Digital phase locked loop for sub-μ technologies

Pulse or digital communications – Receivers – Angle modulation

Reexamination Certificate

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C375S376000

Reexamination Certificate

active

07573955

ABSTRACT:
A digital phase locked loop has a digitally controlled oscillator for generating an output frequency, a phase detector device for detecting the phase difference between a reference frequency and an output frequency of the oscillator. The phase detector device contains a delta-sigma frequency decision maker, and a digital loop filter, connected downstream of the phase detector device, for actuating the digitally controlled oscillator.

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