Title :
Low power carry lookahead adder by using dependency between generation and propagation
Author :
Kim, Dongho ; Ambler, Tony
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
The adder is the most important and basic circuit component in the computer arithmetic area. Among the various kinds of adders, the CLA (Carry Lookahead Adder) is generally considered the fastest and most complex adder. The complexity is closely related to power consumption, and a more complex one may require more power consumption. In this paper, we explore the relationship between the generation signal and the propagation signal of the CLA, and we present a low power consumption CLA by taking advantage of the conditional don´t care that exists in the generation and propagation signals. Our results show that this proposed CLA can reduce switching activity by 9-11% comparing to a conventional CLA
Keywords :
adders; carry logic; integrated logic circuits; logic design; low-power electronics; CLA; computer arithmetic; generation signal; low power carry lookahead adder; low power consumption; propagation signal; switching activity reduction; Adders; Circuits; Digital arithmetic; Energy consumption; Equations; Logic design; Logic devices; Power generation; Signal generators; Voltage;
Conference_Titel :
Devices, Circuits and Systems, 2000. Proceedings of the 2000 Third IEEE International Caracas Conference on
Conference_Location :
Cancun
Print_ISBN :
0-7803-5766-3
DOI :
10.1109/ICCDCS.2000.869814
