Apparatus for causing a head to access a selected one of a plura

Details Apparatus for causing a head to access a selected one of a plura Apparatus for causing a head to access a selected one of a plura

1987-06-02

1989-01-17

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

369 32, 369 50, 360 69, 360 7814, 360 721, 360 7716, G11B 2110

Patent

active

047992050

ABSTRACT:
A reproducing apparatus for reproducing a disc type signal bearing medium, which includes a reproducing transducer head and an automatic tracking control device for aligning the head with a selected track of the medium. The control device includes an electromechanical converting element for moving the head, a signal producing circuit for producing a tracking control signal based on the reproduced signal, a memory circuit for memorizing the control signal, and a switching circuit for selectively connecting the converting element with the signal producing circuit and the memory circuit. In a single track reproducing mode, the switching circuit connects the converting element with the signal producing circuit, and in a successive track reproducing mode, the switching circuit connects the converting element with the memory circuit.

REFERENCES:
patent: 3997876 (1976-12-01), Frush
patent: 4016603 (1977-04-01), Ottesen
patent: 4103314 (1977-06-01), Case
patent: 4136365 (1979-01-01), Chick et al.
patent: 4148082 (1979-04-01), Okada et al.
patent: 4149199 (1979-04-01), Chick et al.
patent: 4205338 (1980-05-01), Schaefer
patent: 4365324 (1982-12-01), Michaelis
patent: 4419701 (1983-12-01), Harrison et al.
patent: 4445153 (1984-04-01), Fujimoto

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