Problem 3.3: In a particular cascoded current mirror, such as that sho

Question

Notify Me Bookmark

Problem 3.3: In a particular cascoded current mirror, such as that shown in Fig. 3, all transistors have VTN = 0.6 V, kn′ = 200 μA/V2, L = 1 μm, and λ = 0.05 V−1. Width W1 = W3 = 2 μm, and W2 = W4 = 40 μm. The reference current IREF = 25 μA a) What output current results? b) What are the voltages at the gates of M2 and M4 ? c) What is the lowest voltage at the output for which current-source operation is possible? d) What are the values of gm and r0 of M2 and M4 ? e) What is the output resistance of the mirror?

Image text

Problem 3.3: In a particular cascoded current mirror, such as that shown in Fig. 3, all transistors have

V_{T N} = 0.6 V

,

k_{n}^{'} = 200 μ A / V^{2}, L = 1 μ m

, and

λ = 0.05 V^{- 1}

. Width

W_{1} = W_{3} = 2 μ m

, and

W_{2} = W_{4} = 40 μ m

. The reference current

I_{R E F} = 25 μ A

a) What output current results? b) What are the voltages at the gates of

M_{2}

and

M_{4}

? c) What is the lowest voltage at the output for which current-source operation is possible? d) What are the values of

g_{m}

and

r_{0}

of

M_{2}

and

M_{4}

? e) What is the output resistance of the mirror?

Detailed Answer

Ask Your Doubt Rate This Answer Request Video Solution

Previous question

Next question

Submit Questions

Similar/Related Questions

Solution

Solution

Solution