Ltx Corporation

Brent Schusheim

James Craig Ziegler

Roy Miles

A digital tester includes a digital data pattern aligner. The digital data pattern aligner includes an alignment pattern source, a data shifter, and a data comparator. The alignment pattern source sends an alignment pattern to the comparator in a data stream. The comparator samples the data stream and compares the samples to a copy of the alignment pattern. The shifter shifts the data in the data stream so long as the comparator detects no match between a data stream sample and the copy of the alignment pattern. When a match is detected, the pattern source and the comparator are in alignment and other data, such as test patterns, may be sent to the comparator or associated components.

Apparatus and method for data pattern alignment

A data shifter selects data from a plurality of data blocks to effectively 'window' data contained within the blocks. A second stage of shifting may be implemented by selection among the resultants of the windowing step. Such a shifter may find use in a data aligner.

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Wenham, MA, United States of America

Brent Schusheim