Here is the ultrasonic generator circuit I'm trying to understand:
It is powered by USB and it produces 100V at 100kHz on the piezoelectric speaker
Two mutually inverted PWM signals go from the micro-controller to the transformer
1) Is this the simplest, cheapest circuit of the ultrasonic generator with similar output?
2) Why do we need
3) Center tapped transformer
T1 is used here, but is it ok to replace
T1 with a transformer without center tap and to use single PWM signal as input?
5) If I'm powering the circuit from a separate power supply which is able to deliver several amps do I need