Digital phase detector and charge pump system reset and balanced current source matching

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United States of America Patent

PATENT NO 6140853
SERIAL NO

09339435

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Abstract

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A digital phase detector and charge pump circuit system reset circuit and method resets a digital phase detector according to the charge outputs between the charge pump circuits and a following loop filter. The sensing circuitry emulates portions of the circuitry of the digital phase detector and charge pump circuit system and minimizes deadband time. Current mirror portions of the charge pump circuit alternate between p-channel and n-channel devices to regularize output voltage levels produced by the charge pump circuit system.

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Patent Owner(s)

Patent OwnerAddress
PLL TECHNOLOGIES INC2711 CENTERVILLE ROAD SUITE 400 WILMINGTON DE 19808

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lo, Chung-Wen Dennis Foster City, CA 4 129

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