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 "Making Plots."  A MATLAB program to make piecewise linear Bode plots is described in BodePlotGui.

The documents are:

  1. What is the frequency domain response?  In other words, "What does a Bode Plot represent?" This includes an animation.
  2. How are the piecewise linear asymptotic approximations derived?
  3. Rules for making Bode plots.  This is a quick "How to" lesson for drawing Bode plots.
  4. Some examples (1, 2, 3, 4, 5, 6) - (combined into one file).
  5. BodePlotGui:  A software tool for generating asymptotic Bode plots.
  6. A MatLab program for making semi-logarithmic paper for drawing your own Bode plots.
  7. A table summarizing Bode rules
  8. The MATLAB files discussed in these documents.

    Also available is a compilation of items 1 through 8, for easy printing.


© Copyright 2005 to 2019 Erik Cheever    This page may be freely used for educational purposes.

Erik Cheever       Department of Engineering         Swarthmore College