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- Question
A logic probe is placed on the output of a digital circuit and the probe lamp is dimly lit. This display indicates ________.
Options- A. that an open or bad logic level exists
- B. a high level output
- C. a high-frequency pulse train
- D. that the supply voltage is low
- Correct Answer
- that an open or bad logic level exists
- 1. The duty cycle of a square wave is ________.
Options- A. 10%
- B. 25%
- C. 50%
- D. 100% Discuss
- 2. The VHDL editor provided with a schematic editor development system will produce a file with the extension .vhd, which can be used by the simulator to test the output of the logic design.
Options- A. True
- B. False Discuss
- 3. An ADC that uses an up/down counter (and other devices) to follow changes in the input analog signal is a ________.
Options- A. single-slope ramp converter
- B. dual-slope ramp converter
- C. successive-approximation converter
- D. tracking converter Discuss
- 4. The logic gate that will have a LOW output when any one of its inputs is HIGH is the:
Options- A. NAND gate
- B. AND gate
- C. NOR gate
- D. OR gate Discuss
- 5. Each "1" entry in a K-map square represents:
Options- A. a HIGH for each input truth table condition that produces a HIGH output.
- B. a HIGH output on the truth table for all LOW input combinations.
- C. a LOW output for all possible HIGH input conditions.
- D. a DON'T CARE condition for all possible input truth table combinations. Discuss
- 6. For a multistage counter to be truly synchronous, the ________ of each stage must be connected to ________.
Options- A. Cp, the same clock input line
- B. CE, the same clock input line
- C.
, the terminal count output - D.
, both clock input lines
Discuss
- 7. The ________ circuit produces a HIGH output whenever the two inputs are unequal.
Options- A. exclusive-AND
- B. exclusive-NOR
- C. exclusive-OR
- D. inexclusive-OR Discuss
- 8. A Karnaugh map will ________.
Options- A. eliminate the need for tedious Boolean simplifications
- B. allow any circuit to be implemented with just AND and OR gates
- C. produce the simplest sum-of-products expression
- D. give an overall picture of how the signals flow through the logic circuit Discuss
- 9. A 4-bit adder has the following inputs: C0 = 0, A1 = 0, A2 = 1, A3 = 0, A4 = 1, B1 = 0, B2 = 1, B3 = 1, B4 = 1. The output will be ________.
Options- A. 01100
- B. 10101
- C. 11000
- D. 00011 Discuss
- 10. How can a digital one-shot be implemented using HDL?
Options- A. By using a resistor and a capacitor
- B. By applying the concept of a counter
- C. By using a library function
- D. By applying a level trigger Discuss
More questions
Correct Answer: 50%
Correct Answer: True
Correct Answer: tracking converter
Correct Answer: NOR gate
Correct Answer: a HIGH for each input truth table condition that produces a HIGH output.
Correct Answer: Cp, the same clock input line
Correct Answer: exclusive-OR
Correct Answer: eliminate the need for tedious Boolean simplifications
Correct Answer: 11000
Correct Answer: By applying the concept of a counter
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