I'm trying to build an ultrasonic transmitter circuit. The datasheet specifies 20V peak-peak for the ultrasonic to operate at its maximum power. However I'm limited to only using a 9V supply. What I thought about doing is making an H-Bridge to switch the polarity of the battery between 9 and -9, giving me almost 18vpp. Do you think this is a good idea? Do you have anything else to recommend?
Ultrasonic emission sources somewhat behave and work the same way as speakers or buzzers. Using a [-Vcc to Vcc] range (with a H-Bridge) is a common practice in class D audio amplifiers to double the peak-peak voltage across the membrane. So that's all right!