As the equation above shows, the conductance is linear with current. It is difficult to control the value of K during manufacturing and it can vary considerably, but the control on n is much tighter. High and Low Resistances . This is often given in the form of a graph showing the change of high frequency resistance as a function of forward current I F . The low resistance is sometimes called the residual resistance.
PIN diodes exhibit junction capacitance just as any diode does.
Because of the wide intrinsic region though, capacitances are quite low with typical values less than 1 pF. At small reverse bias voltages the capacitance decreases, but then reaches a constant value. Given the fact that PIN diodes are intended for high frequency operation and the low junction capacitances, manufacturers take pains to reduce package inductance and capacitance, and typical values are 2 nH and 0.2 pF respectively.