I am trying to make a ultrasonic signal generator and transistor amplifier for experimenting in sonochemistry. I am a machinist by trade trying to learn electronics.
The transducer I am trying to power is a 40KH 70W unit. Here is the specifications,
http://www.steminc.com/piezo/SMBLTD45F40H.asp
I used the signal generator on my Picoscope 2203. The signal was a 40KH square wave with a 50% duty cycle.
Being new to electronics I figured a regular audio amplifier would work. I used a Sony Xploid amplifier and got little results. The transducer vibrated enough to be barely audible. Thinking I needed more power I built a 500W amp from Elliot Sound Products(project 68.) The amp worked great on music but again it didn't work on the transducer.
I have since found this site and have studied a lot about transistors and believe that I need to use IGBT transistors instead of bipolar transistors.
Could IGBT transistors be used to drive a circuit like this? Can I use a standard current mirror and differential amp for a pre-amp and use IGBT transistors for the power stage?
Is a square wave the normal signal used on ultrasonic transducers and can I use a 555IC in astable mode to provide the signal or does the signal need to be a AC square wave?
Thank you for taking the time to read this post and I appreciate any help that you can offer.
JT
The transducer I am trying to power is a 40KH 70W unit. Here is the specifications,
http://www.steminc.com/piezo/SMBLTD45F40H.asp
I used the signal generator on my Picoscope 2203. The signal was a 40KH square wave with a 50% duty cycle.
Being new to electronics I figured a regular audio amplifier would work. I used a Sony Xploid amplifier and got little results. The transducer vibrated enough to be barely audible. Thinking I needed more power I built a 500W amp from Elliot Sound Products(project 68.) The amp worked great on music but again it didn't work on the transducer.
I have since found this site and have studied a lot about transistors and believe that I need to use IGBT transistors instead of bipolar transistors.
Could IGBT transistors be used to drive a circuit like this? Can I use a standard current mirror and differential amp for a pre-amp and use IGBT transistors for the power stage?
Is a square wave the normal signal used on ultrasonic transducers and can I use a 555IC in astable mode to provide the signal or does the signal need to be a AC square wave?
Thank you for taking the time to read this post and I appreciate any help that you can offer.
JT