Track access control system for disk system, having eccentricity

Details Track access control system for disk system, having eccentricity Track access control system for disk system, having eccentricity

1989-01-19

1991-01-15

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4434, 360 7704, G11B 700

Patent

active

049858823

ABSTRACT:
A track access control system for a disk storage system having an eccentricity correction unit. The eccentricity correction unit includes an eccentricity detecting unit, an eccentricity data storage unit and an eccentricity compensation unit. The eccentricity data storage unit includes a memory, an address generating circuit, a filter and a comparator. The comparator and the filter function as delta modulation means to provide digital eccentricity data to be stored in the memory. The filter also outputs analog eccentricity data to be used for compensation of the eccentricity.

REFERENCES:
patent: 4476555 (1984-10-01), Joicki et al.
patent: 4527263 (1985-07-01), Nakagawa
patent: 4775966 (1988-10-01), Miura et al.
patent: 4907214 (1990-03-01), Nagano et al.
Nikkei Mechanical 1987.7.13, pp. 66-79.

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