The op amp in the circuit shown in (Figure 1) is ideal. The adjustable resistor R? has a maximum value of 120 k?, and ? is restricted to the range of 0.25???0.8. Take vg = 36 mV.
1) Calculate the minimum value of vo.
2) Calculate the maximum value of vo.
3) If ? is not restricted, at what value of ? will the op amp saturate?