I have referred calculations at below link but the calculations & frequencies do not match as per the above schematic.Thanks for your reply.
I understand the theory, but similar to comparator can you please tell integrator calculations.
Because I need to change the frequency from 300KHz to 100KHz , so that calculations will help me to find component values.
The relationship is fairly simple, a step input to an integrator results in
a ramp .
So we have Q = C x V, I = C x dV/dT or dT = (C x dV)/ I
Because of virtual ground at OpAmp I = Vcomparator / R. So you have two
dT's, the ramp up and the ramp down to compute, Vcomparator is the trip
point of the comparator.
Without schematic and integrator calculations:
What happens if you increase the capacitor by a factor of 3?
Since 300kHz/100kHz = 3
Just as simple approach.