DIGITAL IC DESIGN

VTC Characteristic curve of a CMOS inverter is shown in figure, find the region of operation of NMOS and PMOS at point A

• NMOS -LINEAR

  PMOS-OFF

• NMOS -LINEAR

  PMOS-SAT

• NMOS -SAT

  PMOS-LINEAR

• NMOS -OFF

  PMOS-LINEAR

For VTC of the inverter shown in figure which of the following is false?

• NMH=VDD-VIH

• NML=VDD+VIL

Which of the following you will consider important while designing an efficient IC.

• Low Power device

• High Speed Device

• Low Energy-Delay Product devices

• High Energy-Delay Product devices

Find the output Y when A=B=C=VDD and the threshold drop is Vtn

• Y=VDD

• Y=VDD-VTN

• Y=VDD-2VTN

Which of the following are the Issues in dynamic IC design?

(multiple answers are right)

• Charge Sharing

• Charge Leakage

• Capacitive Coupling

• Clock Feedthrougn

What is the most important disadvantage of Domino Logic

• Non-Inverting output

• Use of an extra Inverter

• Cannot handle large fan in logic.

• No Pull up logic circuit like static CMOS inverter.

What type of design technique is shown in the figure?

• Domino Logic

• n-P CMOS

• Ratioed Logic

• Sequential Circuits

When two inverters are connected back to back the VTC is shown in figure.

What is Point C in the figure

• Unstable State

• Metastable state

• Switching Threshold

• Operating Point

The maximum current through an electrical metal interconnect in an IC is limited by

• Temperature

• Electromigration

• Coupling Capacitance

• Neighbouring metal wire

Advantage of using Polysilicon in IC fabrication

• Very Low resistivity

• Abundant in nature

• High temperature Processing

• Can be easily used in Manhattan-style routing.