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:
Oct. 19, 1999
Filed:
May. 18, 1998
Applicant:
Inventors:
Noriyuki Masuda, Oomiya, JP;
Shinichi Hashimoto, Ageo, JP;
Assignee:
Advantest Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
371 271 ; 371 275 ;
Abstract
Pattern data comprising N=8 words, where one word comprises m=3 bits, delivered in parallel from a pattern memory 2 is input to a parallel/serial conversion circuit 3. The circuit 3 can be switched between a serial output mode (MC='0') in which data for one word per pin is serially delivered every test cycle and a parallel-serial output mode in which parallel data for n-2 words per pin (m.times.n bits) are serially delivered every test cycle in response to a mode control signal MC.