Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1985-04-12
1987-05-05
Faber, Alan
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369111, 250202, G11B 7095
Patent
active
046637494
ABSTRACT:
An apparatus is described for reading optically coded discs. In this apparatus the photodiode signals are amplified by current amplifiers which are biased by the unipolar photodiode signal currents, so that offset-free class-B operation is obtained.
REFERENCES:
patent: 4446545 (1984-05-01), Dijk
patent: 4454416 (1984-06-01), Gontowski
patent: 4475182 (1984-10-01), Hosaka
patent: 4588961 (1986-05-01), Rao
patent: 4591804 (1985-02-01), Tuijl
"Universal Current Mirror", by Radovsky, RCA Tech. Notes .COPYRGT.10/28/75.
Bierhoff Martinus P. M.
Schoofs Franciscus A. C. M.
Slomp Albert H.
Van Mil Job F. P.
Briody Thomas A.
Faber Alan
Rich Marianne R.
Streeter William J.
U.S. Philips Corporation
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