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Unifying Carry-sum and Signed-digital Number Representations for Low Power by Chetana Nagendra, Robert Michael Owens and Mary Jane Irwin is a scholarly article available to read on EtoBox.

What is Unifying Carry-sum and Signed-digital Number Representations for Low Power about?

Historically, signed-digit adders have been thought of as being logically very complicated to implement, while carry-save adders have been considered to be fast, low p o w er and easy to implement. While the latter is true, the former is a misconception. We show that for every integer k 1, it is possible to build a network of radix-2 k signed-digit adders having the same logical complexity and hence the same area, delay and power consumption as a network of k-bit carry-sum adders (where, a 1-bit carry-sum adder is a carry-save adder). We also study the power and delay tradeos involved in using a network of carry-save and signed-digit adders for adding multiple operands when compared to a fast two'scomplement adder and show that it always consumes less power. However, when the number of operands is large (> 26), a tree of fast carry-lookahead adders was found to be faster.

Author

Chetana Nagendra, Robert Michael Owens and Mary Jane Irwin

Publisher

ACM Press

Published

1995

Language

EN