EC > GATE 2024 > MOSFET Amplifiers
In the circuit below, assume that the long channel NMOS transistor is biased in saturation.
The small signal trans-conductance of the transistor is $g_{m}$. Neglect body effect, channel length modulation and intrinsic device capacitances.
The small signal input impedance $Z_{in}(j\omega)$ is
A
$\frac{-g_{m}}{C_{1}C_{L}\omega^{2}}+\frac{1}{j\omega C_{1}}+\frac{1}{j\omega C_{L}}$
B
$\frac{g_{m}}{C_{1}C_{L}\omega^{2}}+\frac{1}{j\omega C_{1}}+\frac{1}{j\omega C_{L}}$
C
$\frac{1}{j\omega C_{1}}+\frac{1}{j\omega C_{L}}$
D
$\frac{-g_{m}}{C_{1}C_{L}\omega^{2}}+\frac{1}{j\omega C_{1}+j\omega C_{L}}$

Correct : A

Similar Questions

For the closed loop amplifier circuit shown below, the magnitude of open loop low frequency small signal voltage gain is 40. All the transistors are biased in s...
#39 MCQ
In the circuit shown below, the transistors $M_1$ and $M_2$ are biased in saturation.Their small signal transconductances are $g_{m1}$ and $g_{m2}$ respectively...
#72 MCQ
Which of the following statements is/are TRUE with respect to ideal MOSFET-based DC-coupled single-stage amplifiers having finite load resistors?
#186 MCQ

Related Topics

No tags found

Unique Visitor Count

Total Unique Visitors

Loading......

Question Options

Contributed by: