The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Jul. 29, 2008

Filed:

Mar. 22, 2004
Applicants:

Junichi Naoi, Tokyo, JP;

Tomohiro Ohto, Tokyo, JP;

Inventors:

Junichi Naoi, Tokyo, JP;

Tomohiro Ohto, Tokyo, JP;

Assignee:
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 12/50 (2006.01);
U.S. Cl.
CPC ...
Abstract

A small cost-effective crossbar switch is provided. A switch circuit is disposed in each of a plurality of nodes which are cascade connected with each other in a plurality of stages. Each switch circuit receives from a node of a previous stage a designated address to specify directly or indirectly the relative position in which a target switch circuit is present, determines whether the designated address represents a specific value '0'. When it is determined that the specific value is represented, each switch circuit allows data output to a node-out line, decrements the received designated address by '1' to generate a new designated address, and supplies this new designated address to a node of the subsequent stage.


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