7.8 Design the MOS amplifier of Fig. 7.4(a) to obtain maximum gain while allowing for an output voltage swing of at least ±0.5 V. Let V DD = 5 V, and utilize an overdrive (a) Specify VDS at the bias point. (b) What is the gain achieved? What is the signal amplitude vˆ gs that results in the 0.5-V signal amplitude at the output? (c) If the dc bias current in the drain is to be 100 μA, what value of R D is needed? (d) If kn = 200 μA/V2, what W/L ratio is required for the MOSFET?