High-speed adder design using time borrowing and early carry propagation

Gunok Jung, Gerald E Sobelman

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

This paper presents a novel application of skew-tolerant domino circuit design by combining the effects of time borrowing and early carry propagation in a 64-bit adder. Skew-tolerant circuit design softens the clock edges and allows time borrowing from one stage of logic to the next in a pipeline. Early carry propagation also softens clock edges by allowing useful work to be done during the precharge phase. In this paper, these two effects are used simultaneously, resulting in a significant reduction in latency. Simulation results show that up to a 42% decrease in delay can be achieved over a traditional two-phase clocking design when both techniques are combined in the same circuit.

Original languageEnglish (US)
Pages (from-to)43-47
Number of pages5
JournalProceedings of the Annual IEEE International ASIC Conference and Exhibit
DOIs
StatePublished - Jan 1 2000

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