The self-excited ultrasonic circuit board does not require a special oscillator and a starting circuit. The high-power switch tube acts as an oscillator tube. The ultrasonic transducer itself is a capacitive element, and a series resonant circuit is formed by adding inductance. After the power is turned on, the self-excited circuit has no signal source. It integrates the oscillation, power amplifier, output transformer and transducer to form a closed loop loop. When the loop meets the amplitude and phase feedback conditions, it forms an oscillator with power amplification. And resonates on the mechanical resonance frequency of the transducer.

1200W Ultrasound Ultrasonic Generator PCB Assembly With Cleaning Transducer For Ultrasound Dishwasher