CAM cells and differential sense circuits for content addressable memory (CAM)

  • US 6,744,653 B1
  • Filed: 07/24/2002
  • Issued: 06/01/2004
  • Est. Priority Date: 10/04/2001
  • Status: Expired due to Term
First Claim
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1. A content addressable memory (CAM) cell comprising:

  • a memory cell operable to store a bit value; and

    a comparison circuit coupled to the memory cell and configured to detect the bit value stored in the memory cell, the comparison circuit including an output transistor coupled to a match line and configured to provide a drive for the match line based on the detected bit value, and a dummy transistor coupled to a dummny line and configured to provide a drive for the dummy line based on an inverted detected bit value, wherein the match line and dummy line are used to detect output values provided by other CAM cells also coupled to the match and dummy lines.

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