I am working with ultrasound sensors optimized for 3.5 MHz signals, and I want to test these using my PicoScope 5000 with integrated signal generator. The PicoScope is able to generate arbitrary square waves with an amplitude of max +-2V, and I would like some circuit to be placed between the PicoScope output and sensor which amplifies the square wave to +-60V or more.
The ultrasound sensor has an impedance of approximately 41 ohm, and is connected in parallel with a TX810 evaluation board used as a T/R switch.
The square wave pulse needs to be from 4 to 8 periods long, and it will be repeated approximately every 70ms.
I've been experimenting with Microchips MD1213DB1 evaluation board, but find that it is not a perfect match as it requires a phase shifted square wave and an Output enable signal in addition to the original square wave. Since the PicoScope only has one output (being the square wave) this became difficult to implement. Also, I just fried my MD1213DB1 board and I'm hoping that I don't have to order a new one.
Is there a cheaper and easier way to achieve the pulse amplification?
I want to test how the ultrasound sensor performs using square waves compared to gaussian sinusoidal waves. I have already tested using sinusoidal waves at +-60V, by amplifying them through ADA4870 and PA107 evaluation boards. My hope is that transmitting square waves will result in an equally good result, enabling us to design a simpler pulser circuit for the final product instead of constructing the expensive sinusoidal variant using DAC and amplifiers.
I was thinking if there were some digital / pulser solution in which the original square wave might be used to open / close some MOSFET transistors, consequentially creating a higher voltage square wave on their output.