Method and apparatus for varying write currents supplied to reco

Details Method and apparatus for varying write currents supplied to reco Method and apparatus for varying write currents supplied to reco

1997-12-16

2000-05-16

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 509

Patent

active

060645342

ABSTRACT:
An optimum write current, which is supplied to a recording head when the recording head is used for recording information onto a recording medium, is set. An ambient temperature is set. A plurality of write currents are set in the set ambient temperature. A signal is written onto the recording medium with the set plurality of write currents and a demodulation margin is detected for each write current of the plurality of write currents. An optimum write current is determined from the plurality of write currents for the ambient temperature based on the demodulation margins detected for the respective write currents. The above-mentioned operations are performed for each of a plurality of ambient temperatures, and an optimum write current is obtained for each ambient temperature of the plurality of ambient temperatures.

REFERENCES:
patent: 5408365 (1995-04-01), Van Doorn et al.
patent: 5455717 (1995-10-01), Van Doorn et al.

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