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.
Patent No.:
Date of Patent:
Nov. 17, 2009
Filed:
Jul. 06, 2006
Eric Barr Kushnick, Santa Clara, CA (US);
Eric Barr Kushnick, Santa Clara, CA (US);
Advantest Corporation, Tokyo, JP;
Abstract
A loopback module is disclosed in which N differential High Speed Serial (HSS) digital data input channels are received and sent to a serial to parallel converter, whose output is M-bit wide parallel data. By doing so, the effective data rate is divided down by M to 1/M 'fabric' speeds. If the channels contain an embedded clock, the clock is extracted. The parallel data is then sent to a non-blocking crossbar switch, which is able to route any of the N M-bit parallel data inputs to any of Q parallel data outputs by effectively utilizing one multiplexer for each parallel output. Each parallel data output of the crossbar is sent to a parallel to serial converter, whose output is a high speed serial output. Each high speed serial output is fed into a jitter generator circuit, and then to an output driver.