Apparatus and method for demodulating data signals read from a r

Details Apparatus and method for demodulating data signals read from a r Apparatus and method for demodulating data signals read from a r

1996-09-30

1999-03-02

Huber, Paul W.

Dynamic magnetic information storage or retrieval

Modulating or demodulating

Frequency

369 48, G11B 2006, G11B 509

Patent

active

058779078

ABSTRACT:
An apparatus for demodulating a data signal read from a recording medium, in which data is recorded on at least a portion of the recording medium. The data is recorded using a recording system having a substantially constant linear velocity. In this manner, the recording medium is rotated at a substantially constant speed during the reading of data signals such that one of a frequency and an amplitude of the read data signal varies. The apparatus includes a signal processor for processing the read data signal in response to a change in one of the frequency and amplitude to produce a processed data signal suitable for demodulation. Once the processed data signal is produced, a demodulator operates to demodulate the data signal and to produce a demodulated data signal.

REFERENCES:
patent: 5210733 (1993-05-01), Yamaguchi et al.
patent: 5388090 (1995-02-01), Hoshino et al.
patent: 5425014 (1995-06-01), Tsuyuguchi et al.
patent: 5559777 (1996-09-01), Maeda et al.

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