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Need a Wave Shaping Circuit

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IndiJones

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I have a square wave input signal filled with noise. After filtering out the noise, the signal becomes a sine wave. How can I reshape the sine wave back to the original square wave? Any schematic would be very helpful.
 

Alexg

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Just use a Schmitt-Trigger and you will have your square-wave back.

Best regards,
Alexg
 

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