Current Mirror with M2 Operating in the Active Region

Assume that M2 has a voltage across the drain-source of $0.1 V_{d s}(\mathrm{sat})$. Design the $W_2 / L_2$ ratio so that $I_1=I_2=100 \mu \mathrm{~A}$ if $W_1 / L_1=10$. Find the value of $I_2$ if M 2 is saturated.

\begin{tabular}{|l|l|l|l|l|}

\hline \multirow[b]{2}{*}{Parameter Symbol} & \multirow[b]{2}{*}{Parameter Description} & \multicolumn{2}{|c|}{Typical Parameter Value} & \multirow[b]{2}{*}{Units} \\

\hline & & n-Channel & p-Channel & \\

\hline $V_{T 0}$ & Threshold voltage ( $V_{B S}=0$ ) & $0.7 \pm 0.15$ & $-0.7 \pm 0.15$ & V \\

\hline $K^{\prime}$ & Transconductance parameter (in saturation) & $110.0 \pm 10 \%$ & $50.0 \pm 10 \%$ & $\mu \mathrm{A} / \mathrm{V}^2$ \\

\hline $\gamma$ & Bulk threshold parameter & 0.4 & 0.57 & $\mathrm{V}^{1 / 2}$ \\

\hline $\lambda$ & Channel length modulation parameter & $0.04(L=1 \mu \mathrm{~m}) 0.01(L=2 \mu \mathrm{~m})$ & $0.05(L=1 \mu \mathrm{~m}) 0.01(L=2 \mu \mathrm{~m})$ & $\mathrm{V}^{-1}$ \\

\hline & & & & \\

\hline $2\left|\phi_F\right|$ & Surface potential at strong inversion & 0.7 & 0.8 & V \\

\hline

\end{tabular}