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Discussion
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Digital Electronics
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MSI Logic Circuits
See What Others Are Saying!
Question
A(n) ________ display controls the reflection of available light.
Options
A. MOS
B. LCD
C. LED
D. LSC
Correct Answer
LCD
More questions
1. In the digital clock project, the ENT input and RCO output can be used for synchronous counter cascading.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
2. A pull-up resistor is a resistor used to keep a given point in a circuit HIGH when in the active state.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
3. The 74139 dual four-line demultiplexer functions as a demultiplexer if data input is on the
line.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
4. When
V
GS
= 0 on an N-channel MOSFET switch, there is no ________ between the source and the drain.
Options
A. voltage drop
B. conductive channel
C. capacitance
D. inductance
Show Answer
Scratch Pad
Discuss
Correct Answer: conductive channel
5. The minimum number of flip-flops that can be used to construct a modulus-5 counter is ________.
Options
A. 3
B. 5
C. 8
D. 10
Show Answer
Scratch Pad
Discuss
Correct Answer: 3
6. The timing network that sets the output frequency of a 555 astable circuit contains ________.
Options
A. three external resistors are used
B. two external resistors and an external capacitor are used
C. an external resistor and two external capacitors are used
D. no external resistor or capacitor is required
Show Answer
Scratch Pad
Discuss
Correct Answer: two external resistors and an external capacitor are used
7. When analog inputs from several sources are to be converted, a multiplexing technique can be used so that one ADC may be time-shared.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
8. A parallel in/serial out shift register enters all data bits simultaneously and transfers them out one bit at a time.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
9. In VHDL, if we need to remember a value it must be stored in a ________.
Options
A. function
B. type declaration
C. variable
D. process
Show Answer
Scratch Pad
Discuss
Correct Answer: function
10. The summing outputs of a half- or full-adder are designated by which Greek symbol?
Options
A. omega
B. theta
C. lambda
D. sigma
Show Answer
Scratch Pad
Discuss
Correct Answer: sigma
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