9.89 Consider a current-mirror-loaded differential amplifier such as that shown in Fig. 9.32(a) with the bias current source implemented with the modified Wilson mirror of Fig. P9.89 with I = 200 μA. The transistors have Vt = 0.5V and kW/L = 5 mA/V2. What is the lowest value of the total power supply (VDD +VSS) that allows each transistor to operate with VDS ≥ VGS ?

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