Wien Bridge Sine Wave Oscillator Circuit

Published:2011/4/24 20:49:00 Author:Sue | Keyword: Wien Bridge, Sine Wave, Oscillator | From:SeekIC

As seen in the figure, the oscillator frequency is around 1kHz, and the circuit uses stabilivolt 2DW78 to stablise the voltage. If we replace the coaxial potentiometer with 1.5kΩ resistance, and connect different resistances with multiband switch,then the output signal frequency can be adjusted continuously. And the maximum oscillator frequncy is decided by frequency characteristics of operational amplifier F007.In low frequency part there should be large resistance and capacitor, but large capacitor can result in unstability or leakage of electricity, so the input impedance of operational amplifier should be as large as possible.



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