The design and principle of pulsed ultrasonic source for ultrasonic bio-effect

Ultrasonic bio-effect is still in the air and the pulsed ultrasonic source is absent for a long time. In this paper, the main theory of DDS and the working principles of AD9850 are described at first, and then the generating circuit of a pulsed ultrasonic scanning waveform based on two AD9850s is introduced. The circuit can not only simulate various pulsed ultrasonic waveforms used in clinic, but also generate ultrasonic scanning waveform with any frequency. The pulsed ultrasonic source can be a useful tool for the research of ultrasonic bio-effect.