Data sampler for digital frequency/phase determination

Details Data sampler for digital frequency/phase determination Data sampler for digital frequency/phase determination

2007-06-05

2007-06-05

Deppe, Betsy L. (Department: 2611)

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

C375S371000, C327S002000, C327S009000, C327S039000, C327S044000

Reexamination Certificate

active

11400449

ABSTRACT:
A digital circuit and method for forming number streams for frequency and/or phase comparison of digital or digitized signals, referred to herein as clock signals, where typically one of the clock signals is a known clock signal and another of the clock signal is an unknown clock signal. The unknown clock signal may be derived, for example, from a communications signal. The rate of the unknown clock signal may exceed the rate of the known clock signal. In an exemplary embodiment, an “alias” value (e.g., an integer 1, 2, 3, etc.) is applied to the circuit as an indication of the expected frequency range of the unknown clock signal. The number stream is formed accordingly.

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International Search Report, Publication No. WO 03/023951 A3,International Application No. PCT/US02/14053, publication date Mar. 20, 2003.
Written Opinion, International Application No. PCT/US02/14053, date mailed Jan. 28, 2005.

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