(a) Use zero-value time constants to estimate the dominant pole and short-circuit time constants to estimate the nondominant pole for the common-source amplifier in Problem 7.2.

(b) Compare your answers with a SPICE simulation.

Data from Prob. 7.2:

Repeat Problem 7.1 for the MOS common source stage shown in Fig. 7.2b using R_S = 10 kΩ, R_L = 5 kΩ, I_D = 0.5 mA, and the following NMOS transistor data: NMOS: W = 100 µm, L_drwn = 2 µm, L_d = 0.2 µm, X_d = 0, λ = 0, k€™_n = 60 µA/V², γ = 0, C_sb = C_db = 0, C_ox = 0.7 fF/(µm²), and C_gd = 14 fF.

Data from Prob. 7.1:

(a) Use the Miller approximation to calculate the ˆ’3-dB frequency of the small-signal voltage gain of a common-emitter transistor stage as shown in Fig. 7.2a using R_S = 5 kΩ, R_L = 3 kΩ, and the following transistor parameters: r_b = 300 Ω, I_C = 0.5 mA, β = 200, f_T = 500 MHz (at I_C = 0.5 mA), C_μ = 0.3 pF, C_cs = 0, and V_A = ˆž.

(b) Calculate the nondominant pole magnitude for the circuit in (a). Compare your answer with a SPICE simulation.

Fig. 7.2 (b)

Transcribed Image Text:

RL Vo Rs Vi