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:
Dec. 17, 2002
Filed:
Mar. 05, 2002
Applicant:
Inventor:
Peter K. Naji, Gilbert, AZ (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 1/100 ;
U.S. Cl.
CPC ...
G11C 1/100 ;
Abstract
Readout circuitry for a magnetic tunneling junction (MTJ) memory cell, or an array of MTJ memory cells, is disclosed which requires a varying reference voltage equal to (V /2)(1+R /R ), where V is a clamping voltage applied to the readout circuitry, R is a minimum resistance of the magnetic tunneling junction memory cell, and R is a maximum resistance of the magnetic tunneling junction memory cell. A reference voltage generator is disclosed which generates the reference voltage and includes an operational amplifier and two MTJ memory cells connected to provide an output signal equal to (V /2)(1+R /R ).