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QUESTION: 1

The transistor in the circuit shown below has k_{n} = 0.4 mA/V^{2}, V_{t} = 0.5 V and λ = 0. Operation at the edge of saturation is obtained when

Solution:

Use the standard formula for edge saturation.

QUESTION: 2

The PMOS transistor in the circuit shown has V_{t} = −0.7 V, μ_{p}C_{ox} = 60 μA/V^{2}, L = 0.8 μm, and λ = 0. Find the value of R in order to establish a drain current of 0.115 mA and a voltage V_{D} of 3.5 V.

Solution:

QUESTION: 3

The NMOS transistors in the circuit shown have V_{t} = 1 V, μ_{n}C_{OX} = 120 μA/V^{2}, λ = 0, and L_{1}= L_{2} = L_{3} = 1μm. Then which of the following is not the value of the width of these MOSFETs shown

Solution:

QUESTION: 4

The MOSFET shown has Vt = 1V, k_{n} = 100µA/V^{2} and λ = 0. Find the required values of W/L and of R so that when v_{I} = V_{DD} = +5 V, r_{DS} = 50 Ω, and V_{O} = 50 mV.

Solution:

QUESTION: 5

(Q.5-Q.7) For each of the circuits shown find the labeled voltages. For all transistors, k_{n}(W/L) = 1 mA/V2, V_{t} = 2V, and λ = 0

5. Find V_{3}

Solution:

V_{3} = 10- 4 * 2 + 1.4 = 3.4v.

QUESTION: 6

Find V_{4} and V_{5}

Solution:

QUESTION: 7

Find V_{1} and V_{2}

Solution:

I_{D} = 1 = ^{1}⁄_{2} * 1 * (V_{GS} – 2)^{2} => V_{GS} = 3.41v.

V_{3} = 3.41v.

QUESTION: 8

(Q.8 & Q.9) For each of the circuits shown find the labeled node voltages. The NMOS transistors have V_{t} = 1 V and k_{n}( W/L ) = 2 mA/V_{2} and λ = 0

Find V_{1} and V_{2}

Solution:

QUESTION: 9

Find V_{3} and V_{4}

Solution:

QUESTION: 10

For the PMOS transistor in the circuit shown k_{n}= 8 µA/V^{2}, W/L = 25,|V_{tp}| = 1V and I = 100μA. For what value of R is V_{SD} = V_{SG}?

Solution:

V_{SG} will be equal to V_{SD} only when the resistance shown is zero or in other words there should not be any resistance.

### Notes - DC Circuits

Doc | 21 Pages

### Bridge Circuits: DC Bridge Circuits

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### Response of DC Circuits

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