View source for What is G and what is H? What is the difference in the way they are defined?

Both <math>G(s)\,</math> and <math>H(s)\,</math> are notations for transfer functions. Sometimes we use <math>G(i\omega)\,</math> (or <math>H(i\omega)\,</math>) to refer to the "frequency response" if the system is asymptotically stable; it can be obtained by evaluating <math>G(s)\,</math> at <math>s=i\omega\,</math>.

--Shuo

[[Category: CDS 101/110 FAQ - Lecture 6-1]]
[[Category: CDS 101/110 FAQ - Lecture 6-1, Fall 2008]]