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:
Sep. 14, 1999
Filed:
Dec. 10, 1997
Sten Carlsen, R.o slashed.dovre, DK;
Nokia Mobile Phones Limited, Espoo, FI;
Abstract
An interface unit for providing impedance matching with the impedance Z.sub.line between two transmission line terminals and a transmitter/receiver unit connected thereto comprises a current generator for generating an AC current running into the transmission line, a device for sensing the voltage across the two terminals of the transmission line, and a control device receiving a value of the sensed voltage and controlling the current generator in response thereto, so that said current generator supplies an AC current which, together with the voltage across the two terminals of the transmission line, ensures that, seen from the transmission line, the unit has an output impedance corresponding to the transmission line impedance Z.sub.line.