Here, U can understand the basic working of Op-Amp as simple oscillator.. Hw it can generate oscillating output signals.. hw it is amplifying input signal is shown in the circuit...
Here non-inverting configuration is used...
So and also Rf and R1 are same... So gain of amp is 2...
So from this u can also clerify that it is not always that gain is unity of oscillator... In fact.. gain around loop/feedback should be greater or equal then unity.... So that concept is also clear... Phase shift is zero because series RC produced +45° phase shift where as parallel RC produced -45° phase shift.. and non inverting configuration produces 0° phase shift... So overall phase shift is 0° which is integral multiple of 2π which is second necessary condition of oscillator...
Stay tuned for more updates on basics of Electronics...
This is vC... signing out....
