EE 422G Notes: Chapter 6 Instructor: Cheung
6.6 Block Diagrams and Feedback Systems
What is a block diagram? Composition of modular subsystems.
Want to represent the whole system as
so that we can study its stability, frequency response, time response, etc.
Question: Can we just study them separately?
Assumption: Y(s) is determined by input X(s) and block transfer function G(s).
The output can have arbitrary fan-out and G(s) will have no effect on the input.
These assumptions might not hold in real applications. We’ll see an example later.