Self-powered Sine to Square wave Converters

  
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This circuit is intended to provide good square waves converting a sine wave picked-up from an existing generator. Its major feature consists in the fact that no power-source is needed: thus it can be simply connected between a sine wave generator and the device under test. The input sine wave feeds a voltage doubler formed by C1, C2, D1 & D2 that
Self-powered Sine to Square wave Converters - schematic

powers the IC. IC1A amplifies the input sine wave, other inverters included in IC1 squaring the signal and delivering an output square wave of equal mark/space ratio and good rise and fall times through the entire 20Hz-20KHz range.



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