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Digital ElectronicsArithmetic Circuits

The principal purpose of carry look-ahead logic in a binary adder is to?

  • AReduce carry propagation delay
  • BConvert binary to Gray code
  • CStore the carry permanently
  • DReduce the number of sum bits
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Correct Answer: A. Reduce carry propagation delay
Explanation: Carry look-ahead forms carry signals from generate and propagate terms in parallel, reducing the delay associated with a ripple-carry chain.
Reference: Standard digital electronics: carry look-ahead
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