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There is a lot of overlap in circuits that do the same things while accomplishing different tasks. Radio, Magnetic Induction Heating, Ultrasonics; have a lot of common circuit components. You will need a Frequency Driver, MOSFET Gate Driver, Power Amp, and Speaker. Sep 21, 2011 - In order to design a driver of piezoelectric ultrasonic transducer which can. Basic circuit units including low pass filter, power amplifier, signal.

I am trying to drive a 120khz, 60W ultrasonic piezoelectric transducer. To do so I have an arduino mega2560 producing a 120khz frequency and am feeding that into the circuit to switch a TIP102 transistor. This transistor is feeding power to my transducer from a 12v power source.

I intend to connect an inductor in parralel with the Transducer as this will amplify the output but will do so at a later time. For now I am just trying to get any output at all.

So far I have been unable to get the transducer to do anything. I am basing my (very simple) driving circuit on (full image found below), a schematic posted.

My transducer is. The specs of the transducer are as follows. • Frequency 120 KHz • Power 60W • resonate frequecy: 120±1.5 KHZ • capacitance: 4000 ±10% PF • resonate impedance:=100MΩ Can someone please let me know what I am doing wrong here or what other avenues I should run down to get this working? Click to expand.D1 is there for the inductor. Inductor causes voltage spikes and I assume having those pass backwards through the circuit is less than ideal. Now for the moment I don't have an inductor but adding it later, as well as the diode will happen. Mainly to protect the transistor.

Is there not a transistor that will support switching 60watts at a high frequency like this? The most I have seen would require a higher base voltage than I am capable of having from my microcontroller. I am becoming quite sure that the transistor is just too slow.