Question

Consider a discrete-circuit common-source MOSFET amplifier with two coupling capacitors $C_{C1}$ and $C_{C2}$ and a bypass capacitor $C_S$ given by Figure 1. Use its small-signal equivalent model (ignore $r_o$) to answer the following questions: 1) (6 points) Derive the transfer function $V_o(s)/V_{sig}(s)$. 2) (2 points) Find the maximum voltage gain. 3) (2 points) Assume that frac{1}{C_{C1}(R_{sig} + R_G)} < frac{1}{C_{C2}(R_D + R_L)} < frac{g_m + 1/R_S}{C_S} Find the 3-dB frequency. 4) (4 points) Assume that (1) holds. Sketch the magnitude plot of its low-frequency response, clearly label the slope for each approximate part in terms of dB/decade.

          Consider a discrete-circuit common-source MOSFET amplifier with two coupling capacitors $C_{C1}$ and $C_{C2}$ and a bypass capacitor $C_S$ given by Figure 1. Use its small-signal equivalent model (ignore $r_o$) to answer the following questions:

1) (6 points) Derive the transfer function $V_o(s)/V_{sig}(s)$.
2) (2 points) Find the maximum voltage gain.
3) (2 points) Assume that
frac{1}{C_{C1}(R_{sig} + R_G)} < frac{1}{C_{C2}(R_D + R_L)} < frac{g_m + 1/R_S}{C_S}
Find the 3-dB frequency.

4) (4 points) Assume that (1) holds. Sketch the magnitude plot of its low-frequency response, clearly label the slope for each approximate part in terms of dB/decade.

$Consider a discrete-circuit common-source MOSFET amplifier with two coupling capacitors CC1 and CC2 and a bypass capacitor CS given by Figure 1. Use its small-signal equivalent model (ignore ro) to answer the following questions: 1) (6 points) Derive the transfer function Vo(s)/Vsig(s). 2) (2 points) Find the maximum voltage gain. 3) (2 points) Assume that frac1CC1(Rsig + RG) < frac1CC2(RD + RL) < fracgm + 1/RSCS Find the 3-dB frequency. 4) (4 points) Assume that (1) holds. Sketch the magnitude plot of its low-frequency response, clearly label the slope for each approximate part in terms of dB/decade.$

Added by Claudia S.

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