D 8.65 Design the cascode amplifier of Fig. 8.30(a) to obtain gm1 = 2 mA/V and Ro = 200 k. Use a 0.18-μm technology for which V tn = 0.5 V, VA = 5 V/μm, and kn = 400 μA/V2. Determine L, W/L, VG2, and I. Use identical transistors operated at VOV = 0.25 V, and design for the maximum possible negative signal swing at the output. What is the value of the minimum permitted output voltage?