D 8.64 For a cascode current source such as that in Fig. 8.30, show that if the two transistors are identical, the current I supplied by the current source and the output resistance R. are related by IR, = 2 y.P/\Vov). Now consider the case of transistors that have v.] = 3 V and are operated at |Vorl of 0.15 V. Also, let „Cox = 100 mA/V?. Find the WIL ratios required and the output resistance realized for the two cases: (a) I = 50 u A and (b) I = 200 u A. Assume that Vy for the two devices is the minimum required (i.e., | Vov]).