- Joined Oct 7, 2015
I have LTSpice simulation of RLC plus OpAmp circuit as shown in the diagram. I was aiming to build a transfer function (voltage to voltage) of the following kind:
G(s) = -1/(L*C*s^2 + R*C*s + 1)
with resonance frequency at
f= 1/(2*pi*(L*C)^(1/2)) = 1/(2*pi*(7.5uH*15pF)^(1/2)) = 15MHz
However I get resonance at around 20MHz.
What could be the problem with my implementation which leads to 20MHz instead of 15MHz?