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. 21, 1995
Filed:
Jan. 07, 1993
Applicant:
Inventor:
Kazuyuki Nakamura, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365190 ; 327 51 ; 327543 ;
Abstract
A read circuit is comprised of a circuit for reading out a data signal from one selected among a plurality of arrayed semiconductor memory cells by using a cascode type sense amplifier, in which the drop of the power supply voltage level and the level shift of the bit lines are properly set to allow the cascode type sense amplifier to operate at a low voltage. The bit lines are clamped to a low voltage level obtained by lowering the power supply voltage level and then the voltage level of the bit lines is shifted by one-stage wired-OR logic circuit in order to assure the stable operation of the cascode type sense amplifier.