D 8.4 Sketch the p-channel counterpart of the current-source circuit of Fig. 8.1. Let the sources of Q1 and Q2 be connected to VDD. Let VDD = 1.3 V, |Vt| = 0.4 V, Q1 and Q2 be matched, and μpCox = 80 µA/V2. Find the device W/L ratios and the value of the resistor that sets the value of IREF so that a nominally 50-µA output current is obtained. The current source is required to operate for VO as high as 1.1 V. Neglect channel-length modulation.