Resumes
Resumes
Paul Dounn Phones & Addresses
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Chino Valley, AZ
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1651 Eagle Point Dr, Prescott, AZ 86301 (928) 541-0593
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5777 Honeysuckle Rd, Prescott, AZ 86305 (928) 458-0946
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Iron Springs, AZ
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311 Bayridge Dr, League City, TX 77573 (281) 535-0191
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313 Bayridge Dr, League City, TX 77573 (281) 535-0191
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404 Madison Dr, San Jose, CA 95123 (408) 226-0775
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Tucson, AZ
Publications
Us Patents
Transducer Positioning Servo Mechanisms Employing Digital And Analog Circuits
View pageUS Patent:
49147250, Apr 3, 1990
Filed:
Jul 10, 1989
Appl. No.:
7/377399
Inventors:
Karl A. Belser - Los Gatos CA
Paul J. Dounn - Tucson AZ
Ian E. Henderson - Tucson AZ
Ronald J. Kadlec - Tucson AZ
Spencer D. Roberts - Tucson AZ
Paul J. Dounn - Tucson AZ
Ian E. Henderson - Tucson AZ
Ronald J. Kadlec - Tucson AZ
Spencer D. Roberts - Tucson AZ
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
G05B 1300
US Classification:
318560
Abstract:
A track-seeking system for an optical disk using a velocity control loop with partially-digitized velocity measurement. A quadrature signal is generated based on summing the halves of a position error signal to give directionality to track-crossing counts. A so-called piggy-back construction, wherein a fine positioner is carried by a coarse positioner, is employed. Feed-forward controls are provided from the fine to the coarse positioner. At track-capture time, the dynamic range of the fine positioner is momentarily increased.