Using the parameters given below, calculate the current through two nMOS transistors in series (see figure), when the drain of the top transistor is tied to VDD =1 V, the source of the bottom transistor is tied to Vss = 0 and their gates are tied to VDD. The substrate is also tied to Vss= 0V. Assume that W/L = 10 for both transistors.
k’= 170 μA/V2
VT0 = 0.45 V
γ = 0.5 V1/2
|2ΦF| = 1.01 V
λ = 0
Hint: The solution requires several iterations, and the body effect on threshold voltage has to be taken into account. Start with the KCL equation.
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