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The switching output circuit of ultrasonic oscillator

2016-08-13 13:15  
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The switching output circuit of ultrasonic oscillator
The power + U of output circuit is the DC voltage which is rectified, smoothed form the AC power. The control circuit uses +12 V power supply, therefore, it uses of transformer Tl to make the electrical isolation between low and high voltage. The inputs A and B of control circuit is the pulse voltage which is from the the 180 ° phase difference of integrated controller output, then the voltage amplified by VT1 and VT2 to drive MOSFET tubes VT5 and VT6 by passing transformer Ti. The duty cycle of VT5 and VT6 gate drive signal is approximately 45%, and the peak of gate voltage U (GS) is about lOv.