Chapter 10, Problem 10.46P

Consider the basic two-transistor NMOS current source in Figure 10.16.The circuit parameters are $V^{+}=+5,V^{-}=-5V$ , and $I_{REF}=250\mu A$ .The transistor parameters are $V_{TN}=1V,{K^{\prime }}_n=80\mu A/V^2$ , and $\lambda =0.02V^{-1}$ . (a) For ${\left(W/L\right)}_1={\left(W/L\right)}_2=3$ , find $I_O$ for (i) $V_{DS2}=3V$ ,(ii) $V_{DS2}=4.5V$ , and (iii) $V_{DS2}=6V$ . (b) Repeat part (a) for ${\left(W/L\right)}_1=3$ and ${\left(W/L\right)}_2=4.5$ .