Optical disk storage unit having a servo system with different v

Details Optical disk storage unit having a servo system with different v Optical disk storage unit having a servo system with different v

1984-07-05

1986-12-02

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 30, 369111, G11B 7085

Patent

active

046270388

ABSTRACT:
An optical disk storage unit has an improved access and tracking system in which a low speed velocity signal is derived from a differentiated position error signal. The output of the differentiator is applied to a blanking circuit which disconnects the steep slope portion of the position error signal from a sample and hold circuit. A medium speed velocity signal is derived from the integral of motor current and a high speed velocity signal is derived by digitally counting the band crossings in the position error signal.

REFERENCES:
patent: 4236232 (1980-11-01), Jansen et al.

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