Data transducer positioning system for rotating disk data storag

Details Data transducer positioning system for rotating disk data storag Data transducer positioning system for rotating disk data storag

1990-07-09

1992-07-07

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, 318561, G11B 555

Patent

active

051288125

ABSTRACT:
A system for positioning a transducer with respect to a multiplicity of concentric annular data tracks on a rotating hard magnetic disk. Included is a differential amplifier for providing an output proportional to the difference between a transducer speed signal representative of the actual traveling speed of the transducer and a seek speed signal representative of desired variable speed at which the transducer is to be moved to any desired destination track. A low pass filter is provided for eliminating an undesirable higher frequency component from the output from the differential amplifier, before this output is sent to a driver circuit for a transducer positioning motor such as a voice coil motor. In order to minimize the adverse effects arising from the phase lag introduced by the low pass filter, this filter is made switchable between two different cutoff frequencies. Each track seeking operation starts with the low pass filter held at the lower cutoff frequency. The filter is switched to the higher cutoff frequency when the distance between the instantaneous current position of the transducer and the destination track decreases to a predetermined value.

REFERENCES:
patent: 5010425 (1991-04-01), Asai
Thater, George J., Automatic Control Systems, West Publishing Co., 1989, Sec. 11.7.

Affiliated with

Also associated with

Rating

Data transducer positioning system for rotating disk data storag does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data transducer positioning system for rotating disk data storag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data transducer positioning system for rotating disk data storag will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1833885