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2. Carry-lookahead adder - Wikipedia

   en.wikipedia.org/wiki/Carry-lookahead_adder

   The carry-lookahead adder calculates one or more carry bits before the sum, which reduces the wait time to calculate the result of the larger-value bits of the adder. Already in the mid-1800s, Charles Babbage recognized the performance penalty imposed by the ripple-carry used in his Difference Engine , and subsequently designed mechanisms for ...

3. Adder (electronics) - Wikipedia

   en.wikipedia.org/wiki/Adder_(electronics)

   This can be used at multiple levels to make even larger adders. For example, the following adder is a 64-bit adder that uses four 16-bit CLAs with two levels of lookahead carry units. Other adder designs include the carry-select adder, conditional sum adder, carry-skip adder, and carry-complete adder.

4. Lookahead carry unit - Wikipedia

   en.wikipedia.org/wiki/Lookahead_carry_unit

   By combining 4 CLAs and an LCU together creates a 16-bit adder. Four of these units can be combined to form a 64-bit adder. An additional (second-level) LCU is needed that accepts the propagate and generate from each LCU and the four carry outputs generated by the second-level LCU are fed into the first-level LCUs.

5. Brent–Kung adder - Wikipedia

   en.wikipedia.org/wiki/Brent–Kung_adder

   The Brent–Kung adder is a parallel prefix adder (PPA) form of carry-lookahead adder (CLA). Proposed by Richard Peirce Brent and Hsiang Te Kung in 1982 it introduced higher regularity to the adder structure and has less wiring congestion leading to better performance and less necessary chip area to implement compared to the Kogge–Stone adder (KSA).

6. Category:Adders (electronics) - Wikipedia

   en.wikipedia.org/wiki/Category:Adders_(electronics)

   Ling adder; Lookahead carry unit; S. Serial binary adder; Sklansky adder This page was last edited on 4 July 2020, at 16:10 (UTC). Text is available under ...

7. Early completion - Wikipedia

   en.wikipedia.org/wiki/Early_completion

   A ripple carry adder is a simple adder circuit, but slow because the carry signal has to propagate through each stage of the adder: This diagram shows a 5-bit ripple carry adder in action. There is a five-stage long carry path, so every time two numbers are added with this adder, it needs to wait for the carry to propagate through all five stages.

8. AOL Mail - AOL Help

   help.aol.com/products/aol-webmail

   Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.

9. Carry-select adder - Wikipedia

   en.wikipedia.org/wiki/Carry-select_adder

   The carry-select adder generally consists of ripple-carry adders and a multiplexer.Adding two n-bit numbers with a carry-select adder is done with two adders (therefore two ripple-carry adders), in order to perform the calculation twice, one time with the assumption of the carry-in being zero and the other assuming it will be one.