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Building a Wien Bridge Oscillator in LTspice: Watching a Sine Wave Born from Noise

The Idea An oscillator is a circuit that produces a signal without being given one. The Wien bridge is one of the classic ways to get a clean sine wave from an op-amp, a handful of resistors, and two…

  • Wien bridge oscillator generates sine wave from noise
  • Positive feedback network allows oscillation at ~1 kHz
  • Negative feedback network sets amplifier gain at ~3.2

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