7.25 Consider the MOSFET amplifier of Fig. 7.10 for the case Vt = 0.4 V, kn = 10 mA/V2, VGS = 0.6 V, VDD = 1.8 V, and RD = 6.8 kΩ.
(a) Find the dc quantities ID and VDS.
(b) Calculate the value of gm at the bias point.
(c) Calculate the value of the voltage gain.
(d) If the MOSFET has λ = 0.2 V−1, find ro at the bias point and calculate the voltage gain.
(a) 0.2 mA, 0.44 V; (b) 2 mA/V; (c) −13.6 V/V; (d) 25 kΩ, −10.7 V/V