Servo address system

Details Servo address system Servo address system

1988-03-28

1990-12-11

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 49, 360 77, 360 50, 360135, G11B 555, G11B 5596

Patent

active

049774727

ABSTRACT:
A dedicated servo disk is encoded with a plurality of bit frames. Each bit frame is positioned between synchronizing bits. Each bit frame contains a first and second portion in timed succession and a plurality of servo bits are arranged in first and second distinct patterns. A bit frame can contain an intermediate code bit with a plurality of intermediate code bits and quadrature position signals used to form the unique track address. The track address is repeated throughout the associated servo track. The dedicated servo disk is used in an servo address system.

REFERENCES:
patent: 3691543 (1972-09-01), Mueller
patent: 4682253 (1987-07-01), Leslie
IBM TDB, vol. 25, No. 2, "Dicell Gray Coding of Disk File Addresses", 7/82, Pennington, pp.376-377.
IBM TDB vol. 20, No. 5, "Phase and Location Coded Servo Pattern For Controlling the Magnetic Head in Track Seek and Track Follow Operations" Schaller, 10/77, pp. 1792-1794.

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