VLSI- MCQ

In accordance to the scaling technology, the total delay of the logic circuit depends on ______

• a. The capacitor to be charged

• b. The voltage through which capacitance must be charged

• c. Available current

• d. All of the above

In high noise margin (NM_H), the difference in magnitude between the maximum HIGH output voltage of driving gate and the maximum HIGH voltage is recognized by the _________gate.

• a. Driven

• b. Receiving

• c. Both a and b

• d. None of the above

Which factor/s play/s a crucial role in determining the speed of CMOS logic gate?

• a. Load capacitance

• b. Supply voltage

• c. Gain factor of MOS

• d. All of the above

In CMOS circuits, which type of power dissipation occurs due to switching of transient current and charging & discharging of load capacitance?

• a. Static dissipation

• b. Dynamic dissipation

• c. Both a and b

• d. None of the above

For complex gate design in CMOS, OR function needs to be implemented by _______ connection/s of MOS.

• a. Series

• b. Parallel

• c. Both series and parallel

• d. None of the above

In pull-up network, PMOS transistors of CMOS are connected in parallel with the provision of conducting path between output node & Vdd yielding _____ output.

• a. 1

• b. 0

• c. Both a and b

• d. None of the above

In CMOS inverter, the propagation delay of a gate is the/an _________ transition delay time for the signal during propagation from input to output especially when the signal changes its value.

• a. Highest

• b. Average

• c. Lowest

• d. None of the above

In enhancement MOSFET, the magnitude of output current __________ due to an increase in the magnitude of gate potentials.

• a. Increases

• b. Remains constant

• c. Decreases

• d. None of the above

Which type of MOSFET exhibits no current at zero gate voltage?

• a. Depletion MOSFET

• b. Enhancement MOSFET

• c. Both a and b

• d. None of the above

The power consumption of static CMOS gates varies with the _____ of power supply voltage.

• a. square

• b. cube

• c. fourth power

• d. 1/8 th power