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:
Oct. 27, 1992
Filed:
Feb. 26, 1991
Applicant:
Inventor:
Tatsunori Murotani, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; G11C / ;
U.S. Cl.
CPC ...
307449 ; 3072968 ; 36518909 ; 36523006 ;
Abstract
A decoder circuit comprises a P type substrate in which an N well is formed, a plurality of P channel word line drive transistors each having a gate supplied with a signal having a level corresponding to an address signal and a source-drain connected between a word line and an input terminal of a signal driving the word line and the N well is biased with a biasing signal different from said word line drive signal. Gate insulating films of the word line drive transisters are not subjected to breakdown by a high voltage application thereto. Further, since there is no extra load applied to the clock signal, it is possible to make the word line drive at high speed.