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Low-power ternary content-addressable memory design using a segmented match line
- Source :
- IEEE Transactions on Circuits and Systems-I-Regular Papers. July, 2008, Vol. 55 Issue 6, p1485, 10 p.
- Publication Year :
- 2008
-
Abstract
- Power consumption in match lines is the most critical issue for low-power ternary content-addressable memory (TCAM) designs. In the proposed match-line architecture, the match line in each TCAM word is partitioned into four segments and is selectively pre-charged to reduce the match-line power consumption. The partially charged match lines are evaluated to determine the final comparison result by sharing the charges deposited in various parts of the partitioned segments. This arrangement reduces the match-line power consumption by reducing effective capacitor loading and voltage swing at match lines. The segmented architecture also enhances operational speed by evaluating multiple segments in parallel and by overlapping the pre-charging and evaluation stages. 512 x 72 TCAM is designed using 0.18-[micro]m CMOS technology. The extracted RC values are used to show the power reduction benefits. The sample design demonstrated that the matchline power consumption using a segmented match line was conservatively 44% of that produced by traditional parallel TCAM. The power savings by segmenting match lines can be up to 41% over a low-voltage swing technique due to the independent discharge capability in segmented match-line architecture. Index Terms--Content-addressable memory (CAM), low-power design, match line, memory architecture.
- Subjects :
- Memory (Computers) -- Design and construction
Memory (Computers) -- Energy use
Complementary metal oxide semiconductors -- Design and construction
Energy management systems -- Technology application
Circuit design -- Evaluation
Technology application
Circuit designer
Integrated circuit design
Semiconductor memory
Business
Computers and office automation industries
Electronics
Electronics and electrical industries
Subjects
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 55
- Issue :
- 6
- Database :
- Gale General OneFile
- Journal :
- IEEE Transactions on Circuits and Systems-I-Regular Papers
- Publication Type :
- Academic Journal
- Accession number :
- edsgcl.182080895