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:
Mar. 19, 1985
Filed:
Jul. 30, 1980
Applicant:
Inventor:
Alan J Melia, Ipswich, GB;
Assignee:
The Post Office, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324 / ; 324 / ;
Abstract
An integrated circuit is tested by applying to it the output of a clocked word generator. The resulting output from the circuit is analyzed by a phase sensitive detector comprising a series of sampling switches and integrators which are synchronized with the generator frequency. The output spectrum is compared with that of a reference to evaluate the quality of the circuit.