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. 19, 1993
Filed:
Apr. 05, 1991
Applicant:
Inventors:
Richard C Foss, Kirkcaldy Fife, GB;
Valerie L Lines, Ottawa, CA;
Assignee:
Mosaid, Inc., Ontario, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365203 ; 365226 ;
Abstract
A method and apparatus for precharging memory cell bit storage capacitors and bit lines of a DRAM from a single source. The storage capacitor reference plate is driven from a high impedance voltage divider, minimizing the effects of voltage supply noise, so that noise does not couple into the storage capacitor and turn on the associated capacitor access transistor. At the same time the bit line is driven from a low impedance drive, to enable it to maintain the bit line midpoint voltage. The bit line precharge voltage is referenced to the storage capacitor reference voltage providing good cell margin.