(a) Use the Miller approximation to calculate the 3-dB frequency of the small-signal voltage gain of a common-emitter transistor stage as shown in Fig. 7.2a

(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. 7.2a:

RL Vo Rs Vi