The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 1995
Filed:
Jan. 31, 1994
Thomas L Andrews, Jr, Ward, CO (US);
Gary E Counts, Arvada, CO (US);
Integral Peripherals, Inc., Boulder, CO (US);
Abstract
A silent seek servo controller is used in a low profile miniature disk drive to minimize acoustic noise and the problems associated therewith. The silent seek servo controller of this invention reduces acoustic noise generation at the expense of seek performance. Since the silent seek servo controller of this invention minimizes acoustic noise, the controller helps to eliminate vibrations within the computer. The silent seek servo controller is a one mode continuous position servo seek controller that accelerates and decelerates the actuator using a smooth, continuous and completely symmetric acceleration trajectory. Specifically, for a seek time t, the disk drive actuator is accelerated for one-half the seek time, i.e, time t/2, and decelerated for the other half of seek time t. The peak acceleration occurs at time t/4 and the peak deceleration occurs at time 3t/4. The symmetry of each acceleration phase assures that any acoustic noise generated by uneven acceleration is eliminated.