Write circuit providing selective waveform correction based on r

Details Write circuit providing selective waveform correction based on r Write circuit providing selective waveform correction based on r

1993-03-08

1994-10-25

Shepperd, John

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 61, G11B 509, G11B 1512

Patent

active

053594673

ABSTRACT:
A write circuit includes a waveform correction circuit for changing a waveform of leading and trailing portions of a write current so that a read circuit of the magnetic recording apparatus for magnetically recording at a recording density lower than the predetermined recording density can read the recorded signal. The waveform correction circuit is inserted between a coil of a magnetic head of the magnetic recording apparatus and a binary signal generator circuit when it receives a selection signal for selecting a recording state corresponding to the magnetic recording apparatus with the low recording density.

REFERENCES:
patent: 4467374 (1984-08-01), Batey et al.
patent: 4780771 (1988-10-01), Miyazaki et al.
patent: 4803571 (1989-02-01), Fujioka et al.
patent: 4809088 (1989-02-01), Lofgren et al.
patent: 4866692 (1989-09-01), Saito et al.
patent: 5161071 (1992-11-01), Nakamura
patent: 5216553 (1993-06-01), Nakamura

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