Digital Circuit and Microprocessor MCQs

Question 1

The main advantage claimed for ECL family of logic gates is its

Accepted Answer

extremely low propagation times

Answer

very large fan-in

Answer

use of negative power supply voltage

Answer

least power dissipation

Question 2

Special feature of an 12L logic circuit is that it

Accepted Answer

uses no biasing and loading resistors

Answer

uses ony high-value resistors

Answer

dissipates negligible power

Answer

is a bipolar saturated logic

Question 3

A unique advantages feature of CMOS logic family is its

Accepted Answer

power dissipation in nanowatt range

Answer

use of NMOS circuits

Answer

speed

Answer

dependence on frequency for power dissipation.

Question 4

CMOS circuits are extensively used for onchip computers mainly because of their extremely

Accepted Answer

large packing density

Answer

low power dissipation

Answer

high noise immunity

Answer

low cost

Question 5

The main advantage of a CMOS logic family over the TTL family is its

Accepted Answer

much reduced power

Answer

increased spe:d of operation

Answer

extremely low cost

Answer

series base resistor

Question 6

CMOS logic family uses only

Accepted Answer

MOSFETs

Answer

MOSFETs and resistors

Answer

NMOS circuits

Answer

bipolar transistors

Question 7

The most obvious identifying feature of a TTL gate is its

Accepted Answer

multiemetter input transistor

Answer

large fan-out

Answer

high power dissipation

Answer

interconnected transistors

Question 8

In digital circuits shottky transistors are preferred over normal transistor because of their

Accepted Answer

lower propagation delay

Answer

higher propagation delay

Answer

lower power dissipation

Answer

higher power dissipation

Question 9

A unique operting feature of ECL circuit is its

Accepted Answer

very high speed

Answer

high power dissipation

Answer

series base resistor

Answer

compatibility with other logic series