Head positioning servo for disk drive

Details Head positioning servo for disk drive Head positioning servo for disk drive

1981-04-27

1983-11-15

Kilgore, Robert Martin

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 77, G11B 2102, G11B 2110

Patent

active

044159390

ABSTRACT:
An improved servo encoding scheme and demodulation circuit for control of the position of a read/write head with respect to a magnetic recording disk is disclosed. First and second signals of like polarity are recorded preceding each data field on the sector of the disk. The signals are summed to provide automatic gain control to the servo loop to compensate for variations in read-back amplitude, while the difference between the two signals is measured and used to provide an indication of departure of the head from the center of the disk track.

REFERENCES:
patent: 3691543 (1972-09-01), Mueller
patent: 3818502 (1974-06-01), Chien et al.
patent: 3893180 (1975-07-01), Braun et al.
patent: 4134053 (1979-01-01), Klinger
patent: 4146911 (1979-03-01), Gyi
patent: 4149200 (1979-04-01), Card
IBM Technical Disclosure Bulletin, vol. 20, No. 8, Jan. 1978 "Sector Servo Method", R. L. Deremer, R. E. Jansen, J. P. Ho.
"Position Signal Detection Circuit", K. K. Fujitsu, Masateru Sasaki, 55-73972 Patent Abstracts of Japan, vol. 4, No. 118 (p.-24) (500) 8/22/80, p. 50P24.

Affiliated with

Also associated with

Rating

Head positioning servo for disk drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Head positioning servo for disk drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head positioning servo for disk drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-162141