Ultrasonic motor and ultrasonic motor-equipped electronic appliance
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United States of America Patent
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May 27, 2003
Grant Date -
N/A
app pub date -
Jun 1, 1999
filing date -
Jun 2, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention discloses an ultrasonic motor and an electronic appliance equipped with the ultrasonic motor, wherein an input signal to a control circuit which is a command signal for driving a moving body of the ultrasonic motor or a driven body driven in response to the moving body is restricted by a signal processing circuit. The frequency component of the input signal equal to or exceeding a specified frequency is cut by means of a filter circuit or an output from a control circuit is controlled in response to a fluctuation width thereof.
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