US 2003/0169613 A1 · Signal detection circuit for detecting multiple match in arranged signal lines

Abstract

The present invention relates to a signal detection circuit for detecting the presence or absence of signals having the same logic in a plurality of arranged signal lines, and more particularly to a signal detection circuit suitable for multi-hit detection in a content addressable memory. According to the present invention, the signal detection circuit includes a first signal transmission line to transmit a first signal indicating the presence of two or more logic signals to be detected and a second signal transmission line to transmit a second signal indicating the presence of one or more of the logic signals to be detected. Each of the first and second signal transmission lines includes logic circuits. The signal detection circuit may have a hierarchical structure.

Claims13

Dependent claims

A signal detection circuit for detecting the presence or absence of signals having the same logic in a plurality of arranged signal lines, said circuit comprising:

a first signal transmission line to transmit a first signal indicating the presence of two or more logic signals to be detected, the line including logic circuits;
and
a second signal transmission line to transmit a second signal indicating the presence of one or more of the logic signals to be detected, the line including logic circuits.

A signal detection circuit for detecting the presence or absence of signals having the same logic in a plurality of arranged signal lines, said circuit comprising:

first detection circuits each of which is provided for each group obtained by dividing the signal lines into a plurality of groups in the arrangement order, the first detection circuits including a first signal transmission line to transmit a first signal indicating the presence of two or more logic signals to be detected, and a second signal transmission line to transmit a second signal indicating the presence of one or more logic signal to be detected;
and
second detection circuits including a third signal transmission line to transmit a third signal indicating that the first signal has been transmitted from any one or more of the first detection circuits or that the second signal has been transmitted from two or more of the first detection circuits, and a fourth signal transmission line to transmit a fourth signal indicating that the second signal has been transmitted from any one of the first detection circuits.

Dependencies are inferred from the claim text.

Signal detection circuit for detecting multiple match in arranged signal lines

Life of this patent

Signal detection circuit for detecting multiple match in arranged signal lines

Life of this patent

Abstract

Claims13