US Patent No: 4,277,758

Number of patents in Portfolio can not be more than 2000

Ultrasonic wave generating apparatus with voltage-controlled filter

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Abstract

The present invention deals with an ultrasonic wave generating apparatus with voltage controlled filter, comprising a phase comparator which detects a shifted value from a predetermined phase difference between a driving voltage or a driving current of an ultrasonic transducer and a vibratory velocity signal, and a voltage-controlled band-pass filter which is controlled by the output of the phase comparator and which is provided in a feedback loop from the vibratory velocity signal to an input of a driving amplifier of the ultrasonic transducer, wherein the oscillating frequency is changed while following the resonant frequency of the ultrasonic transducer, so that stable operation is materialized without developing abnormal oscillation in subresonant frequencies and permitting very small following error.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
TAGA ELECTRIC CO., LTD.TOKYO20

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mishiro, Shoji Kawasaki, JP 17 374

Cited Art

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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
ALCON MANUFACTURING, LTD. (2)
5,001,649 Linear power control for ultrasonic probe with tuned reactance 59 1988
4,970,656 Analog drive for ultrasonic probe with tunable phase angle 38 1989
 
COVIDIEN AG (2)
8,333,778 Cordless hand-held ultrasonic cautery cutting device 0 2011
8,333,779 Method of maintaining constant movement of a cutting blade of an ultrasonic waveguide 0 2011
 
CORWIN, LAURA J. (1)
4,868,445 Self tuned ultrasonic generator system having wide frequency range and high efficiency 22 1988
 
EATON CORPORATION (1)
4,469,974 Low power acoustic fuel injector drive circuit 29 1982
 
FIRMA J. EBERSPACHER, A CORP. OF THE FED. REP. OF GERMANY (1)
5,113,116 Circuit arrangement for accurately and effectively driving an ultrasonic transducer 28 1989
 
GEC-MARCONI LIMITED (1)
4,630,001 Electrical oscillators having automatic tuning arrangements 0 1985
 
GOODMARK FOODS, INC. (1)
4,480,745 Interlocking modular display rack system, component units therefor, and methods 10 1983
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (1)
4,468,581 Drive circuit for a piezoelectric resonator used in a fluidic gas angular rate sensor 11 1982
 
J. EBERSPAECHER GMBH & CO. KG (1)
5,216,338 Circuit arrangement for accurately and effectively driving an ultrasonic transducer 24 1991
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
4,853,579 Drive method for ultrasonic motor providing enhanced stability of rotation 32 1987
 
MED-INVENTIO AG (1)
4,626,728 Power generator for a piezoelectric ultra-sonic transducer 20 1986
 
NIKON CORPORATION (1)
4,812,699 Drive control device in an ultrasonic vibration motor 14 1987
 
NORTHROP GRUMMAN SYSTEMS CORPORATION (1)
5,656,779 Apparatus and method for producing structural and acoustic vibrations 8 1995
 
ORTHOSENSOR (1)
8,324,975 Propagation tuned oscillator for orthopedic parameter measurement 0 2010
 
ROCKWELL INTERNATIONAL CORPORATION (1)
4,891,611 Vibration compensated crystal oscillator 12 1989
 
SEIKO INSTRUMENTS INC. (1)
6,570,294 Ultrasonic motor and ultrasonic motor-equipped electronic appliance 3 1999
 
SONO-TEK CORPORATION (1)
4,642,581 Ultrasonic transducer drive circuit 42 1985
 
SPARTON CORPORATION (1)
4,709,360 Hydrophone transducer with negative feedback system 5 1985
 
SURGITEK CORPORATION, A CORP OF (1)
4,445,063 Energizing circuit for ultrasonic transducer 41 1982
 
VEB CHEMIEANLAGENBAUKOMBINAT LEIPZIG/GRIMMA (1)
4,709,182 Method and apparatus for tightening or loosening screw-type connections 8 1986
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
4,703,213 Device to operate a piezoelectric ultrasonic transducer 26 1986
4,801,837 Piezoelectric load measurement apparatus and circuits 2 1987