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Scipio
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Why does this Low pass filter only acts when i attach a resistor to it?

When i put resistor R14 equal to 100ohms i get this:

enter image description here

But when i remove R14 i get this:

enter image description here

Nothing happened to MixerOut1 wave. Why did that happened?

Scipio
  • 803
  • 5
  • 9