Disk drive controller

Details Disk drive controller Disk drive controller

G - Physics

11

B

354/238

G11B 20/22 (2006.01)

Patent

CA 1318412

ABSTRACT The invented controller uses a programmable parameter scheme which makes it possible to read and write 3 1/2 inch variable and fixed speed drives, as well as standard 5 1/4 inch drives. Additionally, the present invention uses a plus/minus rate multiplier to correct for symmetry and frequency errors. Also provided is a form of read post compensation which corrects for peak shift effects on disks with insufficient precompensation. Other advanced features of the present invention include the use of half clock circuits to provide half clock resolution in the signal being written to and read from the disk and the capability of operating at continuously variable clock speeds and data rates dynamically programmable by the computer.

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