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Digital Electronics
‣
Signals and Switches
Comments
Question
The family of logic that is composed of bipolar junction transistors is ____.
Options
A. TTL
B. CMOS
C. DIP
D. BJT
Correct Answer
TTL
Signals and Switches problems
Search Results
1. Serial communication can be sped up by:
Options
A. using silver or gold conductors instead of copper
B. using high-speed clock signals
C. adjusting the duty cycle of the binary information
D. using silver or gold conductors instead of copper and high-speed clock signals
Show Answer
Scratch Pad
Discuss
Correct Answer: using high-speed clock signals
2. A TTL totem-pole circuit is designed so that the output transistors:
Options
A. are always on together
B. provide phase splitting
C. provide voltage regulation
D. are never on together
Show Answer
Scratch Pad
Discuss
Correct Answer: are never on together
3. With surface-mount technology (SMT), the devices should:
Options
A. utilize transistor outline connections
B. mount directly
C. have parallel connecting pins
D. require holes and pads
Show Answer
Scratch Pad
Discuss
Correct Answer: mount directly
4. What is the output voltage
V
out
for the given circuit if the input voltage changes to 0 V?
Options
A. +12 V
B. +15 V
C. +3 V
D. 0 V
Show Answer
Scratch Pad
Discuss
Correct Answer: +12 V
5. What is the minimum voltage required before a diode will allow current to flow between the cathode and the anode?
Options
A. 0.7 V
B. 0.07 V
C. 4.3 V
D. 0.2 V
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.7 V
6. What is a disadvantage of CMOS in place of TTL?
Options
A. It switches slower.
B. It uses less power.
C. It is smaller.
D. cost
Show Answer
Scratch Pad
Discuss
Correct Answer: It switches slower.
7. Why, in most applications, are transistor switches used in place of relays?
Options
A. They consume less power.
B. They are faster.
C. They are quieter and smaller.
D. all of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: all of the above
8. If the input voltage on the base of the transistor in the given figure is changed to +10 V, what is the new voltage at the collector
V
c
?
Options
A. Not enough information is provided.
B.
V
c
= 10 V
C.
V
c
= 0 V
D.
V
c
= 5 V
Show Answer
Scratch Pad
Discuss
Correct Answer:
V
c
= 0 V
9. Why is the given circuit called an inverter?
Options
A. The output is the opposite (inverse) of the input.
B. The output is in phase with the input.
C. The output is the same as the input.
D. There is no output.
Show Answer
Scratch Pad
Discuss
Correct Answer: The output is the opposite (inverse) of the input.
10. Why is parallel data transmission preferred over serial data transmission for most applications?
Options
A. It is much slower.
B. It is cheaper.
C. More people use it.
D. It is much faster.
Show Answer
Scratch Pad
Discuss
Correct Answer: It is much faster.
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