Parallel pseudorandom pattern generator with varying phase shift

Details Parallel pseudorandom pattern generator with varying phase shift Parallel pseudorandom pattern generator with varying phase shift

1988-12-09

1990-09-25

Smith, Jerry

Excavating

364717, G06F 1100

Patent

active

049598325

ABSTRACT:
Phase enhancement means are employed in conjunction with linear feedback shift registers to generate sequences of binary pattern vectors which are much more structurally independent of one another thus enabling more thorough and comprehensive testing of integrated circuit systems. More particularly, the present invention employs a plurality of exclusive-OR gates in an array of one gate per register output cell to generate the desired uncorrelated pattern strings. This facilitates testing of integrated circuit devices and systems and is particularly useful for built-in test situations for very large scale integrated circuits which employ pseudorandom test methods.

REFERENCES:
patent: 3986168 (1976-10-01), Anderson
patent: 3988538 (1976-10-01), Patten
patent: 4023026 (1977-05-01), O'Farrell
patent: 4320513 (1982-03-01), Lampert
patent: 4340857 (1982-07-01), Fasang
patent: 4571556 (1986-02-01), Gnerlich
patent: 4769777 (1988-09-01), Bittle et al.
patent: 4771429 (1988-09-01), Davis et al.
patent: 4775977 (1988-10-01), Dehara
patent: 4839841 (1989-06-01), Hagen et al.
patent: 4852023 (1989-07-01), Lee et al.
patent: 4860236 (1989-08-01), McLeod et al.
patent: 4864525 (1989-09-01), Kurihara et al.
P. Beaven, "Diagnostic Instruction for Microprocessors", IBMTDB, pp. 4628-4629, 4/1978.
IBM Technical Report TR00.3451, entitled "Minimum Two-Way Exclusive-OR Realization of LFSRs" by P. H. Bardell, May 6, 1987.

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