For the given Widlar current mirror circuit, IREF = 120 A. Transistor parameters are VA= , Vr= 26 mV and Is = Is2 = 2 x 10-16 A. Since current gain (B) values of transistors are very high, base currents will be neglected. According to that: a) Calculate VBE1 b) Calculate VBE2 and RE in case output eurrent (Io) is 50 A. IREF + c) This circuit is redesigned with new transistors having parameters of VA = 100 V, B1= B2= 150, VT = 26 mV, Is = Is2 (This value is different than 2 x 10-16 A), VBEI = 0,7 and REresistor whose value is Vc2 VBEI VBE2 different than that of in (b). In this new design, it is measured that IREF = 0,7 mA and Io= 25 A when Vc2= 1 V. Calculate the difference in output current Io when Vc2= 4 V. V- ww