Low power charge pump

Details Low power charge pump Low power charge pump

2007-02-10

2010-11-16

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

Reexamination Certificate

active

07834672

ABSTRACT:
A charge pump is configured to control current flow at an output node in response to input signals. A plurality of control signals are generated based upon the input signals. The control signals operate to control the timing and duration of current flows within the charge pump and to thereby reduce charge pump power consumption. Based upon the control signals, the conductivity of a first path between a power supply and the output node and a second path between the output node and a ground potential is varied. Optionally, the charge pump is disposed as part of a phase-locked loop (PLL), the input signals are produced by a phase/frequency detector, and current flow at the output node controls an oscillator element.

REFERENCES:
patent: 6124741 (2000-09-01), Arcus
patent: 6256362 (2001-07-01), Goldman
patent: 2002/0140469 (2002-10-01), Lever
patent: 2005/0083090 (2005-04-01), Moraveji

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