Adjustable system for skew comparison of digital signals

Details Adjustable system for skew comparison of digital signals Adjustable system for skew comparison of digital signals

1983-11-14

1985-09-17

Atkinson, Charles E.

Excavating

371 3, 371 25, G01R 3128, G06F 1100

Patent

active

045425051

ABSTRACT:
A plurality of digital signals from a standard reference digital module can be compared to the corresponding digital signals from a comparable module undergoing test. Thus, a plurality of output signals from the reference module can be compared with the comparable plurality of digital signals from the module under test. A select multiplexor receives the pairs of signals from the source modules and conveys the signal pairs to each of a plurality of skew comparison circuits for analysis and error reporting to a maintenance controller processor. The select multiplexor also permits a self-test generator to check out the skew compare circuitry and also permits a mask register, programmed by the maintenance controller processor, to select only those signal pairs which it is desired to analyze, rather than merely checking all the available pairs of lines in the system.

REFERENCES:
patent: 3528017 (1970-09-01), Zussman
patent: 3633187 (1972-01-01), Proctor et al.
patent: 4122995 (1978-10-01), Franke

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