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. 02, 2002
Filed:
Mar. 23, 1999
Thyagaraju Damarla, Germantown, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A built-in test system for analog or mixed signal circuits comprises a discretizer for discretizing analog test signals monitored at various node points of the circuit under test into suitable discrete values. The discrete values are compared with a reference signature in an analog signature generator to determine if a fault is likely. Since analog signature generators use multilevel data, the computations are performed in Galois field GF(p), where p is the radix. The analog signature generator is constructed using current-mode shift registers, signal discretizers, signal level shifters, mod-p adders, subtractors and multipliers.