An active cascode gain stage is shown in Fig 8 54 Assume the amplifier A 1 has a voltage gain a 1 Atilde 10 3 and infinite input impedance For the transistors, k n 140 micro A V 2 , V ov 0 3 V, Icirc sup3 0, and Icirc raquo n 0 03 V 1 Assume all transistors are active Calculate the output resistance using Blackmans impedance formula Then calculate the voltage gain Iuml o Iuml i Fig 8 54 Vpp 100 VBIAS M2 A1 M1 V 4

Question: An active-cascode gain stage is shown in Fig. 8.54. Assume the amplifier A 1 has a voltage gain a = 1 Ã 10 3 and

An active-cascode gain stage is shown in Fig. 8.54. Assume the amplifier A₁has a voltage gain a = 1 Ã— 10³and infinite input impedance. For the transistors, k€™_n= 140 µA/V², V_ov= 0.3 V, Î³ = 0, and Î»_n= 0.03 V^ˆ’1. Assume all transistors are active. Calculate the output resistance using Blackman€™s impedance formula. Then calculate the voltage gain Ï…_o/Ï…_i.

Fig. 8.54:

Vpp 100 μΑ VBIAS π M2 A1 νο M1 V; 4ο

Vpp 100 VBIAS M2 A1 M1 V; 4

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