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:
Mar. 11, 2008
Filed:
Mar. 02, 2007
Masamichi Fujito, Kodaira, JP;
Yutaka Shinagawa, Iruma, JP;
Kazufumi Suzukawa, Ichikawa, JP;
Ayako Kakuda, Akishima, JP;
Akira Kato, Tachikawa, JP;
Toshihiro Tanaka, Akiruno, JP;
Masamichi Fujito, Kodaira, JP;
Yutaka Shinagawa, Iruma, JP;
Kazufumi Suzukawa, Ichikawa, JP;
Ayako Kakuda, Akishima, JP;
Akira Kato, Tachikawa, JP;
Toshihiro Tanaka, Akiruno, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
The read speed of an on-chip nonvolatile memory enabling electric rewrite is increased. The nonvolatile memory has a hierarchal bit line structure having first bit lines specific to each of a plurality of memory arrays, a second bit line shared between the plurality of memory arrays, a first selector circuit selecting the first bit line for each of the memory arrays to connect the selected first bit line to the second bit line, and a sense amp arranged between the output of the first selector circuit and the second bit line. The hierarchal bit line structure having the divided memory arrays can reduce the input load capacity of the sense amp.