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:
Jan. 13, 2015
Filed:
Sep. 03, 2009
Applicants:
Masahiro Ishida, Tokyo, JP;
Toshiyuki Okayasu, Tokyo, JP;
Kazuhiro Yamamoto, Tokyo, JP;
Inventors:
Assignee:
Advantest Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 29/56 (2006.01); G01R 31/317 (2006.01); G11C 29/12 (2006.01);
U.S. Cl.
CPC ...
G11C 29/56 (2013.01); G01R 31/31721 (2013.01); G11C 29/12005 (2013.01); G11C 2029/5602 (2013.01);
Abstract
A main power supply supplies a power supply voltage to a power supply terminal of a DUT. A control pattern generator generates a control pattern including a pulse sequence. A compensation circuit intermittently injects a compensation current to the power supply terminal of the DUT via a path different from that of the main power supply. A switch is arranged between an output terminal of a voltage source and the power supply terminal of the DUT, and is turned on and off according to the control pattern.