Method and apparatus for automatically adjusting the overshoot o

Details Method and apparatus for automatically adjusting the overshoot o Method and apparatus for automatically adjusting the overshoot o

1993-06-30

1995-06-20

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 509

Patent

active

054265371

ABSTRACT:
A transition overshoot of the record current is usual to compensate record head efficiency loss at high frequencies. Recording compatibility is achieved by decreasing the record current overshoot at the digital data signal transitions as the head gap depth decreases due to wear. Additionally, the different gap depth record heads of different head efficiencies require different optimum record current levels to provide maximum signal-to-noise ratio in the reproduced signal. The head gap depth thus is monitored by means of the optimum record current level without actually measuring the gap depth. The desired amount of overshoot is adaptively adjusted to the gap depth during the recording process by tracking the overshoot to the optimum record current level derived by adjusting the record drive level signal. Recording compatibility between different gap depth heads is achieved using the existing normal record current optimization process during recording.

REFERENCES:
patent: 3618119 (1971-11-01), Rodriguez
patent: 4479152 (1984-10-01), Chi
patent: 5047876 (1991-09-01), Genheimer et al.
patent: 5060088 (1991-10-01), Dolivo et al.
patent: 5107378 (1992-04-01), Cronch et al.
patent: 5121262 (1992-06-01), Squires et al.
patent: 5241429 (1993-08-01), Holsinger
"Transition Asymmetry in High Density Digital Recording", by N. Y. Yeh and R. Niedermeyer, Reprinted from IEEE Transactions on Magnetics, vol. 26, No. 5, Sep. 1990.

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