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:
Oct. 24, 2006
Filed:
Jun. 01, 2004
Herman Joris Casier, Kuurne, BE;
Olivier Latte, Groot-Bijgaarden, BE;
Patrick Wouters, Merchtem, BE;
Daniël Sallaerts, Aarschot, BE;
Herman Joris Casier, Kuurne, BE;
Olivier Latte, Groot-Bijgaarden, BE;
Patrick Wouters, Merchtem, BE;
Daniël Sallaerts, Aarschot, BE;
Alcatel, Paris, FR;
Abstract
A hybrid circuit that couples a broadband modem to a POTS or ISDN telecommunication line (TL) and includes a transformer bridge circuit (TBC) that includes a bridge circuit (BC). The bridge circuit includes four legs formed by impedance matching networks and parts of the transformer, and a differential drive amplifier (DRV) that performs impedance synthesis. A secondary winding (TS) of the transformer is magnetically coupled to the first and the second primary windings and is electrically coupled to the telecommunication line. First and second impedance dividers (Zhin, Zhoutand Zhin, Zhout) are connected to the various nodes to provide outputs to a receive amplifier (RCV). The impedance matching networks (Zm; Zm) include various passive and reactive components that together provide an impedance value selected based upon the line impedance reflected into the primary windings (TP; TP) of the transformer. To perform the impedance synthesis, the drive amplifier (DRV) is a differential drive amplifier having feedback inputs (FB−, FB+) to which the third (C) and fourth (D) nodes are connected.