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公开(公告)号:DE2620657A1
公开(公告)日:1977-02-10
申请号:DE2620657
申请日:1976-05-11
Applicant: IBM
Inventor: MAZZEO NICKOLAS JOSEPH , THOMPSON DAVID ALLEN
IPC: G11C11/14 , G01R15/14 , G01R33/02 , G01R33/09 , G11B5/37 , G11B5/39 , G11C19/08 , H01H36/00 , G11B5/30
Abstract: A thin film magnetoresistive sensor of NiFeCo is juxtaposed with a saturable thin film shield of more highly permeable NiFe material. The curve depicting change of resistance of the sensor as a function of applied magnetic field is flattened, permitting the sensor to provide a magnetic switch, such as a keyboard transducer, a sensor of current through wires, a magnetic bubble detector and a remote control scanning sensor in a recording head. The scanner involves a stepped arrangement for providing different levels of sensitivity for adjacent sections of the magnetoresistive sensor.