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:
Feb. 23, 1999
Filed:
Nov. 12, 1996
Applicant:
Inventors:
Reiji Mitarai, Hachioji, JP;
Hiroaki Takeishi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310316 ;
Abstract
A control device for an ultrasonic motor includes a control calculation circuit for calculating position, i.e., the rotation amount and speed of the motor, a linearization function generation circuit for receiving the output signal from the control calculation circuit and outputting the amplitude information of a stator constituting the motor and the phase difference information of two driving signals for driving the stator, and a driving circuit responsive to the output signal from the generation circuit to supply the driving signals to the stator.