  Measurements of diode dynamic conductance and dynamic capacitance for
frequencies up to $10 \times \tau_{p,n}^{-1}$, and voltage amplitude level up
tp 100 mV was carried out with a precision impedancemeter. The results were
compared with the theoretical expressions obtained with the spectral approach
to the charge carrier transport in $p\!-\!n$-junctions. This experimental
confirmation is of practical interest, as one can use the theory to extract
device parameters, such as: relaxation time $\tau_{p,n}$, and junction
injection coefficient. These experiments were carried to test the extension of
the conventional $p\!-\!n$-junction theory.
