Hybridparameter

$$\begin{eqnarray*}h_{11} & = & \frac{\Delta U_{BE}}{\Delta I_B} = \frac{0,16 (1 \... ...5,7 V}\\ \\ & = & 1,72 \cdot 10^{-4} (1 \pm 20 \%) \Omega^{-1} \end{eqnarray*}$$