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Commit a9ff8132 authored by Tim Frey's avatar Tim Frey
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...@@ -174,9 +174,9 @@ Notes: ...@@ -174,9 +174,9 @@ Notes:
\item Thinner oxide, lower $V_T$. \item Thinner oxide, lower $V_T$.
\end{enumerate} \end{enumerate}
\subsubsection{Body effect} \subsubsection{Body effect}
In the case of a non-zero $V_{SB}$, we have to add the following term to the threshold voltage (exercise session 12): In the case of a non-zero $V_{SB}$, we have to adjust the threshold voltage:
\begin{equation} \begin{equation}
V_{TH} = V_{TH0} + \gamma\left(\sqrt{|-2\phi_p + V_{SB}|} - \sqrt{|-2\phi_p|}\right) V_{TH} = V_{TH0} + \gamma\left(\sqrt{|2\phi_F + V_{SB}|} - \sqrt{|2\phi_F|}\right) \qquad \text{where}\quad \Phi_F = \frac{k T}{q} \ln\left(\frac{N_{sub}}{n_i}\right)
\end{equation} \end{equation}
\subsection{Strong inversion} \subsection{Strong inversion}
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