Electronics and Communication Engineering - Digital Electronics
Exercise :: Digital Electronics - Section 23
| 1. |
Assertion (A): The TTL output acts as a current sink in low state Reason (R): The TTL input current is largest in low state. |
| A. |
Both A and R are correct and R is correct explanation of A | | B. |
Both A and R are correct but R is not correct explanation of A | | C. |
A is true, R is false | | D. |
A is false, R is true |
Answer: Option B
Explanation:
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| 2. |
The number of LED display indicators in logic probe are |
Answer: Option B
Explanation:
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| 3. |
The time needed by a TTL circuit to switch from 0 to 1 or 1 to 0 is about |
Answer: Option B
Explanation:
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| 4. |
Assertion (A): R-2R ladder type DAC has higher speed of operation than weighted resistor DAC Reason (R): R-2R ladder type DAC uses only two different values of resistor network uses many different values of resistors |
| A. |
Both A and R are correct and R is correct explanation of A | | B. |
Both A and R are correct but R is not correct explanation of A | | C. |
A is true, R is false | | D. |
A is false, R is true |
Answer: Option B
Explanation:
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| 5. |
Which of the following circuits can be used as parallel-to-series converter? |
| A. |
Digital counter | | B. |
Decoder | | C. |
Demultiplexer | | D. |
Multiplexer |
Answer: Option D
Explanation:
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