Bubba Oscillator - Smooth sine curve generation

Published: 4/10/2017
Bubba Oscillator - Smooth sine curve generation
Source: ELECTRONICS.STACKEXCHANGE.COM

I am trying to simulate Bubba Oscillator using MATLAB, so far i have had success getting both sinusoidal and cosine curves from below circuit : I have used finite gain op-amp with gain = 100000; and rest of the values are marked in the circuit. The results that i got were : My questions are : 1.) How can i make the graphs more smoothers, instead of that peaky shape that they follow? 2.) How can i

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