# Open-Circuit Impedance Parameters (z-parameters)

The impedance parameters represent the relation between the voltages and the currents in the two-port network.

# Short-Circuit Admittance Parameters (y-parameters)

The admittance parameters represent the relation between the currents and the voltages in the two-port network.

# Transmission Line Parameters (ABCD-parameters)

The ABCD parameters represent the relation between the input quantities and the output quantities in the two-port network. They are thus voltage-current pairs.

# Hybrid Parameters (h-parameters)

The hybrid parameters represent a mixed or hybrid relation between the voltages and the currents in the two-port network.