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. 24, 2011
Filed:
Sep. 09, 2010
Satoshi Ishikura, Osaka, JP;
Marefusa Kurumada, Kyoto, JP;
Hiroaki Okuyama, Kyoto, JP;
Yoshinobu Yamagami, Osaka, JP;
Toshio Terano, Osaka, JP;
Satoshi Ishikura, Osaka, JP;
Marefusa Kurumada, Kyoto, JP;
Hiroaki Okuyama, Kyoto, JP;
Yoshinobu Yamagami, Osaka, JP;
Toshio Terano, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A semiconductor memory device comprises a plurality of memory cells each including a holding circuit for holding memory data, and a read-only output circuit for outputting a signal corresponding to the data held by the holding circuit. The read-only output circuit has a read drive transistor controlled in accordance with a signal held by the holding circuit. A gate length of the read drive transistor is longer than a gate length of a transistor included in the holding circuit. Alternatively, the read-only output circuit has a read access transistor controlled in accordance with a read word select signal, and a gate length of the read access transistor is longer than a gate length of a transistor included in the holding circuit.