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:
May. 23, 2006
Filed:
Jan. 21, 2005
Applicants:
Ryuji Nishihara, Osaka, JP;
Masashi Agata, Osaka, JP;
Toshiaki Kawasaki, Osaka, JP;
Masanori Shirahama, Shiga, JP;
Inventors:
Ryuji Nishihara, Osaka, JP;
Masashi Agata, Osaka, JP;
Toshiaki Kawasaki, Osaka, JP;
Masanori Shirahama, Shiga, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a normal operation, an output of a differential amplifier for amplifying a difference between first and second bit cells is output as readout data. In a test mode, when a first control signal is set to be 'H', the output of the differential amplifier is fixed to be 'H' and thus an output of the first bit cell is read out through gates.