Patent ID: 6990024
Filing Date: 2006-01-24
Classification: G11C

Abstract:
1. A thin film magnetic memory device comprising: a plurality of memory cells each executing data storage; and a plurality of data lines arranged according to predetermined segments of said plurality of memory cells, respectively, wherein each of said plurality of memory cells includes: a magnetic storage portion magnetized in a direction according to a level of stored data, and having a different electric resistance according to a magnetization direction, and an access element electrically connected to said magnetic storage portion in series between corresponding one of said plurality of data lines and a first voltage, and turned on in at least one selected memory cell as a data read target memory cell, said thin film magnetic memory device further comprises: a select gate electrically connecting the data line corresponding to said selected memory cell among said plurality of data lines to an internal node; and a data read circuit for reading said stored data of said selected memory cell, and wherein said data read circuit includes a constant current circuit electrically connected between a second voltage and said internal node, and supplying a constant current according to a control voltage adjustable in a nonvolatile manner according to an external input, to said internal node, and a voltage amplification circuit generating read data according to a voltages of said internal node.