Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1988-11-14
1992-07-07
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360119, G11B 509, G11B 525
Patent
active
051288117
ABSTRACT:
An apparatus for reproducing a binary digital signal from a track on a magnetic record carrier (1) has a read head (2) with a gap having a gap length (g) which complies with 1.5b.ltoreq.g.ltoreq.2.2b, but which preferably complies with g=2b, b being the bit length of the bits in the digital signal recorded in the record carrier (1). If the read head is followed by a filter device (12) having the characteristic of a Nyquist-1 filter (N1), the overall response of the read head and the filter device will be substantially the same as the response of a class-4 partial-response system (PRF).
REFERENCES:
patent: 2536810 (1951-01-01), Holmes et al.
patent: 3049698 (1962-08-01), Thompson et al.
patent: 4642718 (1987-02-01), Wachenschwanz
patent: 4755891 (1988-07-01), Katoh et al.
Canney Vincent P.
Eason Leroy
U.S. Philips Corporation
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