Pick-up point dislocation detecting device in recording a disc p

Details Pick-up point dislocation detecting device in recording a disc p Pick-up point dislocation detecting device in recording a disc p

1982-07-14

1985-01-08

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

250201, G11B 2110, H04N 576

Patent

active

044930682

ABSTRACT:
A pick-up point dislocation detecting device for detecting dislocation of a pick-up point of pick-up means in a disc player. The pick-up point is dislocated from a recorded region of a recording disc being played back on the disc player. The dislocation detecting device compares the signal level of an electric signal obtained from the pick-up means with a reference level. The reference signal corresponds to the signal level of the electric signal when the pick-up point is located within an intervening region between two neighboring tracks on the recording disc. The dislocation detecting device produces a dislocation detection signal when the signal level of the obtained electric signal falls below the reference level.

REFERENCES:
patent: 4232337 (1980-11-01), Winslow et al.
patent: 4359635 (1982-11-01), Gross
patent: 4406000 (1983-09-01), Shoji et al.

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