Fast switching, dual frequency phase locked loop

Details Fast switching, dual frequency phase locked loop Fast switching, dual frequency phase locked loop

2005-07-26

2009-12-08

Maung, Nay A (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S259000, C455S258000, C455S257000, C455S255000

Reexamination Certificate

active

07630698

ABSTRACT:
A fast switching, dual frequency phase locked loop comprising dual phase/frequency detectors, dual charge pumps, a pair of loop filters, and a low leakage voltage controlled oscillator. Each phase/frequency detector and associated tuning ports of the voltage controlled oscillator can be activated and deactivated separately without disturbing the charge on the loop filters.

REFERENCES:
patent: 4988955 (1991-01-01), Horie
patent: 5821789 (1998-10-01), Lee
patent: 6686804 (2004-02-01), Adams et al.
patent: 7061340 (2006-06-01), Boccuzzi et al.
patent: 7327196 (2008-02-01), Goldberg
patent: 2003/0081653 (2003-05-01), Hardin et al.
patent: 2003/0119466 (2003-06-01), Goldman
patent: 2003/0203743 (2003-10-01), Sugar et al.
patent: 2008/0007365 (2008-01-01), Venuti et al.

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