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Segmented Match-Line and Charge-Sharing Based Low-Cost TCAM

Authors
Minseob ShimJunwon JeongJunyoung SongYongtae KimWoong Choi
Issue Date
Dec-2022
Publisher
Institute of Electrical and Electronics Engineers Inc.
Keywords
CAM; Couplings; Delays; Discharges (electric); Logic gates; low-power; segmented ML; Sensors; Switches; TCAM; Topology
Citation
IEEE Transactions on Circuits and Systems II: Express Briefs, v.69, no.12, pp 5104 - 5108
Pages
5
Journal Title
IEEE Transactions on Circuits and Systems II: Express Briefs
Volume
69
Number
12
Start Page
5104
End Page
5108
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/152272
DOI
10.1109/TCSII.2022.3202605
ISSN
1549-7747
1558-3791
Abstract
This paper presents a segmented match-line (ML) and charge-sharing based search scheme for low-cost ternary contents addressable memory (TCAM). In the proposed TCAM, a first-round search operation is performed on half cells located in even columns. During the first-round search, most of the mismatch cases are filtered out while remaining few mismatched cases that is misrecognized as the matched case. To complete the search operation in a low-power manner, a charge-sharing between the segmented MLs is used for the second-round search operation. The proposed 16KB 16T-NOR TCAM macro has been implemented using a 28nm CMOS technology. Numerical results show that the proposed TCAM improves sensing delay up to 5.6x faster and saves search energy-delay-product by 83% compared to the conventional approaches. IEEE
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첨단소재·전자융합공학부 (지능형전자시스템전공)
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