TWO-PORT NETWORKS
In many situations one is not interested in the internal organization of a
network. A description relating input and output variables may be sufficient
A two-port model is a description of a network that relates voltages and  currents
at two pairs of terminals
Admittance parameters
Impedance parameters
Hybrid parameters
Transmission parameters
LEARNING GOALS
Study the basic types of two-port models
Understand how to convert one model into another