Kral
Joined: 28 Mar 2005
Posts: 1182
Helped: 187
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 06 Oct 2005 18:50 Re: adders |
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pravi,
The carry save adder is used to add 3 numbers together where you are not interested in the intermediate result. This results in considerable saving in logic and gate delays.
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The carry look-ahead adder is a method of "anticipating" what the carry of the current bit position operation will be without waiting for the result. It is accomplished by looking at the previous (lower order) bit positions and carrys. The result is faster propogation of carrys, and faster allowable clock rates.
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See h**p://www.deepchip.com/items/0343-13.html for a good explanation.
Regards,
Kral
Added after 1 minutes:
pravi,
The carry save adder is used to add 3 numbers together where you are not interested in the intermediate result. This results in considerable saving in logic and gate delays.
.
The carry look-ahead adder is a method of "anticipating" what the carry of the current bit position operation will be without waiting for the result. It is accomplished by looking at the previous (lower order) bit positions and carrys. The result is faster progpgation of carrys, and faster allowable clock rates.
.
See h**p://www.deepchip.com/items/0343-13.html for a good explanation.
Regards,
Krasl
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