Can anyone tell me why the twin T oscillator is supposed to oscillate? As I see it here, the op amp is set up as a comparator and an integrator.
I see the noninverting input as the bias point, meaning, that if the + input is higher voltage than the inverting input, the output will be high. So, here, unless the button is pushed down the inputs are equal, as the output puts out a voltage equal to the + input.
But, I cannot see what causes this circuit to oscillate (as it does in real life). Any hints?
