Chapter 16, Problem 16.5TYU

Consider the NMOS logic circuit in Figure 16.18. Assume transistor parameters of ${k^{\prime }}_n=100\mu {\text{A/V}}^{\text{2}}$ and $V_{TN}=0.4\text{V}$ . Assume all driver transistors are identical. Neglect the body effect. (a) If ${\left(W/L\right)}_L=0.5$ , determine (W/L) for the drivers such that $V_{OL}\left(\max \right)=80\mu \text{V}$ . Assume logic 1 input voltages are 2.1 V. (b) Determine the maximum power dissipation in the logic circuit. (Ans. (a) ${\left(W/L\right)}_D=15.4$ , (b) $P=255\mu \text{W}$ )

Figure 16.18 Figure for Exercise TYU 16.5