Write current waveform asymmetry compensation

Details Write current waveform asymmetry compensation Write current waveform asymmetry compensation

2004-03-22

2010-11-23

Negrón, Daniell L (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

Reexamination Certificate

active

07839589

ABSTRACT:
A write current circuit (300, 400) adapted to drive a thin film write head (202) of a mass media information storage device. The write current circuit (300, 400) further includes programming circuitry (311, 411) driven such that parameters of the write current waveform can be varied, including the write current overshoot amplitude and/or overshoot duration. The present invention achieves technical advantages by providing the ability to program out or adjust for system introduced asymmetries in the write current waveform.

REFERENCES:
patent: 6496317 (2002-12-01), Lacombe
patent: 7035027 (2006-04-01), Barnett et al.
patent: 7372649 (2008-05-01), VanEaton et al.
patent: 2002/0151839 (2002-10-01), Landau
patent: 2003/0081339 (2003-05-01), Barnett et al.
patent: 2003/0151839 (2003-08-01), Ikuma et al.

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