Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2011-03-01
2011-03-01
Tra, Quan (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
07898319
ABSTRACT:
A method and apparatus are provided for improving the efficiency in charge pump systems for low power applications. This first embodiment provides a method and apparatus which defines a charge pump output voltage high target which turns off a charge pump enable signal and a charge pump outlet voltage low target which turns on a charge pump enable signal. A second embodiment defines a protection time where the charge pumping continues until a predefined phase is completed and the leakage paths are disabled. A third embodiment defines a phase memory block, which continues or remembers the phase until the next request for charge pumping. This prevents the circuitry from entering a window where charge leakage, which diminishes charge pumping efficiency, could occur.
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Hsu Jenshou
Ting Tah-Kang Joseph
Ackerman Stephen B.
Etron Technology Inc.
Saile Ackerman LLC
Tra Quan
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