Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1987-12-21
1989-07-11
Stephan, Steven L.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 13, 369110, G11B 7095, G11B 1304, G11B 1100
Patent
active
048478245
ABSTRACT:
A magneto-optical player employs a differential readback circuit. The differential signal output of the readback circuit is low pass filtered. The filtered signal is converted to a single-ended signal and applied to a field effect transistor (FET). The FET is connected between one of the differential inputs of the readback circuit and a reference potential. The single-ended signal controls the FET to variably attenuate one side of the differential signal for reducing noise induced into the readback signal from diverse sources.
REFERENCES:
patent: 4488277 (1984-12-01), McFarlane et al.
patent: 4561082 (1985-12-01), Gerard et al.
patent: 4688204 (1987-08-01), Moyes et al.
patent: 4785438 (1988-11-01), Mizunoe
patent: 4797872 (1989-01-01), Rokutan
International Business Machines - Corporation
Somermeyer H. F.
Stephan Steven L.
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