Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Reexamination Certificate
2007-09-18
2007-09-18
Jaworski, Francis J. (Department: 3768)
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
Reexamination Certificate
active
10774914
ABSTRACT:
An ultrasonic driving apparatus consists mainly of a digital oscillatory circuit, an amplifier, a detection circuit, a phase difference detection circuit, a register, a data transfer circuit, and a switching circuit. The digital oscillatory circuit is used to drive an ultrasonic transducer at the resonance frequency of the ultrasonic transducer. The amplifier amplifies a driving signal output from the digital oscillatory circuit. The detection circuit detects the phase θv of an applied voltage and the phase θi of an induced current from the driving signal applied to the ultrasonic transducer via the amplifier. The phase difference detection circuit detects a difference between the phases θv and θi. The register holds digital frequency data with which a frequency at which the digital oscillatory circuit is oscillated is determined, and changes the digital frequency data. The data transfer circuit transfers the digital frequency data to the register. The switching circuit is interposed between the phase difference detection circuit and register.
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Honda Yoshitaka
Ono Hiroo
Sakurai Tomohisa
Takahashi Hiroyuki
Tanaka Kazue
Jaworski Francis J.
Olympus Corporation
Scully , Scott, Murphy & Presser, P.C.
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