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Method and apparatus for determining an exact match in a ternary content addressable memory device

  • US 6,539,455 B1
  • Filed: 11/12/1999
  • Issued: 03/25/2003
  • Est. Priority Date: 02/23/1999
  • Status: Expired due to Fees
First Claim
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1. A content addressable memory (CAM) cell comprising:

  • a first memory cell;

    a first compare circuit coupled to the first memory cell;

    a second memory cell for storing mask data for the first memory cell;

    a second compare circuit coupled to the second memory cell;

    a mask circuit coupled to the first compare circuit and the second memory cell; and

    a mask override circuit coupled to the mask circuit, the mask override circuit operable to override the mask data.

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