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:
Apr. 22, 2008
Filed:
Nov. 03, 2004
David Walker Guidry, Rowlett, TX (US);
David Walker Guidry, Rowlett, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
System and method for testing differential signal crossover in high-speed electronic equipment. A preferred embodiment comprises a test circuit coupled to a device under test (DUT) and an automatic test equipment (ATE). The test circuit comprises a pair of window comparators coupled to a differential mode signal from the DUT, each window comparator configured to compare one of two signals making up the differential mode signal with a voltage boundary when enabled by an enable signal. The ATE is configured to provide clock signals to the test circuit and the DUT and to process data produced by the test circuit to determine if the differential signal crossover meets timing constraints. The test circuit uses undersampling to enable testing of high frequency signals without requiring an extremely high sampling rate.