WorksheetsUNIT-10
Total questions: 18
Worksheet time: 12mins
Name
Class
Date
1.
Ten TTL loads per TTL driver is known as
a)
noise immunity
b)
c
c)
power dissipation
d)
propagation delay
2.
Which type of the logic family is fabricated with simple circuit?
a)
CMOS
b)
ECL
c)
I2L
d)
TTL
3.
Which of the following is the most widely employed logic family?
a)
Emitter-coupled logic
b)
Transistor-transistor logic
c)
PMOS logic family
d)
NMOS logic
4.
Which of the following functions is the basic function of TTL gate ?
a)
AND
b)
OR
c)
EX-OR
d)
NAND
5.
Which of the following is the Propogation Delay of TTL Circuits?
a)
1 s
b)
10 s
c)
1 ns
d)
1 ps
6.
The standard TTL circuits are marked as ____________ series
a)
74
b)
82
c)
80
d)
8
7.
Which of the following is the advantage of MOS gates?
a)
Low power dissipation
b)
Small size
c)
Good immunity to noise
d)
High switching speeds
8.
CMOS gates are commercially available as which of the following series?
a)
1000
b)
2000
c)
3000
d)
4000
9.
CMOS operates more reliably than TTL in a high-noise environment because of its
a)
lower noise margin
b)
input capacitance
c)
higher noise margin
d)
smaller power dissipation
10.
When the frequency of the input signal to a CMOS gate is increased, the average power dissipation
a)
decreases
b)
increases
c)
does not change
d)
decreases exponentially
11.
Why must CMOS devices be handled with care?
a)
so they don’t get dirty
b)
because they break easily
c)
because they can be damaged by static electricity discharge
d)
all of the above
12.
Which of the following logic families has the shortest propagation delay?
a)
CMOS
b)
BiCMOS
c)
ECL
d)
74SXX
13.
What is the major advantage of ECL logic?
a)
very high speed
b)
wide range of operating voltage
c)
very low cost
d)
very high power
14.
An open collector output can ________ current, but it cannot ________.
a)
sink, source current
b)
source, sink current
c)
sink, source voltage
d)
source, sink voltage
15.
Which of the following logic families provide lowest Noise Margin?
a)
CMOS
b)
ECL
c)
I2L
d)
TTL
16.
The word "interfacing" as applied to digital electronics usually means:
a)
a conditioning circuit connected between a standard TTL NAND gate and a standard TTL OR gate
b)
a circuit connected between the driver and load to condition a signal so that it is compatible with the load
c)
any gate that is a TTL operational amplifier designed to condition signals between NMOS transistors
d)
any TTL circuit that is an input buffer stage
17.
Why is a pull-up resistor needed when connecting TTL logic to CMOS logic?
a)
to increase the output LOW voltage
b)
to decrease the output LOW voltage
c)
to increase the output HIGH voltage
d)
to decrease the output HIGH voltage
18.
When is a level-shifter circuit needed in interfacing logic?
a)
A level shifter is always needed.
b)
A level shifter is never needed.
c)
when the supply voltages are the same
d)
when the supply voltages are different
100 %
