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The cascade current source shown below must be designed for a bias current of 1 mA. Assume unCox = 100 uA/V2 and VTH = 0.4V. (a) Neglecting channel-length modulation, compute the required value of Vb2. What is the minimum tolerable value of Vb1 if M2 must remain in saturation? (b) Assuming lambda = 0.1 V-1, calculate the output impedance of the circuit. Show all your work along with the small-signal equivalent circuit.

The cascade current source shown below must be designed for a bias current of 1 mA. Assume unCox = 100 uA/V2 and VTH = 0.4V. (a) Neglecting channel-length modulation, compute the required value of Vb2. What is the minimum tolerable value of Vb1 if M2 must remain in saturation? (b) Assuming lambda = 0.1 V-1, calculate the output impedance of the circuit. Show all your work along with the small-signal equivalent circuit.

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The cascade current source shown below must be designed for a bias current of 1 mA. Assume unCox = 100 uA/V2 and VTH = 0.4V. (a) Neglecting channel-length modulation, compute the required value of Vb2. What is the minimum tolerable value of Vb1 if M2 must remain in saturation? (b) Assuming lambda = 0.1 V-1, calculate the output impedance of the circuit. Show all your work along with the small-signal equivalent circuit.

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