MT test_W08 (1)

# MT test_W08 (1) - Electronics II(ELEC 312 Winter 2008 class...

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Electronics –II (ELEC 312), Winter 2008 class Mid-term test (February 15, 2008) ( Time: 45 minutes Instructor: Dr. R. Raut) Student ID# Name: Q.1: Consider the basic current mirror in Figure 1. Design R , so that I o =3 mA. Given V CC =-V EE =3 Volts, β=100, I S =10 -14 Amp. Assume that the transistors are matched. Figure 1: Q.2: The MOS current mirror in Figure 2, has been designed for I D =100 μA with V o =1 Volt. How much will I D change if V o changes by 200 mV, because of a change in R L ? Given V A =20 Volts, I D = KV ov 2 , K=100 μA/V 2 , and I o =I D (1+V DG /V A ), because of channel modulation effect. V DG =V o -V G . Figure 2: Q.3: Consider the cascode amplifier in Figure 3, built with MOS transistors. Show the

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