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QUESTION: 1

Calculate the overall voltage gain G_{v} of a common source amplifier for which g_{m} = 2mA/V, R_{D} = 10 kΩ, R_{0} = 10 kΩ and R_{G} = 10 MΩ. The amplifier is fed from a signal source of Thevenin resistance of 0.5MΩ and the amplifier is coupled with a load of 10 kΩ.

Solution:

QUESTION: 2

(Q.2-Q.6) The MOSFEt circuit below has V_{t} = 1V, k_{n}W/L = 0.8 mA/V^{2} and V_{A} = 40V

Find the value of R_{G} so that i_{D} = 0.1 mA, the largest possible value of R_{D} is used while the maximum signal swing at the drain is of 1V and the input resistance at the gate is 10 MΩ.

Solution:

QUESTION: 3

Find the value of gm at the bias point

Solution:

QUESTION: 4

If terminal Z is grounded, X is connected to a signal source having a resistance of 1 MΩ and terminal Y is connected to a load resistance of 40 kΩ, find the voltage gain from the signal source to the load.

Solution:

QUESTION: 5

If terminal Y is grounded find the voltage gain from X to Z with Z open-circuit.

Solution:

QUESTION: 6

If terminal X is grounded and terminal Z is connected to a current source delivering a current of 10 µA and having a resistance of 100 kΩ, find the voltage signal that can be measured at Y neglecting the effect of V_{0} .

Solution:

QUESTION: 7

(Q.7-Q.8) The NMOS transistor in source follower circuit shown has g_{m} = 5mA/V and a large r_{0}

**Q. Find the output resistance.**

Solution:

QUESTION: 8

Find the open-Circuit voltage gain.

Solution:

QUESTION: 9

The NMOS transistor in the common gate amplifier as shown in the circuit below has g_{m} = 5 mA/V. Find the input resistance and the voltage gain.

Solution:

QUESTION: 10

If the output of the source follower in (I) is connected to the input of the common gate amplifier of (II). Determine the overall voltage gain (V_{0} /V_{i} ).

Solution:

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