Bode Plots Overview
Bode plots are a very useful way to represent the gain and phase of a system
as a function of frequency. This is referred to as the frequency domain behavior
of a system. This web page attempts to demystify the process. The various
parts are more-or-less stand alone, so if you want to skip one or more, that should
not be a problem. If you are only interested in a quick lesson on how to make
Bode diagrams, go to part 4, "Making Plots."
A MatLab program to make piecewise linear Bode plots is described in
The documents are:
- What is the frequency domain response?
In other words, "What does a Bode Plot represent?"
- Why is the Bode representation used? There
are many ways to represent frequency response. Why are magnitude and phase
plots used? This includes some animations.
- How are the piecewise linear asymptotic approximations
- Rules for making Bode plots. This is
a quick "How to" lesson for drawing Bode plots.
- Some examples (1,
6) - (combined
into one file).
- BodePlotGui: A software tool for generating
asymptotic Bode plots.
- A MatLab program for making semi-logarithmic paper
for drawing your own Bode plots.
- A table summarizing Bode rules
- The MATLAB files discussed in these documents.
Also available is a compilation of
items 1 through 8, for easy printing.