Disk drive servo demodulation system which suppresses noise on t

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

369 4426, 360 7704, G11B 5596

Patent

active

058018956

ABSTRACT:
A disk drive servo system which provides a position error signal with an increased signal to noise ratio. Mixing waveforms are generated for mixing with dibit burst signals created when a transducer on a recording head of a disk drive magnetically couples to reference position dibits located on a magnetic surface of the disk drive. The mixing waveforms are formed from a finite integer number of sine waves which are coherent with the dibit burst signals. The mixed dibit burst signal are integrated and summed to create the position error signal. Customizing the mixing waveforms allows the signal to noise ratio of the position error signal to be maximized when a magneto-resistive transducer within the disk drive servo system has one of several non-ideal characteristics.

REFERENCES:
patent: 4488188 (1984-12-01), Hansen et al.
patent: 4633187 (1986-12-01), Nishimura et al.
patent: 4871974 (1989-10-01), Davis et al.
patent: 5301072 (1994-04-01), Wilson
patent: 5343340 (1994-08-01), Boutaghou et al.
Hiroaki Yada and Toru Takeda, "A Coherent Maximum Likeihood Head Position Estimator for Perm Disk Drives", APMRC '95, Nov. 29-Dec. 1, 1995, FB-04-1-FB-04-1.
A. J. Betts, "Null Servo Pattern", IBM Technical Disclosure Bulletin, vol. 18, No. 8, Jan., 1976, pp. 2656-2657.
G. Tyson Tuttle, "A 130 Mb's PRML Read/Write Channel with Digital-Servo Detection", ISSCC '96, Feb. 8, 1996, pp. 48-49/64-65.
J. M. Mendel, Lessons in Digital Estimation Theory:, pp. 89-99, Prentice Hall, 1987.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Disk drive servo demodulation system which suppresses noise on t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk drive servo demodulation system which suppresses noise on t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive servo demodulation system which suppresses noise on t will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-276129

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.