Patent
Content addressable memory system
Mihoko Wada
- 11 Dec 2012
6
TL;DR: In this paper, a row address register corresponds to each entry of a TCAM array mat and retains each address, and each row of the row address registers correspond to each word line and match line.
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Abstract: There is a need to highly integrate a circuit area of content addressable memory (CAM) and ensure faster operation thereof. A priority encoder and row decoder portion shares a row address register including more than one row. Each row of the row address register corresponds to each entry of a TCAM array mat and retains each address. Each row of the row address register corresponds to each word line and match line of the TCAM array mat. Writing data to the TCAM array mat activates word line for a row retained in the row address register corresponding to a specified address. Searching for the TCAM array mat activates a match line for the TCAM array mat. The row address register for the corresponding row stores the address of an entry for the TCAM array mat matching search data.
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Citations
Patent
Ternary content addressable memory with match line circuit for controlling potential of match realizing higher speed of search access
Yabuuchi Makoto
- 24 Mar 2020
TL;DR: In this article, the authors proposed a content addressable memory to realize higher speed of a search access, which includes a plurality of memory cells, a match line coupled to the plurality, a search line coupled with each of the memory cells and a potential changing circuit coupled with the match line.
References
Patent
Content addressable memory with error detection signaling
Michael E. Ichiriu,Varadarajan Srinivasan +1 more
- 03 Jun 2003
TL;DR: In this article, a content addressable memory (CAM) device having a data CAM array and an error CAM array is described, where the data array is used to store data words, compare the data words with a comparand value, and assert a match signal that corresponds to the matching data word.
97
Patent
Content addressable memory
Naoya Watanabe,Isamu Hayashi,Teruhiko Amano,Fukashi Morishita,Kenji Yoshinaga,Mihoko Akiyama,Shinya Miyazaki,Masakazu Ishibashi,Katsumi Dosaka +8 more
- 13 Mar 2012
TL;DR: In this article, an entry including multiple bits of unit cells each storing data bit is coupled to a match line, and the match line is supplied with a charging current having a restricted current value smaller than a match-line current flowing in a one-bit miss state in one entry, but larger than an all-bit match state in another entry.
54
Patent
Circuit and method for performing variable width searches in a content addressable memory
Peter Gillingham
- 27 Sep 2002
TL;DR: A content addressable memory (CAM) as mentioned in this paper was proposed to generate intermediate search results in a search on a stored data word sequence, where the CAM comprises a plurality of rows of CAM cells each for storing a data word in the data word word sequence; a plurality match lines each coupled to a corresponding CAM cells, each for generating a corresponding match line signal.
49
Patent
Content addressable memory (CAM) devices that utilize segmented match lines and word lines to support pipelined search and write operations and methods of operating same
Kee Park,Scott Yu-Fan Chu +1 more
- 04 Nov 2003
TL;DR: In this article, a segmented CAM array is configured to support a long word search operation (e.g., x8N search) as a plurality of overlapping segment-to-segment search operations that are each performed across different rows within a group of rows in the CAM array and staggered in time relative to one another.
22
Patent
Content addressable memory with multi-row write function
Bindiganavale S. Nataraj,Sandeep Khanna +1 more
- 01 Jul 2004
TL;DR: In this article, a content addressable memory (CAM) device with a multi-row write function was proposed, where a CAM array includes a plurality of CAM cells and word lines coupled to respective rows of the CAM cells.
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