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:
Feb. 04, 2003
Filed:
Dec. 26, 2001
Applicant:
Inventor:
Masanori Miyagi, Chiba, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 1/606 ;
U.S. Cl.
CPC ...
G11C 1/606 ;
Abstract
A non-volatile memory circuit has FLOTOX type memory elements operable with a low data writing voltage even when a difference between threshold voltages of non-volatile memory elements is small. Each data bit is held by two non-volatile memory elements for storing data having a complementary logic relationship. Potentials at data lines are supplied to inputs of a sense amplifier so that even a small potential difference can be detected. As a result, data stored in a pair of non-volatile FLOTOX type memory elements having shallow data writing depths can be read.