The current amplification factor β of a BJT is very sensitive to the base width as well as to the ratio of the base doping to the emitter doping. Calculate and plot β for a p-n-p BJT with Lnp = Lpn for:
(a) nn = pp and Wb/Lnp = 0.01 to 1
(b) Wb = Lnp and nn/pp = 0.01 to 1
Neglect mobility variations (i.e. Consider μnp = μpn).
(c) Give a brief comment to your plot.