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:
Aug. 09, 2011
Filed:
Jun. 29, 2004
George R. Bailey, Gaitersburg, MD (US);
Terry Zhou, Germantown, MD (US);
George R. Bailey, Gaitersburg, MD (US);
Terry Zhou, Germantown, MD (US);
Spirent Communications, Inc., Sunnyvale, CA (US);
Abstract
A system for identifying characteristics of communication circuit devices in a communication circuit includes a stimulus signal generator configured to generate a stimulus signal at a plurality of amplitudes for the communication circuit devices. At least one of the plurality of amplitudes exceeds a first predetermined threshold. At least one communication circuit device is configured to generate a signature signal in response to the stimulus signal when the stimulus signal exceeds the first predetermined threshold. The system includes an evaluation device configured to evaluate at least one intermodulation distortion (IMD) product of the signature signal generated by the at least one communication circuit device, and to identify a class of the at least one communication circuit device according to a transition level of an amplitude of the at least one IMD product of the signature signal that exceeds a second predetermined threshold.