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- Question
For the following conditions on a 7485 magnitude comparator, what will be the state of each of the three outputs?
A0 = 0 B0 = 1 IA < B = 0 A1 = 1 B1 = 0 IA = B = 1 A2 = 1 B2 = 0 IA > B = 0 A3 = 0 B3 = 0
Options- A. A = B = 0, A < B = 0, A > B = 1
- B. A = B = 0, A < B = 1, A > B = 0
- C. A = B = 1, A < B = 0, A > B = 0
- D. A = B = 0, A < B = 0, A > B = 0
- Correct Answer
- A = B = 0, A < B = 0, A > B = 1
- 1. One multiplexer can take the place of:
Options- A. several SSI logic gates
- B. combinational logic circuits
- C. several Ex-NOR gates
- D. several SSI logic gates or combinational logic circuits Discuss
- 2. A principle regarding most IC decoders is that when the correct input is present, the related output will switch:
Options- A. active-HIGH
- B. to a high impedance
- C. to an open
- D. active-LOW Discuss
- 3. A BCD decoder will have how many rows in its truth table?
Options- A. 10
- B. 9
- C. 8
- D. 3 Discuss
- 4. If two inputs are active on a priority encoder, which will be coded on the output?
Options- A. the higher value
- B. the lower value
- C. neither of the inputs
- D. both of the inputs Discuss
- 5. One way to convert BCD to binary using the hardware approach is:
Options- A. with MSI IC circuits
- B. with a keyboard encoder
- C. with an ALU
- D. UART Discuss
- 6. The expansion inputs to a comparator are used for expansion to a(n):
Options- A. 4-bit system
- B. 8-bit system
- C. BCD system
- D. counter system Discuss
- 7. Why is the Gray code more practical to use when coding the position of a rotating shaft?
Options- A. All digits change between counts.
- B. Two digits change between counts.
- C. Only one digit changes between counts. Discuss
- 8. A look-up table is simply a truth table with all the possible output connections listed with their desired input response.
Options- A. True
- B. False Discuss
- 9. Which of the following testing procedures has one or more external moving parts?
Options- A. Bed-of-nails
- B. Flying probe
- C. EXTEST
- D. Boundary scan Discuss
- 10. PIA is an acronym for ________.
Options- A. Programmable Interface Array
- B. Post Integrated Array
- C. Programmable Input Array
- D. Programmable Interconnect Array Discuss
Code Converters and Multiplexers problems
Search Results
Correct Answer: several SSI logic gates or combinational logic circuits
Correct Answer: active-LOW
Correct Answer: 10
Correct Answer: the higher value
Correct Answer: with MSI IC circuits
Correct Answer: 8-bit system
Correct Answer: Only one digit changes between counts.
Correct Answer: False
Correct Answer: Flying probe
Correct Answer: Programmable Interconnect Array
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