Apparatus and method for multi-phase digital sampling

Details Apparatus and method for multi-phase digital sampling Apparatus and method for multi-phase digital sampling

2005-11-18

2009-08-04

Fan, Chieh M (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S354000, C375S355000, C375S360000, C375S371000, C375S373000, C375S374000, C375S375000, C375S376000

Reexamination Certificate

active

07570721

ABSTRACT:
A method and apparatus for determining a relationship between an input signal frequency and a reference signal frequency is envisioned. The system derives a plurality of internal reference signals from the reference signal. The internal reference signals are provided to a level detection circuit which in turn samples the input signal a number of times within a period of time. Values associated with these samples are stored, as is one value of a sample from a previous period. The stored samples are correlated, and a relationship between the input signal frequency and the reference signal frequency is derived.

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