Problem:
1. Consider the current-mirror circuit of Figure with two transistors having equal channel lengths but with Q2: having a width five times that of Q1:
If IREF is 20 μA and the transistors are operating at an overdrive voltage of 0.2 V, what IO results? What is the minimum allowable value of VO for proper operation of the current source? If Vt = 0.5 V, at what value of VO will the nominal value of IO be obtained? If VO increases by 1 V, what is the corresponding increase in IO? Let VA = 20 V /
2. For the current-steering circuit of Figure, find IO in terms of IREF and device W/L ratios
