Patent ID: 6597594
Filing Date: 2003-07-22
Classification: G11C

Abstract:
A content addressable memory cell comprising:a first storage element for storing information; a first transistor for selectively transferring charge representing information from a first bitline to said first storage element; a second storage element for storing data; a second transistor for selectively transferring charge representing information from a second bitline to said second storage element; a first compareline for carrying a first bit of a comparand; a second compareline for carrying a second bit of said comparand; and a plurality of matchlines each for maintaining a result from a comparison between information stored at said storage elements and a comparand presented on said comparelines; a comparator for comparing said first and second bits of said comparand with information stored on said first and second storage elements and selectively controlling a voltage on a corresponding one of said plurality of matchlines in response.