Sine wave signal source circuit diagram with stable output

Published:2011/8/10 6:50:00 Author:nelly | Keyword: Sine wave, signal source, stable output | From:SeekIC

As shown in the figure, it is the sine wave signal source with stable output. Firstly, using the primary operational amplifier comparator, and it produces a 60Hz constant amplitude square wave. The comparator's output terminal has a pair of 6.2V zener diodes which is connected back-to-back . The next is the two-stage Sallen-key type low pass filter, it can filter all the harmonic. The capacitance coupling amplifier separates the DC component which is produced by the unequal zener voltage in the limiter circuit, then it can compensate the filter's loss, and it accurately calibrates the output amplitude to 10V peak value.



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