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, 2000
Filed:
Mar. 03, 1999
Applicant:
Inventors:
Makoto Kojima, Osaka, JP;
Tomoko Ogura, Wappingers Falls, NY (US);
Assignees:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Halo LSI Design and Device Technologies, Inc., Wappingers Falls, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518523 ; 36518525 ; 36518518 ;
Abstract
A plurality of pull-down transistors, each grounding a source line at discrete positions, are provided in order that current, flowing from bit lines through some of nonvolatile memory cells having lower threshold voltages into the source line, is not concentrated at a single pull-down transistor in a source line driver during a read cycle.