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. 30, 2006
Filed:
May. 23, 2002
Applicants:
Hiroyuki Takahashi, Kanagawa, JP;
Hideo Inaba, Kanagawa, JP;
Atsushi Nakagawa, Kanagawa, JP;
Inventors:
Assignee:
NEC Electronics Corporation, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 8/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a non-synchronous semiconductor memory device configured as a pseudo-SRAM and capable of relaxing the limitation to address skew and improving the read rate. A data latch circuitholds data having been read out of memory cells in a memory cell arraydesignated by a tow address included in an address ADD in a read mode. Upon transitions of column addresses A, Aincluded in the address, a multiplexersequentially and non-synchronously feeds out the data held in the data latch circuitbased on the column addresses A, A