Magnetic recording drive having arrangements for average useful

Details Magnetic recording drive having arrangements for average useful Magnetic recording drive having arrangements for average useful

1994-09-13

1996-11-05

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360113, G11B 503, G11B 533, G11B 5127

Patent

active

055723799

ABSTRACT:
In a magnetic recording drive having a plurality of magnetic heads each employing a magnetoresistive sensor for the purpose of averaging the time required for sense currents to be caused to flow through the respective magnetoresistive sensors to shorten the longest reproducing time and to suppress the degradation of the characteristics due to the electromigration, thereby improving the reliability of the magnetic recording drive, the magnetic recording drive includes circuits for averaging the useful life depending on the currents caused to flow through the respective magnetoresistive sensors among the plurality of magnetic heads, whereby the time required for the sense current to be caused to flow through one MR reproducing head is greatly shortened. Therefore, the levels of outputs of the MR reproducing heads can be increased without reduction of the reliability and thus the reliability of the magnetic recording drive can be improved.

REFERENCES:
patent: 4833559 (1989-05-01), Belk
patent: 5282104 (1994-01-01), Coutellier et al.
patent: 5325242 (1994-06-01), Fukuchi et al.
patent: 5367411 (1994-11-01), Nishiyama et al.
patent: 5412518 (1995-05-01), Christner et al.
"Extended Life Magnetoresistive Head", IBM Technical Bulletin, vol. 17, No. 9, Feb. 1975.
"Adjustable Read Bias Current For Enhanced Head Reliability", IBM Technical Disclsoure Bulletin, vol. 33, No. 5, Oct. 1990.
"Optimal Method of Increasing Life of Magnetoresistive Head in Sector Servo", IBM Technical Disclosure Bulletin, vol. 34, No. 6, Nov. 1991.
"Multi-Rate Servo For the Reduction of Magneto-Resistive Head ON Time", IBM Technical Disclosure Bulletin, vol. 33, No. 4, Sep. 1990.

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