Method and apparatus for extracting data from an oversampled...

Details Method and apparatus for extracting data from an oversampled... Method and apparatus for extracting data from an oversampled...

2005-09-13

2005-09-13

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

C702S187000, C702S190000

Reexamination Certificate

active

06944577

ABSTRACT:
Apparatus and method extract data from a data stream. The method includes oversampling the data stream, performing first processing on adjacent bits of the oversampled data stream, performing second processing the results of the first processing, comparing the results of the second processing, and selecting an alignment of data based on the comparison. The method can be efficiently implemented using accumulators, delay elements, and XOR elements. In this manner, data may be extracted from the data stream despite a varying or unknown phase or duty cycle, or in the presence of jitter.

REFERENCES:
patent: 5960388 (1999-09-01), Nishiguchi et al.
patent: 6198420 (2001-03-01), Ryan et al.
patent: 6529148 (2003-03-01), Maddux
patent: 6636816 (2003-10-01), Dvorak et al.

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