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Digital Electronics
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Combinational Logic Analysis
See What Others Are Saying!
Question
A VHDL component is a predefined logic function.
Options
A. True
B. False
Correct Answer
False
More questions
1. The major blocks of the frequency counter are the counter, ________, decoder/display, and the timing and control unit.
Options
A. signal prescaler
B. control inputs
C. signal generator
D. display register
Show Answer
Scratch Pad
Discuss
Correct Answer: display register
2. Shift register counters use logic functions to reset the registers when the desired count is reached.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
3. The software used to drive a microprocessor-based system is called FORTRAN.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
4. The time delay called access time,
t
ac
, is a measure of the ROM's operating speed.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
5. The 8051 has ________ 16-bit counter/timers.
Options
A. 1
B. 2
C. 3
D. 4
Show Answer
Scratch Pad
Discuss
Correct Answer: 2
6. The CPU (Central Processing Unit) is composed of memory and outputs.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
7. Using separate serial inputs for shifting left or shifting right is a major difference between the 74194 and other shift registers.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
8. The time interval on the leading edge of a pulse between 10% and 90% of the amplitude is the rise time.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
9. In the keypad HDL encoder, the
ts
bit array represents a tristate buffer.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
10. ________ is a mature technology consisting of numerous subfamilies that have been developed over many years of use.
Options
A. TTL
B. CMOS
C. ECL
D. None of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: TTL
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