Magnetic recording reproducer having a controller for detecting

Details Magnetic recording reproducer having a controller for detecting Magnetic recording reproducer having a controller for detecting

1989-10-27

1993-05-25

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 70, 360 7701, G11B 2104, G11B 5584

Patent

active

052145468

ABSTRACT:
A magnetic recording reproducer having a system controller for detecting a level obtained by integrating and averaging a television signal reproduced by using a head thereof within a predetermined integrating time interval when reproducing the television signal recorded on a magnetic tape. Detecting a tracking position of the head is done by changing a relative positional between the head and the magnetic tape by driving a servo circuit. The reproducer includes a rectifier for rectifying the reproduced signal and converting the reproduced signal into a signal indicating a DC level, a voltage controlled current source for varying an output current in response to an output voltage of the rectifier, a capacitor charged by the output current of the voltage controlled current source, a level detecting circuit for detecting a charged voltage of the capacitor and a reset signal generating circuit for discharging and controlling the capacitor in synchronization with integrating time interval.

REFERENCES:
patent: 3890558 (1975-06-01), Guisinger et al.
patent: 4402022 (1983-08-01), Hirota et al.
patent: 4590523 (1986-05-01), Honjo et al.
patent: 4613914 (1986-09-01), Kobori et al.
patent: 4646175 (1987-02-01), Sokolik et al.
patent: 4771188 (1988-09-01), Cheng et al.
patent: 4812926 (1989-03-01), Jeon
patent: 4918546 (1990-04-01), Saito
patent: 5055952 (1991-10-01), Noh
Microelectronics; Millman, Jacob; 1979 ISBN 0-07-042327-X.

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