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. 01, 2002
Filed:
Dec. 13, 2001
Applicant:
Inventor:
Xiao Hong Du, Colorado Springs, CO (US);
Assignee:
Ramtron International Corporation, Colorado Springs, CO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 1/122 ;
U.S. Cl.
CPC ...
G11C 1/122 ;
Abstract
An implementation of 1T/1C nonvolatile ferroelectric RAMS without using any reference cells—the polarization state in a memory cell is determined by applying two consecutive plate pulses on the ferroelectric capacitor in the memory cell, preamplifying the bit line voltages corresponding to these two plate pulses, and comparing the preamplified voltages. The two consecutive plate pulses have the same polarity.