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:
Jun. 26, 1990
Filed:
Oct. 12, 1988
Yoshikiyo Konno, Saitama, JP;
Takashi Suzuki, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A control apparatus for a linear motor for driving a pickup of an information storage/readout apparatus with which the pickup can be moved more quickly and accurately to a desired target position. A slider for supporting the pickup is provided which is movable in a straight line. A magnetic circuit for forming a magnetic gap extends in the moving direction of the slider. A moving coil is mounted on the slider having at least a portion located within the magnetic gap. The voltage induced across the moving coil is detected to product a signal indicative of the velocity of the pickup. A velocity feedback loop feeds back the detected voltage to a driving source of the coil. The value of the feedback coefficient of the velocity feedback loop is set in accordance with the operating mode of the apparatus.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile