Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-10-30
2007-10-30
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
Reexamination Certificate
active
11180481
ABSTRACT:
The electric charge transferred in a charge transfer phase from the pump capacitor to the tank capacitor is diminished by reducing the amplitude of the voltage swing on the transfer capacitor proportionally to the current to be supplied. This is done by limiting the maximum voltage on the pump capacitor to a certain value. This maximum value is calculated to make the voltage on the transfer capacitor reach a certain minimum voltage at the end of the charge transfer phase. A charge pump generator includes a driving circuit that isolates the pump capacitor when the voltage on it reaches the maximum value.
REFERENCES:
patent: 6392904 (2002-05-01), Bayer et al.
patent: 6661683 (2003-12-01), Botker et al.
patent: 2002/0105312 (2002-08-01), Knight
patent: 2006/0001474 (2006-01-01), Armaroli et al.
Armaroli Diego
Betta Davide
Ferrari Marco
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Englund Terry L.
Jorgenson Lisa K.
STMicroelectronics S.r.l.
Wells Kenneth B.
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