RC Op-Amp Sine Oscillator

240

01:52:58

Creates ~60Hz sine by passing white noise through a multi-stage low-pass filter and reamplifying. Can be built IRL with a +/- supplied op-amp (e.g. 741 or LM348) and E12 components.

Parallel component equivs:  0.2uF, 7.5kOhm, 90.9090...kOhm (A = -12.1212...)

Shake to start.  Builds slowly, but clips negligibly.

published 8 years ago

thebugger

8 years ago

The RC filter just phase shifts the output enough to cause a positive feedback. White noise has little to do with the oscillations

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