US 2019/0336112 A1Published application

Power supply

AssigneeOlympus Corporation

InventorShunsuke MATSUI

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Abstract

A power supply connected to an ultrasonic treatment instrument. The power supply includes an oscillator, a field programmable gate array (FPGA), and a drive circuit. The oscillator generates a basic clock. The FPGA receives the basic clock generated by the oscillator. The FPGA generates a pulse width modulation (PWM) wave for driving a ultrasonic transducer based on the basic clock. The drive circuit is connected to the FPGA, and digitally amplifies the PWM wave to output the amplified PWM wave. The FPGA outputs the PWM wave when an output signal for driving the ultrasonic treatment instrument is input, and the PWM wave is modulated by comparing a value of first data representing a sine wave in constant current control with a value of second data representing a reference wave. The FPGA outputs a rectangular wave with a predetermined duty ratio when the output signal is not input.

Claims10

Dependent claims

A power supply connected to an ultrasonic treatment instrument including an ultrasonic transducer, the power supply comprising:

an oscillator configured to generate a basic clock;
a field programmable gate array (FPGA) configured to receive the basic clock generated by the oscillator and generate a pulse width modulation (PWM) wave configured to drive the ultrasonic transducer at a constant current based on the basic clock, the FPGA being configured to:
when an output signal configured to drive the ultrasonic treatment instrument is input, output the PWM wave, the PWM wave being modulated by comparing a value of first data representing a sine wave inconstant current control with a value of second data representing a reference wave, the first data being generated based on the output signal, the second data being a triangular wave generated based on a predetermined amplitude and a resolution determined according to a frequency of the basic clock, and
when the output signal is not input, output a rectangular wave with a predetermined duty ratio;
and
a drive circuit configured to be connected to the FPGA and digitally amplify the PWM wave to output an amplified PWM wave.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/514,143Filed 17 Jul 2019
Priority: 17 Jan 2017
Published: 7 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B06B 1/0215
Driving circuits: for generating pulses, e.g. bursts of oscillations, envelopes
A61B 17/22004
Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones;…
A61B 17/320068
Surgical cutting instruments: using mechanical vibrations, e.g. ultrasonic
B06B 1/0207
Making use of electrical energy: driving circuits

Family

Application16/514,143Continuation
US 12,053,799 B2Related patent
US 2019/0336112 A1This patent

From the US filing history. Foreign family members aren’t listed.

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