A NEW DESIGN FOR A LOOKAHEAD CARRY GENERATOR

Authors
KWAN H NELSON RL SWARTZLANDER EE
Citation
H. Kwan et al., A NEW DESIGN FOR A LOOKAHEAD CARRY GENERATOR, Journal of VLSI signal processing systems for signal, image, and video technology, 14(3), 1996, pp. 295-302
Citations number
8
Categorie Soggetti
Computer Sciences, Special Topics","Engineering, Eletrical & Electronic","Computer Science Information Systems
Journal title
Journal of VLSI signal processing systems for signal, image, and video technology → ACNP
ISSN journal
13875485
Volume
14
Issue
3
Year of publication
1996
Pages
295 - 302
Database
ISI
SICI code
1387-5485(1996)14:3<295:ANDFAL>2.0.ZU;2-8
Abstract
We propose a new scheme for the Texas Instruments SN54182/SN74182 look ahead-carry generator. The SN54182/SN74182 provides a redundant carry output, C-n+x. Our redesign provides an alternative to the original de sign that improves the performance of adder implementations. We analyz e gate delays of lookahead adders with sizes of 16, 32, and 64 bits. W e examine both CMOS-ASIC vendor technology and standard TTL implementa tions. In all cases, gate delays of sum and carry bits are improved. W e also include a layout of our new lookahead-carry generator.