Drive circuit for an ultrasonic motor having noise cancellation

Details Drive circuit for an ultrasonic motor having noise cancellation Drive circuit for an ultrasonic motor having noise cancellation

1993-12-07

1995-12-12

Wysocki, Jonathan

Electricity: motive power systems

Nonmagnetic motor

310316, H02P 500, H01L 4108

Patent

active

054752884

ABSTRACT:
A drive circuit for driving an ultrasonic motor which maintains frequencies of drive signals for the ultrasonic motor within a drive frequency band. Generation of audible sound is thereby prevented. Further, it is possible to drive an ultrasonic motor in which irregularity of a waveform of a detection signal does not occur in an audible sound generating band.

REFERENCES:
patent: 4998048 (1991-03-01), Furutsu
patent: 5061882 (1991-10-01), Takagi
patent: 5153486 (1992-10-01), Hirotomi
patent: 5159223 (1992-10-01), Suganuma
patent: 5165047 (1992-11-01), Shimizu
patent: 5173631 (1992-12-01), Suguanuma
patent: 5233274 (1993-08-01), Honda et al.
patent: 5376855 (1994-12-01), Sugunuma

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