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Match Address Detection Technique for Content-Addressable Memory

IP.com Disclosure Number: IPCOM000058612D
Original Publication Date: 1988-Nov-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Lopez, F Omet, D [+details]

Abstract

This disclosure describes a match line detection circuit used in a Content-Addressable Memory (CAM), associated with new timing circuits. Special features of these circuits are their accuracy and their tolerance to process/environment variations, such as temperature, power supply, etc. During a search operation, when an identical word to the searched one is found in the CAM, a match occurs. This event is detected through the match line detector which drives the word line encoder in order to carry out the corresponding match address bits. (Image Omitted) 1. Match Line Detector (MLDET) In order to understand the function realized by the Match Line Detector (MLDET), one has to call the principle of a CAM cell (Fig. 1) and its behavior during a search.