The circuit of Fig. P1.75 is a negative voltage reference because it accepts a negative voltage VI to yield a negative voltage VO. Moreover, the load is modeled with a Norton equivalent. Let the diode...

The circuit of Fig. P1.75 is a negative voltage reference because it accepts a negative voltage VI to yield a negative voltage VO. Moreover, the load is modeled with a Norton equivalent. Let the diode have rz 5 10 V and VZ 5 6.2 V at IZ 5 20 mA.

(a)Assuming VI 5 2(15 6 3) V, 2 kV # RL # 3 kV, and 0 # IL # 4 mA, specify a 5% standard resistance R for a guaranteed diode current of 3 mA. (b) What is the line regulation (in mV/V) and the load regulation (in mV/mA) of your circuit? Be careful with the polarity of the load regulation! (c) Estimate VO(max) and VO(min).