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- Question
A positive edge-triggered J-K flip-flop is used to produce a two-phase clock. However, when the circuit is operated it produces erratic results. Close examination with a scope reveals the presence of glitches. What causes the glitches, and how might the problem be corrected?
Options- A. The PRESET and CLEAR terminals may have been left floating; they should be properly terminated if not being used.
- B. The problem is caused by a race condition between the J and K inputs; an inverter should be inserted in one of the terminals to correct the problem.
- C. A race condition exists between the Q and Q outputs to the AND gate; the AND gate should be replaced with a NAND gate.
- D. A race condition exists between the clock and the outputs of the flip-flop feeding the AND gate; replace the flip-flop with a negative edge-triggered J-K Flip-Flop.
- Correct Answer
- A race condition exists between the clock and the outputs of the flip-flop feeding the AND gate; replace the flip-flop with a negative edge-triggered J-K Flip-Flop.
- 1. Which is not a part of a GAL16V8's OLMC?
Options- A. TSMUX
- B. OMUX
- C. FMUX
- D. PSMUX Discuss
- 2. Output will be a LOW for any case when one or more inputs are zero for a(n):
Options- A. OR gate
- B. NOT gate
- C. AND gate
- D. NOR gate Discuss
- 3. The sum of 11101 + 10111 equals ________.
Options- A. 110011
- B. 100001
- C. 110100
- D. 100100 Discuss
- 4. Hex is often used in digital applications as a shorthand way to represent strings of bits.
Options- A. True
- B. False Discuss
- 5. Four cascaded modulus-10 counters have an overall modulus of ________.
Options- A. 10
- B. 100
- C. 1,000
- D. 10,000 Discuss
- 6. VHDL is not a new language.
Options- A. True
- B. False Discuss
- 7. Which is not a removable drive?
Options- A. Zip
- B. Jaz
- C. Hard
- D. SuperDisk Discuss
- 8. Which microprocessor has multiplexed data and address lines?
Options- A. 8086/8088
- B. 80286
- C. 80386
- D. Pentium Discuss
- 9. One of the stages in a register consists of a latch.
Options- A. True
- B. False Discuss
- 10. A VHDL component is a predefined logic function.
Options- A. True
- B. False Discuss
More questions
Correct Answer: PSMUX
Correct Answer: AND gate
Correct Answer: 110100
Correct Answer: True
Correct Answer: 10,000
Correct Answer: True
Correct Answer: Hard
Correct Answer: 8086/8088
Correct Answer: True
Correct Answer: False
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