Numerical Issue Bode plot: Non-Ideal inverting integrator

[davidparent]

It seems that the smallest magnitude of a bode plot (I tried 1/(s+1) and − 1000000/(s(s+1000001)) is around 140dB ​

Here is my co-lab file: https://colab.research.google.com/drive/1NxAeozFvhL9a9gzLShMODxm5u720umVN?usp=sharing

[davidparent]

It happens in the docs too.: from matplotlib.pyplot import savefig from lcapy import *

H = 1 / (s*2 + 20s + 10000)

H.bode_plot((1, 1000))

No matter how high the frequency, it is limited to a minium of -120dB.

[mph-]

Try

H.bode_plot((1, 1000), dbmin=-140)

[davidparent]

This worked great. Sorry for the delay