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. 17, 2018
Filed:
Aug. 13, 2015
Applicant:
Advantest Corporation, Nerima-ku, Tokyo, JP;
Inventors:
Takashi Kusaka, Tokyo, JP;
Masahiro Ishida, Tokyo, JP;
Assignee:
ADVANTEST CORPORATION, Nerima-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/28 (2006.01); G01R 31/02 (2006.01); G01R 31/317 (2006.01); G11C 29/02 (2006.01); G11C 29/56 (2006.01);
U.S. Cl.
CPC ...
G01R 31/3171 (2013.01); G11C 29/028 (2013.01); G11C 29/56008 (2013.01); G11C 29/56012 (2013.01);
Abstract
A reception circuit receives, via a cable, a transmission signal Sgenerated by a DUT. A comparator circuit compares a reception signal Safter signal transmission with at least one threshold signal V, and generates a judgment value Dthat represents a comparison result for every sampling timing. A threshold generation circuit generates at least one threshold signal V. A threshold control circuit adjusts each level of at least one threshold signal Vat a given sampling timing based on the history of the judgment value Dacquired at a past sampling timing.