Head signal device with noise immunity function, for use in a di

Details Head signal device with noise immunity function, for use in a di Head signal device with noise immunity function, for use in a di

1998-03-31

2000-04-04

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 46, 360 63, G11B 502, G11B 509, G11B 1512

Patent

active

060468769

ABSTRACT:
On an FCP board and in a head amplifier circuit, provided for amplifying a read signal from a head and supplying the read signal to a read channel, a dummy wiring pattern is located near a wiring pattern for supplying the read signal. The head amplifier circuit incorporates a differential amplifier. The differential amplifier finds and amplifies a difference between the read signal supplied through the wiring pattern and the noise signal supplied through the dummy wiring pattern. The differential amplifier outputs to a read channel the read signal from which the noise has been removed.

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