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- Question
An astable multivibrator is a circuit that ________.
Options- A. has two stable states
- B. is free-running
- C. produces a continuous output signal
- D. is free-running and produces a continuous output signal
- Correct Answer
- produces a continuous output signal
- 1. On a J-K flip-flop, when is the flip-flop in a hold condition?
Options- A. J = 0, K = 0
- B. J = 1, K = 0
- C. J = 0, K = 1
- D. J = 1, K = 1 Discuss
- 2. Determine the output frequency for a frequency division circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz.
Options- A. 10.24 kHz
- B. 5 kHz
- C. 30.24 kHz
- D. 15 kHz Discuss
- 3. The symbol shown below is an AND gate.
Options- A. True
- B. False Discuss
- 4. A NAND gate consists of an AND gate and an OR gate connected in series with each other.
Options- A. True
- B. False Discuss
- 5. Gate arrays are ULSI circuits that offer hundreds of thousands of gates.
Options- A. True
- B. False Discuss
- 6. How many inputs of a four-input AND gate must be HIGH in order for the output of the logic gate to go HIGH?
Options- A. any one of the inputs
- B. any two of the inputs
- C. any three of the inputs
- D. all four inputs Discuss
- 7. When grouping cells within a K-map, the cells must be combined in groups of ________.
Options- A. 2s
- B. 1, 2, 4, 8, etc.
- C. 4s
- D. 3s Discuss
- 8. What is the difference between a ring shift counter and a Johnson shift counter?
Options- A. There is no difference.
- B. A ring is faster.
- C. The feedback is reversed.
- D. The Johnson is faster. Discuss
- 9. An 8-bit serial in/serial out shift register is used with a clock frequency of 2 MHz to achieve a time delay (td) of ________.
Options- A. 16 µs
- B. 8 µs
- C. 4 µs
- D. 2 µs Discuss
- 10. How is a strobe signal used when serially loading a shift register?
Options- A. to turn the register on and off
- B. to control the number of clocks
- C. to determine which output Qs are used
- D. to determine the FFs that will be used Discuss
More questions
Correct Answer: J = 0, K = 0
Correct Answer: 5 kHz
Correct Answer: True
Correct Answer: False
Correct Answer: True
Correct Answer: all four inputs
Correct Answer: 1, 2, 4, 8, etc.
Correct Answer: The feedback is reversed.
Correct Answer: 4 µs
Correct Answer: to control the number of clocks
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