4.81 Let the FETs of the basic mirror of Fig. 4.58a have k-4k, – 2 mA/V’, Vio 0.4 V and A -1/(15 V) (a) If i, 50 μΑ, obtain an expression for 10 as a function of vo. Hence, find v, R, Ro, and the lower limit of the linear output range. What is the percentage change in io for O(min)’ each 1-V change in vo above vo(min)? (b) Repeat, but after adding a second FET pair M3-M4 to turn the circuit into a cascode mirror of type of Fig. 4.59b. Assume k,k2-4k,- 4k, = 2 mA/V, γ = 0.5 V1/2, and 129, 0.6 V. Compare with part (a), and comment

image 375 - 4.81 Let the FETs of the basic mirror of Fig. 4.58a have k-4k, - 2 mA/V', Vio 0.4 V and A -1/(15 V) (a) If i, 50 μΑ, obtain an expression for 10 as a function of vo. Hence, find v, R, Ro, and the lower limit of the linear output range. What is the percentage change in io for O(min)' each 1-V change in vo above vo(min)? (b) Repeat, but after adding a second FET pair M3-M4 to turn the circuit into a cascode mirror of type of Fig. 4.59b. Assume k,k2-4k,- 4k, = 2 mA/V, γ = 0.5 V1/2, and 129, 0.6 V. Compare with part (a), and commentimage 377 - 4.81 Let the FETs of the basic mirror of Fig. 4.58a have k-4k, - 2 mA/V', Vio 0.4 V and A -1/(15 V) (a) If i, 50 μΑ, obtain an expression for 10 as a function of vo. Hence, find v, R, Ro, and the lower limit of the linear output range. What is the percentage change in io for O(min)' each 1-V change in vo above vo(min)? (b) Repeat, but after adding a second FET pair M3-M4 to turn the circuit into a cascode mirror of type of Fig. 4.59b. Assume k,k2-4k,- 4k, = 2 mA/V, γ = 0.5 V1/2, and 129, 0.6 V. Compare with part (a), and comment

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images - 4.81 Let the FETs of the basic mirror of Fig. 4.58a have k-4k, - 2 mA/V', Vio 0.4 V and A -1/(15 V) (a) If i, 50 μΑ, obtain an expression for 10 as a function of vo. Hence, find v, R, Ro, and the lower limit of the linear output range. What is the percentage change in io for O(min)' each 1-V change in vo above vo(min)? (b) Repeat, but after adding a second FET pair M3-M4 to turn the circuit into a cascode mirror of type of Fig. 4.59b. Assume k,k2-4k,- 4k, = 2 mA/V, γ = 0.5 V1/2, and 129, 0.6 V. Compare with part (a), and comment

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