Repeat Problem 7.14 using a NMOS transistor in place of the bipolar transistor. Use I_D= 0.5mA and the transistor data in Problem 7.2.

Data from Prob. 7.14:

The ac schematic of a common-emitter stage is shown in Fig. 7.2a. Calculate the low-frequency small-signal voltage gain Ï…_o/Ï…_i and use the zerovalue time-constant method to estimate the ˆ’3-dB frequency for R_S = 10 kΩ and R_L = 5 kΩ. Data: β = 200, f_T = 600 MHz (at I_C = 1mA), C_μ = 0.2 pF, C_je = 2 pF, C_cs = 1 pF, r_b = 0, r_o = ˆž, and I_C = 1 mA.

Fig. 7.2 a:

Data from Prob. 7.2:

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.

Transcribed Image Text:

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