An active-cascode gain stage is shown in Fig. 8.54. Assume the amplifier A₁has a voltage gain a = 1 × 10³and infinite input impedance. For the transistors, k€™_n= 140 µA/V², V_ov= 0.3 V, γ = 0, and λ_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:

Transcribed Image Text:

Vpp 100 μΑ VBIAS π M2 A1 νο M1 V; 4ο