Well Thanks for all inputs,
I do not want to practically do so, Just want to know if it is possible to extract any sine wave in the output of the above circuit without adding any other components?
y professor wanted me to design a sine wave generator using op-amps, I just designed the above, but finally I noticed that the out put is square before the output filter, and ramp after the output low pass filter.
Any idea how to use this circuit to be able to get an sine output without or wit minimum component changes?