Chopper sensor for MRAM

Details Chopper sensor for MRAM Chopper sensor for MRAM

2005-12-27

2005-12-27

Elms, Richard (Department: 2824)

Static information storage and retrieval

Read/write circuit

Flip-flop used for sensing

C365S206000, C365S225500

Reexamination Certificate

active

06980477

ABSTRACT:
A sensor for a magnetic random-access memory (MRAM) of an embodiment of the invention includes an amplifier having at least two inputs and at least two outputs. The inputs are coupled to a magnetic storage element of the MRAM having a resistance corresponding to a value stored thereby and the outputs provide an output voltage corresponding to the resistance of the magnetic storage element. The sensor comprises a chopper switch coupled between one input of the amplifier and the magnetic storage element, a chopper switch coupled between another input of the amplifier and the magnetic storage element, and a chopper switch coupled between the outputs of the amplifier.

REFERENCES:
patent: 3609499 (1971-09-01), Scheerer
patent: 3968420 (1976-07-01), Yoshida
patent: 4545006 (1985-10-01), Vitins
patent: 6327164 (2001-12-01), Shinkawa
patent: 6597600 (2003-07-01), Baker
patent: 6678197 (2004-01-01), Perner et al.
patent: 6826102 (2004-11-01), Baker
patent: 6829188 (2004-12-01), Baker

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