Digital Circuits Flashcards
1
Q
- In analytical instrumentation, little circuitry is concerned with the amplification and processing of signals.
a) True
b) False
A
b) False
2
Q
- Which of the following samples the analog signals to
obtain their digital equivalent?
a) Analog to digital converter
b) Electronic counter
c) Comparator
d) Digital to analog converter
A
a) Analog to digital converter
3
Q
- Which of the following can be used to store
information?
a) Gates
b) ADC
c) DAC
d) Flip-flops
A
d) Flip-flops
4
Q
- Which of the following is known as a nibble?
a) 1 bit
b) 4 bits
c) 8 bits
d) 16 bits
A
b) 4 bits
5
Q
- Two switches are in parallel and are connected with a lamp and supply in series. This represents which of the following logic gate?
a) AND gate
b) OR gate
c) EX-OR gate
d) NOT gate
A
b) OR gate
6
Q
- Which of the following is the binary equivalent of the decimal number 10?
a) 1100
b) 1010
c) 1011
d) 1110
A
b) 1010
7
Q
- 1001 is a data presented on a set of binary coded
decimal output lines. What would be the decimal
equivalent of this number in the case of negative logic?
a) 9
b) 6
c) 1
d) 8
A
b) 6
8
Q
- The output will be logic ‘1’ only if all the inputs are ‘0’. Which gate must be used to execute this condition?
a) AND gate
b) NAND gate
c) NOR gate
d) EX-OR gate
A
b) NAND gate
9
Q
- INHIBIT gate is ________ gate with an inhibiting input.
a) AND gate
b) OR gate
c) EX-OR gate
d) NOT gate
A
b) OR gate
10
Q
- The basic function of TTL gate is which of the following functions?
a) AND
b) OR
c) NOR
d) NAND
A
d) NAND
10
Q
- Which of the following is the most widely employed
logic family?
a) Emitter-coupled logic
b) Transistor-transistor logic
c) CMOS logic family
d) NMOS logic
A
b) Transistor-transistor logic
10
Q
- In TTL logic, the input transistor has a number of
________ equal to the desired fan-in of the circuit.
a) Base
b) Collect
c) Emitter
d) Gate
A
c) Emitter
11
Q
- Which of the following is the propagation delay of TTL circuits?
a) 1 s
b) 1 ms
c) 1 ns
d) 1 ps
A
c) 1 ns
11
Q
- The standard TTL gates are marketed as _______ series.
a) 80
b) 82
c) 74
d) 08
A
c) 74
11
Q
- ECL is a way of achieving a higher speed of gate.
a) True
b) False
A
a) True
11
Q
- Schottky TTL logic family does not have which of the
following features?
a) Good fan-in
b) Good fan-out
c) High speed capability
d) High propagation delay
A
d) High propagation delay
11
Q
- The logic ‘0’ of ECL is represented as ______V and logic ‘1’ is represented as ______V.
a) 1, 1.65
b) 0.9, 1.75
c) 1.2, 2.35
d) 1.9, 4.3
A
b) 0.9, 1.75
12
Q
- The switching of MOS gates can be improved by using CMOS.
a) True
b) False
A
a) True
12
Q
- CMOS gates are commercially available as which of the following series?
a) 1000
b) 2000
c) 3000
d) 4000
A
d) 4000
12
Q
- Which of the following is not the advantage of MOS
gates?
a) Low power dissipation
b) Small size
c) Good immunity to noise
d) High switching speeds
A
d) High switching speeds
