Data recording and reproducing apparatus having read/write circu

Details Data recording and reproducing apparatus having read/write circu Data recording and reproducing apparatus having read/write circu

1993-11-12

1995-05-16

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 53, G11B 509

Patent

active

054166462

ABSTRACT:
A hard disk drive (HDD) stores a plurality of parameter data for determining a filter characteristic, which is necessary for the operation of a read/write circuit, to ROM in advance. At the time of driving HDD, a host computer designates parameter data in a predetermined order, and executes a verification processing with the operation of the read/write circuit for every parameter data. The host computer determines parameter data showing a minimum read error rate as a suitable value in accordance with the result of the verification processing. A CPU of HDD stores parameter data having the suitable value determined by the host computer to a nonvolatile read/write memory. CPU sets a parameter, which corresponds to parameter data stored in the read/write memory, in the read/write circuit.

REFERENCES:
patent: 4794469 (1988-12-01), Kaido et al.
patent: 4821125 (1989-04-01), Christensen et al.
patent: 4908722 (1990-03-01), Sonobe
patent: 5077623 (1991-12-01), McSweeney
patent: 5172280 (1992-12-01), Quintus et al.

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