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:
Aug. 15, 2000
Filed:
Aug. 20, 1998
Applicant:
Inventor:
Junichi Ogane, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ; G11C / ;
U.S. Cl.
CPC ...
36518508 ; 36518504 ; 36518521 ; 36518528 ; 36518533 ;
Abstract
A non-volatile semiconductor memory device has a data latch that stores data to be written into memory cells, and functions as a sense amplifier for data read from the memory cells. Read data and write data have opposite polarities in the data latch. A data polarity control circuit in the memory device generates a selection signal indicating whether the data latch stores read data or write data. A data polarity switch generates externally readable data by outputting read data stored in the data latch, and by inverting write data stored in the data latch.