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Home ‣ Digital Electronics ‣ MSI Logic Circuits See What Others Are Saying!
- Question
A breadboard-circuit design using a BCD-to-decimal decoder has a problem wherein the operation of the system is erratic. The technician uses his scope to examine the waveforms throughout the system and doesn't really see any problems. While he's scratching his head, what helpful advice can you offer him as to what might be wrong and what to do to correct the problem?
Options- A. The decoder is thermally intermittent; replace it.
- B. There is probably a bad connection on the wire wrap protoboard; recheck the wiring.
- C. Glitches are probably the culprit; strobe the decoder.
- D. The decoder is thermally intermittent and must be replaced; or there is probably a bad connection on the wire wrap protoboard, and the wiring must be rechecked.
- Correct Answer
- Glitches are probably the culprit; strobe the decoder.
- 1. How many flip-flops are in the 7475 IC?
Options- A. 1
- B. 2
- C. 4
- D. 8 Discuss
- 2. Which of the following logical operations is represented by the + sign in Boolean algebra?
Options- A. inversion
- B. AND
- C. OR
- D. complementation Discuss
- 3. Which of the following logic families has the shortest propagation delay?
Options- A. S-TTL
- B. AS-TTL
- C. HS-TTL
- D. HCMOS Discuss
- 4. Convert decimal 213 to binary.
Options- A. 11001101
- B. 11010101
- C. 01111001
- D. 11100011 Discuss
- 5. Telecommunications systems do not use digital techniques.
Options- A. True
- B. False Discuss
- 6. Many digital electronic systems work in hexadecimal instead of binary.
Options- A. True
- B. False Discuss
- 7. The fastest analog-to-digital converter is the ________.
Options- A. counter ADC
- B. successive-approximation ADC
- C. dual slope ADC
- D. parallel ADC Discuss
- 8. The I/O port that does not have a dual-purpose role is:
Options- A. port 0
- B. port 1
- C. port 2
- D. port 3 Discuss
- 9. How many data bits can be stored in the register shown below?
Options- A. 5
- B. 32
- C. 31
- D. 4 Discuss
- 10. The output of an AND gate is HIGH when any input is HIGH.
Options- A. True
- B. False Discuss
More questions
Correct Answer: 4
Correct Answer: OR
Correct Answer: AS-TTL
Correct Answer: 11010101
Correct Answer: False
Correct Answer: False
Correct Answer: parallel ADC
Correct Answer: port 1
Correct Answer: 5
Correct Answer: False
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