Op Amp Bandwidth

Enter the following: R1, K, fu and select Config. Then click on "Get _BW".

 1. The Bandwidth (fc) is sinply the Unity-Gain Frequency (fu)
      reduced by the Noise Gain (Kn):
            fc = fu / Kn
            where Kn = (R1+R2)/R1 for either config
2. For the same gain, you get more bandwidth from the Non-Inverting amplifier.
    Compare bandwidths for K=1,2,... for both configs..
    The effect is less pronounced at higher gains.

Schematic non-inverting config inverting config
Config Non-Inverting Inverting


R1 (ohms) Gain Resistor 1
K=Vout/Vin Knon = (R1+R2)/R1, Kinv = -R2/R1
fu (Hz) Unity Gain Bandwidth of Op Amp
R2 (Ohms) R2non = R1*(K-1),  R2inv = R1*K
Kn (V/V) Noise Gain K = (R1+R2)/R1
fc (Hz) Bandwidth fc=fu/Kn