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Low distortion Wien bridge oscillator circuit diagram

2016-05-16 01:48  
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Low distortion Wien bridge oscillator circuit diagram
The oscillation principle is that when the loop phase shift amount is an integer multiple of 0 ° or 360 °, the loop gain is greater than 1, the circuit starts oscillation. If the oscillation is increased, the circuit will be saturated, therefore it needs an amplitude stabilization circuit. In the circuit, the amplitude stabilization circuit uses a junction FET (VT1) drain - source resistor to connect with R1 in series to make R2 / 2 = 4.7kΩ / 2 = 2.35kΩ.