Patent · US Expired

Filter circuit with a filter stage and balun on a single substrate

US7199684B2 · kind B2 · utility

20Cited by

10References

13Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Robert Aigner · Winter Garden, US
Juha Ellae · Halikko, FI
Stephan Marksteiner · Putzbrunn, DE
Hans-Jörg Timme · Ottobrunn, DE

Key dates

Filing date	Jan 28, 2005
Grant date	Apr 3, 2007
Priority date	—
Expiry date	Jan 28, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH03H7/42
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A filter circuit comprises a balanced port, an unbalanced port and a substrate. A series circuit of a filter stage and a balun is disposed between the balanced port and the unbalanced port. The balun and the filter stage are formed on the substrate.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.