Explore topic-wise MCQs in Vlsi.

This section includes 24 Mcqs, each offering curated multiple-choice questions to sharpen your Vlsi knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following parameters are found using load capacitance?

A. Delay time
B. Power consumption
C. Speed of the CMOS logic
D. All of the mentioned
Answer» E.
2.

Interconnect capacitance is formed due to ___________

A. Junction capacitance between gate and substrate
B. Wire connecting the gates of 2 different inverters
C. Parasitic capacitance existing between metal and polysilicon connection between 2 inverters
D. All of the mentioned
Answer» D. All of the mentioned
3.

Interconnect capacitance contributes to the load capacitance when the CMOS inverters are connected in cascade configuration.

A. True
B. False
Answer» B. False
4.

The load capacitance is equivalent to ___________

A. Sum of all lumped linear capacitances between input and output node
B. Sum of all junction capacitance between Vcc and ground
C. Sum of all junction capacitance between input and output
D. Sum of all lumped linear capacitances between output node and ground
Answer» B. Sum of all junction capacitance between Vcc and ground
5.

The load capacitance is measured between ___________

A. Output node and input node
B. Output node and Vcc
C. Output node and ground
D. Input node and ground
Answer» D. Input node and ground
6.

In the below graph, the regions marked as A,B,C are?

A. A : Saturation, B : Linear, C : Cut-off
B. A :Cut-off, B : Linear, C : Saturation
C. A : Linear, B : Saturation, C : Cut-off
D. None of the mentioned
Answer» C. A : Linear, B : Saturation, C : Cut-off
7.

When MOSFET is operating in saturation region, the gate to source capacitance is?

A. 1/2*Cox*W*L
B. 2/3*Cox*W*L
C. Cox*W*L
D. 1/3*Cox*W*L
Answer» C. Cox*W*L
8.

In saturation mode operation, gate to drain capacitance is zero due to ___________

A. Gate and drain are interconnected
B. Channel length is reduced
C. Inversion layer doesn’t exist
D. Drain is connected to ground
Answer» C. Inversion layer doesn’t exist
9.

In linear mode operation, the parasitic capacitances that exists are ___________

A. Nonzero Gate to source capacitance
B. Nonzero Gate to drain capacitance
C. Zero gate to substrate capacitance
D. All of the mentioned
Answer» E.
10.

In cut-off mode, the value of gate to substrate capacitance is equal to ___________

A. Cox .(W- L)
B. Cox W/ L
C. Cox* W*L
D. 0
Answer» D. 0
11.

In Cut-off Mode, the capacitance Cgs will be equal to ___________

A. 2Cgd
B. 0
C. Cgb
D. All of the mentioned
Answer» C. Cgb
12.

The capacitance that exist between Gate and Bulk is called as ___________

A. Oxide parasitic capacitance
B. Metal oxide capacitance
C. MOS capacitance
D. None of the mentioned
Answer» B. Metal oxide capacitance
13.

The parasitic capacitances found in MOSFET are ___________

A. Oxide related capacitances
B. Inter electrode capacitance
C. Electrolytic capacitance
D. All of the mentioned
Answer» B. Inter electrode capacitance
14.

The capacitances in MOSFET occurs due to _____________

A. Interconnects
B. Difference in Doping concentration
C. Difference in dopant materials
D. All of the mentioned
Answer» E.
15.

WHEN_MOSFET_IS_OPERATING_IN_SATURATION_REGION,_THE_GATE_TO_SOURCE_CAPACITANCE_IS_:?$

A. 1/2*Cox*W*L
B. 2/3*Cox*W*L
C. Cox*W*L
D. 1/3*Cox*W*L
Answer» C. Cox*W*L
16.

Interconnect capacitance is formed due to:

A. Junction capacitance between gate and substrate
B. Wire connecting the gates of 2 different inverters
C. Parasitic capacitance existing between metal and polysilicon connection between 2 inverters
D. All of the mentioned
Answer» E.
17.

The load capacitance is equivalent to:

A. Sum of all lumped linear capacitances between input and output node
B. Sum of all junction capacitance between Vcc and ground
C. Sum of all junction capacitance between input and output
D. Sum of all lumped linear capacitances between output node and ground
Answer» B. Sum of all junction capacitance between Vcc and ground
18.

In saturation mode operation, gate to drain capacitance is zero due to?

A. Gate and drain are interconnected
B. Channel length is reduced
C. Inversion layer doesn’t exit
D. Drain is connected to ground
Answer» C. Inversion layer doesn‚Äö√Ñ√∂‚àö√ë‚àö¬•t exit
19.

Nonzero Gate to source capacitance

A. Nonzero Gate to drain capacitance
B. Zero gate to substrate capacitance
C. All of the mentioned
Answer» C. All of the mentioned
20.

In cut-off mode, the value of gate to substrate capacitance is equal to:

A. Cox .(W- L)
B. Cox W/ L
C. Cox* W*L
D. 0
Answer» D. 0
21.

In Cut-off Mode, the capacitance Cgs will be equal to:

A. 2Cgd
B. 0
C. Cgb
D. All of the mentioned
Answer» C. Cgb
22.

The capacitance that exist between Gate and Bulk is called as:

A. Oxide parasitic capacitance
B. Metal oxide capacitance
C. MOS capacitance
D. None of the mentioned
Answer» B. Metal oxide capacitance
23.

The parasitic capacitances found in MOSFET are:

A. Oxide related capacitances
B. Inter electrode capacitance
C. Electrolytic capacitance
D. All of the mentioned
Answer» B. Inter electrode capacitance
24.

The capacitances in MOSFET occurs due to:

A. Interconnects
B. Difference in Doping concentration
C. Difference in dopant materials
D. All of the mentioned
Answer» E.