduce the settling time as the difference diminishes. The circuit includes a regulator that controls the charge pump based upon the predetermined reference voltage.

REFERENCES:
patent: 5153855 (1992-10-01), Konishi
patent: 5159543 (1992-10-01), Yamawaki
patent: 5426334 (1995-06-01), Skovmand
patent: 5561385 (1996-10-01), Choi
patent: 6249445 (2001-06-01), Sugasawa
patent: 6297687 (2001-10-01), Sugimura
patent: 6597235 (2003-07-01), Choi
patent: 6717458 (2004-04-01), Potanin
patent: 6765428 (2004-07-01), Kim et al.
patent: 6798274 (2004-09-01), Tanimoto
patent: 2003/0210089 (2003-11-01), Tanzawa et al.
patent: 2004/0066225 (2004-04-01), Seo

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