1
GATE ECE 2017 Set 2
Numerical
+1
-0
Consider an n-channel MOSFET having width W, length L, electron mobility in the channel $$\mu_n$$ and oxide capacitance per unit area $$C_{ox}$$. If gate-to-source voltage VGS=0.7 V, drain-to source voltage VDS=0.1V, $$\left(\mu_nC_{ox}\right)\;=\;100\;\mu A/V^2$$, threshold voltage VTH=0.3 V and (W/L) = 50, then the transconductance gm (in mA/V) is ___________.
Your input ____
2
GATE ECE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
An n-channel enhancement mode MOSFET is biased at VGS > VTH and VDS > (VGS - VTH), where VGS is the gate-to-source voltage, VDS is the drain-to-source voltage and VTH is the threshold voltage. Considering channel length modulation effect to be significant, the MOSFET behaves as a
A
voltage source with zero output impedance
B
voltage source with non-zero output impedance
C
current source with finite output impedance
D
current source with infinite output impedance
3
GATE ECE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
For the circuit shown in the figure, P and Q are the inputs and Y is the output. GATE ECE 2017 Set 2 Electronic Devices and VLSI - IC Basics and MOSFET Question 44 English The logic implemented by the circuit is
A
XNOR
B
XOR
C
NOR
D
OR
4
GATE ECE 2017 Set 2
MCQ (Single Correct Answer)
+2
-0.6
Two n-channel MOSFETs, T1 and T2, are identical in all respects except that the width of T2 is double of T1. Both the transistor are biased in the saturation region of operation, but the gate overdrive voltage (VGS - VTH) of T2 is double that of T1, where VGS and VTH are the gate-to-source voltage and threshold voltage of the transistors, respectively. If the drain current and transconductance of T1 are ID1 and gm1 respectively ; the corresponding values of these two parameters for T2 are
A
8ID1 and 2gm1
B
8ID1 and 4gm1
C
4ID1 and 4gm1
D
4ID1 and 2gm1