Impedance Parameters

Impedance or z parameters are defined by

$\begin{displaymath}\left( \begin{array}{c} v_1 \\ v_2 \end{array} \right) = \l... ...ght) \left( \begin{array}{c} i_1 \\ i_2 \end{array} \right) . \end{displaymath}$

(67)

The matrix is called an impedance matrix, since it relates a vector of voltages to a vector of currents, as in Ohm's law.

A circuit representation is shown in Figure 56.

**Figure 56:** Impedance parameter model.
$\begin{figure} \begin{center} \epsfig{file=images/tpnimg3.eps}\end{center}\end{figure}$

ANU Engineering - ENGN2211