Information recording and reproducing apparatus

Details Information recording and reproducing apparatus Information recording and reproducing apparatus

1982-09-02

1985-10-08

Wolff, John H.

Dynamic magnetic information storage or retrieval

Modulating or demodulating

Frequency

360125, G11B 504

Patent

active

045463921

ABSTRACT:
A transmission system, which includes a recorder/reproducer with at least one frequency incapable of producing an output other than a direct current component and which transmits information in a frequency higher than the frequency incapable of producing an output, has an information recording and reproducing apparatus wherein a transformation circuit transforms a first data sequence including the information into a second data sequence, in accordance with frequency characteristics of the transformation circuit, which second data sequence can then be transmitted, and wherein a restoring circuit restores the first data sequence from a third data sequence obtained after transmission.

REFERENCES:
patent: 4152733 (1979-05-01), Welwisch
IEEE Transactions on Magnetics, vol. Mag. 16, No. 5, Sep. 1980, "Studies of the Perpendicular Magnetization Mode . . . " by Iwasaki et al., pp. 1111-1113.
IEEE Transactions on Communication, vol. Com. 23, No. 9, Sep. 1975, "Partial Response Signaling" by Kabal et al., pp. 921-934.

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