Splitter circuit

US7388885B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventors

• Bernd Heise · Munich, DE
• Heinrich Schenk · Munich, DE
• Christian Wolff · Monheim, DE

Key dates

• Filing date: Sep 25, 2002
• Grant date: Jun 17, 2008
• Expiry date: Sep 25, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2213/13322
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A splitter circuit (19) serves to combine on the transmission side signals which are to be transmitted in different frequency bands (A-C), as well as to separate on the reception side these signals which are transmitted in different frequency bands. For this purpose, the splitter circuit (19) has a circuit section (13) designed as purely passive, for the rough signal and impedance separation, as well as the filters (3, 4; 9, 10) allocated to the individual transmission and reception sections, for the exact filtering out of the individual signal in each case. These separate filters (3, 4; 9, 10) are arranged in the transmission direction upstream of a corresponding four-wire/two-wire conversion, and in the reception direction downstream of a corresponding two-wire/four-wire conversion, so that the signal stream takes place via these filters in one direction only, and the filters can be designed as purely active filters or digital filters. In particular, the filters (3, 4; 9, 10) can be dimensioned as of high Ohmic resistance in the reception path, in order to reduce the power consumption.