Computer System Architecture - Digital Logic Circuits - Combinational Circuits
12. Which of the following statements is wrong ?
- A
Propagation delay is the time required for a gate to change its state
- B
Noise immunity is the amount of noise which can be applied to the input of a gate without causing the gate to change state
- C
Fan-in of a gate is always equal to fan-out of the same gate
- D
Operating speed is the maximum frequency at which digital data can be applied to a gate
13. Which of the following expressions is not equivalent to X' ?
- Option : D
- Explanation : Answer is C as if X= 0 then X NAND 1 = 1 = X' if X=1 then X NAND 1= 0= X' In Option (d) if X= 0 then X NOR 0 = 1 = X' if X=1 then X NOR 1= 0 X'
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