Amplifier circuit suppressing disturbance signal produced by mag

Details Amplifier circuit suppressing disturbance signal produced by mag Amplifier circuit suppressing disturbance signal produced by mag

1996-07-01

1998-12-22

Faber, Alan

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

327558, 327553, 330149, 360 67, 360 65, G11B 509

Patent

active

058525211

ABSTRACT:
An amplifier for an MR head comprises a means for switching cut-off frequencies of a plurality of lowpass filters, when a data signal superposed by a disturbance signal (a composite signal) is input from an MR head, a means for extracting the disturbance signal from the composite signal, a means for adding the extracted disturbance signal to the composite signal. Accordingly, it possible to obtain a data signal less influenced and less distorted even if a disturbance signal appears.

REFERENCES:
patent: 4914398 (1990-04-01), Jove et al.
patent: 5396188 (1995-03-01), Aoki
patent: 5428314 (1995-06-01), Swafford, et al.
patent: 5648738 (1997-07-01), Welland et al.

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