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. 19, 2002
Filed:
Jun. 29, 2001
Charles Michael White, Escondido, CA (US);
Barry James Smith, Oceanside, CA (US);
Ideal Industries, Inc., Sycamore, IL (US);
Abstract
A LAN cable tester circuit is disclosed having measurement end circuit components and shorting end circuit components. The measurement end circuit components are conventional and include a multiplexer having a current source and voltage sensing circuitry electrically coupled thereto. The multiplexer also has a plurality of pairs of associated electrical conductors included in the cable under test coupled thereto. The shorting end circuit components include another multiplexer having the opposite ends of the electrical conductors coupled thereto, and further having a differential voltage amplifier and two current output differential amplifiers electrically coupled thereto. The shorting end circuit components provide for an active short that eliminates the effect of the on-resistance attributable to semiconductor integrated circuit multiplexers.