Charge pump with at least two outputs

Details Charge pump with at least two outputs Charge pump with at least two outputs

2007-10-16

2007-10-16

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C363S059000, C307S110000

Reexamination Certificate

active

11161178

ABSTRACT:
“A charge pump used for producing at least a first output voltage and a second output voltage according to an input voltage is disclosed. The charge pump includes a pump unit, first to fourth switches, a first output capacitor and a second output capacitor. During a first period, the input voltage and a first voltage, through a first end and a second end of the pump unit respectively, charge at least an internal capacitor. During a second period, the internal capacitor, based on a second voltage level of the first switch and through the second switch, provides the first output capacitor with charges for producing the first output voltage. Finally, during a third period, the internal capacitor, based on a third voltage level of the third switch and through the fourth switch, provides the second output capacitor with charges for producing the second output voltage.”

REFERENCES:
patent: 5262934 (1993-11-01), Price
patent: 5532916 (1996-07-01), Tamagawa
patent: 6906577 (2005-06-01), Kim
patent: 6960955 (2005-11-01), Nonaka
patent: 2005/0012542 (2005-01-01), Kushima et al.

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