VLSI design

2. In CMOS logic circuit the p-MOS transistor acts as:

Pull down network

• Pull down network

• Pull up network

• Load

• Short to ground

Doubling the amount of transistors in every 18 months, is known as

• Gordan's Law

• Moore's Law

• Moor's law

• None of these

Which type of substrate is used to design NMOS transistor?

• p-type

• n-type

• polysilicon

• none of these

Silicon oxide is patterned on a substrate using:

• Physical lithography

• Chemical lithography

• photolithography

• none of these

which type of CMOS circuits are good and better

• p-well

• n-well

• all of the mentioned

• none of these

in CMOS fabrication, n-MOS and p-MOS are fabricated on the same substrate

• true

• false

Accumulation in the substrate for a NMOS takes place when

• Positive voltage is applied to the gate

• negative Voltage is applied to the gate

• The gate is grounded

• Accumulation does not depend on the gate voltage

When the MOSFET is no longer able to control the current, this point is called the:

• a. Breakdown region

• b. Saturation region

• c. Depletion region

• d. Pinch-off region

As channel length becomes smaller

• a. Longitudinal electric field component Ey reduces

• b. Longitudinal electric field component Ey remains same

• c. Longitudinal electric field component Ey increases

• d. None of the above

In accumulation region, the value of the MOS capacitance is

• a. = Cox

• b. < Cox

• c. > Cox

• d. 0