Merge branch '05-note' into 'main'

just a comment

See merge request !9

05_pn_junction_bias.tex

@@ -63,7 +63,7 @@ So as a function of the bias voltage, we get
     \end{split}
 \end{equation}
 
-In a strongly asymmetric junction $p^+n$
+In a strongly asymmetric junction $p^+n$ ($N_a\gg N_d$)
 \begin{equation}
     \frac{1}{C_j^2} \approx \frac{2(\phi_B-V)}{q\varepsilon N_d}
 \end{equation}