Basic Integrator
F=1 /(2πRC)
Here R=1Kohm
C=0.1uF
So, F=1.591KHz
When input frequency = F then gain is unity and zero in decibel
At input frequency less than F then gain in dB is positive.
At input frequency greater than F then gain in dB is negative.
At input frequency =0 then gain is very high and almost equal to 2000dB
Gain = F / (input frequency)
Gain in decibel = 20*log(gain)
