Magnetic playback system

Details Magnetic playback system Magnetic playback system

1997-11-07

2000-07-04

Edun, Muhammad

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 741, 360 65, G11B 1546

Patent

active

060847379

ABSTRACT:
A magnetic playback system wherein, during high-speed playback, the speed of rotation of a drum motor is controlled so that the data rate of the playback signal from that one of two rotary heads for which the scanned area on the magnetic tape from which a playback signal can be obtained is larger, will be equal to the data rate of the recorded digital data signal. This drum motor speed control is effected by a speed control servo loop that includes a frequency detector which controls the speed control servo loop based on a speed detection signal and a speed information voltage generated by a speed information voltage generator. The speed information voltage generator generates this speed information voltage based on a control signal played back from the tape by a control head and a tape direction signal.

REFERENCES:
patent: 4600952 (1986-07-01), Igata et al.
patent: 4757408 (1988-07-01), Umeda
patent: 5341248 (1994-08-01), Amada et al.

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