Q4. Consider the amplifier shown in Fig. Q4. The transistor M1 has Kp

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Q4. Consider the amplifier shown in Fig. Q4. The transistor M1 has Kp = 500 μA/V2, VTHP = −0.5 V and λp = 0.01 V−1. Fig. Q4 (a) What is the amplifier configuration? (b) Determine the DC drain current of M1, ID, M1 and verify the assumption used. [Ans: ID,M1 = 5.65 mA ] (c) What is the Rin for this amplifier? [Ans: Rin ≈ 120 Ω ] (d) What is the Rout for this amplifier? [ Ans: Rout ≈ 0.8 kΩ] (e) Use the concept of two-port network and the important results derived in the lecture notes, determine the voltage gain of this amplifier. [Ans: gain ≈ 0.27 ]

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Q4. Consider the amplifier shown in Fig. Q4. The transistor

M_{1}

has

K_{p} = 500 μ A / V^{2}, V_{T H P}

= - 0.5 V

and

λ_{p} = 0.01 V^{- 1}

. Fig. Q4 (a) What is the amplifier configuration? (b) Determine the DC drain current of

M_{1}, I_{D, M l}

and verify the assumption used. [Ans:

I_{D, M I} = 5.65 m A

] (c) What is the

R_{in}

for this amplifier? [Ans:

R_{i n} \approx 120 Ω

] (d) What is the

R_{out}

for this amplifier?

[

Ans:

R_{out} \approx 0.8 k Ω]

(e) Use the concept of two-port network and the important results derived in the lecture notes, determine the voltage gain of this amplifier. [Ans: gain