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Voltage Control Oscillator with Automatic Trace-Frequency-Wa

2016-08-24 03:46  
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Voltage Control Oscillator with Automatic Trace-Frequency-Way Composed of MC34025P
The picture shows the voltage control oscillator with automatic trace-frequency-way composed of MC34025P. The circuit can be used as voltage control oscillator with automatic trace-frequency-way in ultrasonic oscillator. The output circuit of the ultrasonic oscillator is half-bridge way, so the power integrated circuit uses MC34025P which is two-phase output. MC34025P has a wide oscillation frequency which is between 15 to 50KHZ. The center frequency is set by RP1, RP2. RP3 sets duty ratio which can prevent the push-pull switch circuit's two transistors from being connected at the same time.