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Variants of an Improved Carry Look-Ahead Adder
September 1988 (vol. 37 no. 9)
pp. 1110-1113
An improved variation on the carry look-ahead adder has been proposed by H. Ling (IBM J. Res. Develop., vol.25, p.156, May 1981). Ling's approach is based on the propagation of a composite term in place of the conventional look-ahead carry. This approach gives an adder that is faster and less expensive. In the present study, Ling's adder is introduced and described in a general manner in order

[1] H. Ling, "High speed binary adder,"IBM J. Res. Develop., vol. 25, p. 156, May 1981.
[2] N. R. Scott,Computer Number Systems&Arithmetic. Englewood Cliffs, NJ: Prentice-Hall, 1985, ch. 5.

Index Terms:
adder; improved; carry look-ahead adder; variation; look-ahead carry; adders.
R.W. Doran, "Variants of an Improved Carry Look-Ahead Adder," IEEE Transactions on Computers, vol. 37, no. 9, pp. 1110-1113, Sept. 1988, doi:10.1109/12.2261
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