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Content associated memory

A memory and content technology, applied in memory systems, instruments, electrical digital data processing, etc., can solve problems such as inability to perform fast access, identification, query, inability to meet the high-speed development requirements of memory performance, and slow work speed. The effect of mature circuit structure, reliable performance and low cost

Inactive Publication Date: 2003-02-12
THE 13TH RES INST OF CHINA ELECTRONICS TECH GRP CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This query mode is directly associated with the address, its working speed is slow, and it cannot perform functions such as fast access, identification, and query, so it is increasingly unable to meet the high-speed development requirements for memory performance.

Method used

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Embodiment Construction

[0017] refer to Figure 1 to Figure 4 , the present invention consists of a memory cell array 1 of M rows×N columns, N columns of mask circuits 2, M rows of priority circuits 3, control circuits 4, pre-charge tube columns 5, sense amplifier circuits 6, bidirectional data Port 7 is composed. Each row in the memory cell array 1 of M rows×N columns constitutes an N-bit storage associative word unit 8, wherein M and N are natural numbers, M rows and N columns can be set arbitrarily, and the embodiment sets M to be 32 rows, and N is 32 columns, each row constitutes a 32-bit storage association word unit 8, and 32 rows constitute a total of 1024 storage association word units 8, each storage association word unit 8 is composed of input and output matching lines L2, L1, input and output word lines W1, W2, Input positive and negative bit lines P1, P2, output positive and negative bit lines P3, P4, figure 2 It is a schematic diagram of the electrical principle structure of each stor...

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Abstract

A content association type memory is composed of MxN memory units, N mask circuits, M priority circuits, controller circuit, precharging transistors, read amplifier circuit, and bidirectional data port. It features that its stored contents are associated with each other, so no need of address code and decode. Its advantages are high reliability, and low cost.

Description

technical field [0001] The invention relates to a content associative memory (CASM for short) in the field of semiconductor devices, which is especially suitable for content storage, table query, pattern recognition, fuzzy query and other functions in equipment such as computers, wireless communications, Internet and monitoring systems Lenovo memory device. Background technique [0002] At present, the memory used in cache, table query, pattern recognition, fuzzy query and other occasions is mainly content addressable memory (CAM for short). The query method of CAM is more complicated. The query data is compared with the data stored in CAM. Send matching signals, then encode these matching signals, and then determine the corresponding address through the address decoder of the memory (RAM for short), and then the corresponding content is read out. This query mode is directly associated with the address, its working speed is slow, and it cannot perform functions such as fast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/00
Inventor 吴洪江廖斌
Owner THE 13TH RES INST OF CHINA ELECTRONICS TECH GRP CORP
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