Switched capacitor circuit capable of minimizing clock...

Details Switched capacitor circuit capable of minimizing clock... Switched capacitor circuit capable of minimizing clock...

2006-02-21

2006-02-21

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

By integrating

C327S157000, C331S1170FE, C331S173000

Reexamination Certificate

active

07002393

ABSTRACT:
A switched capacitor circuit includes a capacitor; a switch element for selectively coupling a first node to a second node according to a control signal, wherein the first node is coupled to the capacitor; and a charge circuit coupled to the first node for coupling the first node to a third node and for controlling a first voltage difference across the first switch element in the off-state to be greater than a charge voltage. By ensuring the charge voltage is large enough to minimize a parasitic capacitance of the switch element, the clock feedthrough effect is eliminated, the locking period of the VCO is shortened, and the phase noise of the VCO is minimized.

REFERENCES:
patent: 6353368 (2002-03-01), Iravani
patent: 6661693 (2003-12-01), Mullarkey et al.
patent: 6812802 (2004-11-01), Godambe et al.

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