Magnetic reproduction apparatus having MR head in which electrom

Details Magnetic reproduction apparatus having MR head in which electrom Magnetic reproduction apparatus having MR head in which electrom

1997-12-30

2000-12-19

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 7702, G11B 503, G11B 5596

Patent

active

061634255

ABSTRACT:
In a magnetic reproduction apparatus having an MR head, electromigration occurs when a sense current is supplied to the MR head is suppressed, and the service life and reliability of the magnetic reproduction apparatus are improved. Information magnetically recorded on at least one recording medium is read by supplying a sense current to the MR head opposed to the record surface of the recording medium using a current supply circuit, and then decoded by a signal decoder. In the magnetic reproduction apparatus, an MR head information judgment circuit judges whether or not information to be read out from the recording medium by the MR head is needed. Only when the information to be read out by the MR head is needed, does a current supply control circuit allow the current supply circuit to supply the sense current to the MR head. The sense current can be controlled by turning on or off an on-off operation circuit. Owing to this configuration, electromigration can be suppressed and the service life and reliability of the apparatus can be improved.

REFERENCES:
patent: 5323278 (1994-06-01), Contreras et al.
patent: 5343337 (1994-08-01), Jurneke
patent: 5572379 (1996-11-01), Aoi et al.
patent: 5606470 (1997-02-01), Shioya et al.

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