Low power consumption wien bridge oscillator circuit diagram composed of MC1454

Published:2011/9/14 9:15:00 Author:nelly | Keyword: wien bridge oscillator | From:SeekIC

As shown in the figure, it is a low power consumption wien bridge oscillator circuit. When it drives low impedance and large capacitance loads, the distortion is small. The used operational amplifier can drive 8~10Ω loads, it can provide 2~4V peak value outout voltage, the frequency ranges from 1Hz to 100KHz, the distortion is lower than 0.5%. The automatic gain control is realized by bulb L, because the bulb's resistance changes in relation to the output voltage. The negative feedback circuit is composed of resistance R3, then it can determine the output signal amplitude.



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