VLSI MOS Circuit Scaling MCQ Quiz – Objective Question with Answer for VLSI MOS Circuit Scaling

11. The parasitic Capacitance has the scaling factor:

a) Equal to gate capacitance
b) 1/α2
c) 1/α
d) 1/β

Answer: c

Parasitic capacitance is scaled by 1/α

.

 

12. The carrier density in the channel in the constant voltage model is scaled as:

a) 1/β
b) 1
c) β
d) All of the mentioned

Answer: d

Carrier density is scaled as 1, since in constant voltage model β = 1, therefore all are correct.

 

13. Carrier density is measured as:

a) Average charge per unit area in the channel in ‘OFF’ state
b) Average charge per unit area in the channel in ‘ON’state
c) Average charge per unit area in the gate oxide
d) None of the mentioned

Answer: b

Carrier density is the Average charge per unit area in the channel in the ‘ON’ state.

 

14. Channel resistance is scaled as:

a) 1/α2
b) 1/β
c) 1/α
d) 1

Answer: d

Channel resistance is scaled by the factor of 1.

 

15. The scaling factor of Gate delay in the Constant field model is:

a) 1/α2
b) 1
c) 1/α
d) β/α

Answer: c

In the Constant field model, the scaling factor of gate delay is 1/α.

 

16. The gate delay is proportional to:

a) Ron .Cg
b) Rs.Cds
c) Rd.Cgs
d) Ron.Cox

Answer: a

The gate delay is proportional to channel resistance and gate capacitance.

17. The maximum operating frequency is scaled by:

a) 1/α2
b) β/α2
c) α2
d) 1

Answer: c

Maximum operating frequency s inversely proportional to the gate delay. It is scaled by α2

 

18. The saturation current is scaled by the factor of:

a) 1
b) 1/α2
c) 1/β
d) 1/α

Answer: c

The saturation current is scaled by the factor of 1/β

19. The scaling factor of current density in the constant voltage model is:

a) 1/α2
b) 1
c) α2
d) α2/β

Answer: c

Current density is scaled by a factor of α2/β and since it is in the Constant voltage model, β = 1, therefore α2 is the correct answer.

 

20. Switching energy per gate is scaled by the factor of:

a) 1
b) α2/β
c) 1/ β.α2
d) α2

Answer: c

Switching energy per gate is scaled by a factor of 1/ β.α2

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