Low frequency Wien bridge sine wave oscillator(MC1456、μA741)circuit diagram

Published:2011/8/10 4:59:00 Author:nelly | Keyword: Wien bridge, sine wave, oscillator | From:SeekIC

As shown in the figure, it is the low frequency Wien bridge sine wave oscillator circuit. This circuit adopts diode's index-number characteristic to stabilize the amplitude of 0.001Hz sine wave generator, then it has not large time constant, because the diode can quickly change their equivalent dynamic resistance. This stable circuit is similar to the limiter. The 47KΩ resistance which is in series with diode is used to decrease the diode's amplitude limit, and it can prevent circuit distortion. In general Wien bridge oscillator, due to the influence of operational amplifier's limited input impedance.



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