The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 1984
Filed:
Feb. 24, 1981
Charles P Bockett-Pugh, Bracknell, GB;
Brian L Kett, Poole, GB;
The Solartron Electronic Group Limited, Farnborough, GB;
Abstract
A digital circuit tester for performing signature analysis is provided with a memory (32) for storing successive samples at 256-bit intervals of the progressively evolving CRC signature of a signal in the circuit under test. Comparison with the same sequence from a known good unit facilitates identification of faults, even in feedback loops. To identify the first failing bit, the test is repeated, but with the CRC feedback connections disabled, and successive blocks of the actual data stream are stored, beginning at the point corresponding to the first faulty signature sample, for subsequent inspection and comparison with the data stream from the known good unit.