Systems Analysis
A system is characterised by its input and output relationships, as shown in Figure 1, where x(t) is the signal at the input and y(t) is the signal at the output of the system. The system can represent several things, e.g., a circuit, a chemical process, etc. We can identify the following descriptions of a system:
Linearity
Invariance over time
Memory
Causality
Stability
Figure 1: Depicting a System.