High-throughput low-energy content-addressable memory based on self-timed overlapped search mechanism

Naoya Onizawa, Shoun Matsunaga, Vincent C. Gaudet, Takahiro Hanyu

研究成果: Conference contribution

21 被引用数 (Scopus)

抄録

This paper introduces a self-timed overlapped search mechanism for high-throughput content-addressable memories (CAMs) with low search energy. Most mismatches can be found by searching the first few bits in a search word. Consequently, if a word circuit is divided into two sections that are sequentially searched, most match lines in the second section are unused. As searching the first section is faster than searching an entire word, we could potentially increase throughput by initiating a second-stage search on the unused match lines as soon as a first-stage search is complete. The overlapped search mechanism is realized using a self-timed word circuit that is independently controlled by a locally generated control signal, reducing the power dissipation of global clocking. A 256 x 144-bit CAM is designed under in 90 nm CMOS that operates with 5.57x faster throughput than a synchronous CAM, with 38% energy saving and 8% area overhead.

本文言語English
ホスト出版物のタイトルProceedings - 2012 IEEE 18th International Symposium on Asynchronous Circuits and Systems, ASYNC 2012
ページ41-48
ページ数8
DOI
出版ステータスPublished - 2012 9 26
イベント2012 IEEE 18th International Symposium on Asynchronous Circuits and Systems, ASYNC 2012 - Copenhagen, Denmark
継続期間: 2012 5 72012 5 9

出版物シリーズ

名前Proceedings - International Symposium on Asynchronous Circuits and Systems
ISSN(印刷版)1522-8681

Other

Other2012 IEEE 18th International Symposium on Asynchronous Circuits and Systems, ASYNC 2012
国/地域Denmark
CityCopenhagen
Period12/5/712/5/9

ASJC Scopus subject areas

  • 電子工学および電気工学

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