Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6944826 | Microelectronics Journal | 2018 | 9 Pages |
Abstract
This paper presents a high-speed, energy efficient carry select adder (CSLA) dominated by carry generation logics. The proposed architecture is composed of three functional stages - a Primary Carry Unit (PCU), an Intermediate Wave Carry Unit (WCU) and a Final Selection Unit (FSU) - that are partitioned with the appropriate bit-width. We synthesized the blocks with random logic use functional blocks for which the input and output consist only of carry functions. The CSLA is partitioned into bit-slice logics to reduce the propagation delay, and we analytically optimized the bit-slice width of the functional blocks. The proposed architecture skips the carry computation in the first stage of each bit-slice block. We used 180â¯nm CMOS technology to implement the proposed CSLA for various input bit widths. The results show that the proposed CSLA reduces the computational delay by 24%, power consumption by 17% and PDP by 37% compared to conventional implementations.
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Physical Sciences and Engineering
Computer Science
Hardware and Architecture
Authors
Minho Nam, Yeonhun Choi, Kyoungrok Cho,