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Home ‣ Digital Electronics ‣ Programmable Logic Device See What Others Are Saying!
- Question
With microcomputer/DSP systems, devices can be electronically controlled and data can be manipulated by executing a program of instructions that has been written for the application.
Options- A. True
- B. False
- Correct Answer
- True
- 1. Propagation delay is important because ________.
Options- A. the logic gates must be given a short break during each clock cycle or else they will overheat
- B. it limits the maximum operating frequency of a gate
- C. it is a measure of how long the clock must be applied to the gate before it will make the required decision
- D. all the gates in a system must have the same propagation times in order to be compatible Discuss
- 2. The carry propagation can be expressed as ________.
Options- A. Cp = AB
- B. Cp = A + B
- C.
- D.
Discuss
- 3. The odd/even parity system would require a sixth bit to be added to a 4-bit system.
Options- A. True
- B. False Discuss
- 4. In a digital storage scope, when memory is full, the next data point is lost.
Options- A. True
- B. False Discuss
- 5. A D flip-flop utilizing a PGT clock is in the CLEAR state. Which of the following input actions will cause it to change states?
Options- A. CLK = NGT, D = 0
- B. CLK = PGT, D = 0
- C. CLOCK NGT, D = 1
- D. CLOCK PGT, D = 1
- E. CLK = NGT, D = 0, CLOCK NGT, D = 1 Discuss
- 6. What is the difference between combinational logic and sequential logic?
Options- A. Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.
- B. Combinational and sequential circuits are both triggered by timing pulses.
- C. Neither circuit is triggered by timing pulses. Discuss
- 7. There are four different logic level ranges for TTL and CMOS: VIL, VIH, VOL, and VOH.
Options- A. True
- B. False Discuss
- 8. One method of troubleshooting involves ________ the circuit under test with a ________ or ________ and then observing the output to check for proper bit patterns.
Options- A. checking, voltmeter, ohmmeter
- B. exercising, stimulus, test pattern
- C. testing, scope, logic analyzer
- D. smashing, hammer, axe Discuss
- 9. A demultiplexer is a device that converts some code to a recognizable number or character.
Options- A. True
- B. False Discuss
- 10. What distinguishes the look-ahead-carry adder?
Options- A. It is slower than the ripple-carry adder.
- B. It is easier to implement logically than a full adder.
- C. It is faster than a ripple-carry adder.
- D. It requires advance knowledge of the final answer. Discuss
More questions
Correct Answer: the logic gates must be given a short break during each clock cycle or else they will overheat
Correct Answer: Cp = A + B
Correct Answer: False
Correct Answer: False
Correct Answer: CLOCK PGT, D = 1
Correct Answer: Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.
Correct Answer: True
Correct Answer: exercising, stimulus, test pattern
Correct Answer: False
Correct Answer: It is faster than a ripple-carry adder.
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