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:
Nov. 02, 1993
Filed:
Nov. 12, 1991
Applicant:
Inventors:
Nicholas J Spence, Mesa, AZ (US);
Glen D Caby, Tempe, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
371 224 ; 371 225 ;
Abstract
A built-in self test (BIST) circuit verifies the operation of a circuit under test in an integrated circuit. The BIST generates a series of test vectors with linear feedback shift register (LFSR) and applies the test vectors to the circuit under test. The output signal from the circuit under test in response to the test vectors is routed back and accumulating in a predetermined manner in the LFSR for providing a test signature. Thus, the same components in the LFSR generating the test vector also perform the accumulation of the test signature. The accumulating test signature may be used as a subsequent test vector.