Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1990-10-09
1992-04-21
Richardson, Robert L.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 58, 369 4429, 369124, 369 48, G11B 700
Patent
active
051074737
ABSTRACT:
The optical recording/reproducing device of the present invention has an AGC circuit that emits an AGC voltage to be used for controlling the amplification of a reproduced signal in accordance with the amplitude of the reproduced signal, and a controller where permissible ranges for the AGC voltage value is set for recording operation, for erasing operation and for reproduction operation, that, when an optical recording medium is loaded and when one of the recording operation, erasing operation or reproduction operation is instructed, compares the AGC voltage with the permissible range corresponding to the instructed operation and determines whether the AGC voltage is comprised within the permissible range for the instructed operation, and that sets the conditions for the instructed operation for each optical recording medium being loaded in the device. Reproduction/recording/erasing operations may be thus accurately executed in accordance with the characteristics of the recording medium being loaded in the device.
REFERENCES:
patent: 4580255 (1986-04-01), Inane et al.
patent: 4924447 (1990-05-01), Fuji et al.
patent: 5026981 (1991-06-01), Yamane et al.
Deguchi Toshihisa
Fuji Hiroshi
Conlin David G.
Hindi Nabil
O'Connell Robert F.
Richardson Robert L.
Sharp Kabushiki Kaisha
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