Digital PLL and applications thereof

Details Digital PLL and applications thereof Digital PLL and applications thereof

2007-04-26

2010-10-05

Phu, Sanh D (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

Reexamination Certificate

active

07809345

ABSTRACT:
A digital phase locked loop (PLL) includes a digital phase detector, a digital loop filter, a digitally controlled oscillation module, and a variable feedback divider. The digital phase detector is coupled to produce a difference signal based on a phase difference between a reference oscillation and a feedback oscillation. The digital loop filter is coupled to process the difference signal to produce a control signal. The digitally controlled oscillation module is coupled to generate an output oscillation based on the control signal. The variable feedback divider is coupled to produce the feedback oscillation from the output oscillation based on a divider value and a controlled variable delay.

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patent: 2005/0090222 (2005-04-01), Knecht et al.
patent: 2007/0149144 (2007-06-01), Beyer et al.
patent: 2009/0130988 (2009-05-01), Goldberg

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