Dynamic magnetic information storage or retrieval – Recording or reproducing an information signal and a control...
Patent
1991-07-01
1993-10-19
Mullins, James B.
Dynamic magnetic information storage or retrieval
Recording or reproducing an information signal and a control...
358315, 360 67, G11B 502
Patent
active
052551261
ABSTRACT:
A recording and reproducing apparatus in which signals are recorded onto and reproduced from a magnetic tape wound around a peripheral surface of a rotary drum by magnetic heads which are attached to the peripheral surface of the rotary drum corresponding to a plurality of channels, respectively, comprises at least: a detector to detect an envelope level of a reproduced RF signal which is derived from the magnetic head every channel; a comparator to compare the detection output and a reference level and to generate a control voltage corresponding to the magnetic head every channel; a latch to store the control voltage; and a circuit to make the envelope level of the reproduction RF signal constant in accordance with a predetermined timing for supplying the control voltage.
REFERENCES:
patent: 3949414 (1976-04-01), Hayashi
patent: 4041526 (1977-08-01), Kaneko
patent: 4445142 (1984-04-01), Horstmann
patent: 4700239 (1987-10-01), Yoshinaka et al.
patent: 4991034 (1991-02-01), Sato
Matsuzawa Hiroshi
Sato Ichitaro
Urata Kaoru
Kananen Ronald P.
Mullins James B.
Sony Corporation
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