Patent · US Active

Circuit having isolated transmitting and receiving paths

US7449977B2 · kind B2 · utility

4Cited by

2References

31Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Jens Schöning · Herrsching am Ammersee, DE
Peter Hagn · Finsing, DE

Key dates

Filing date	Aug 24, 2005
Grant date	Nov 11, 2008
Priority date	—
Expiry date	Jun 18, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH04B1/525
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An electrical circuit includes an antenna connection for receiving a signal, a first signal path connected to the antenna connection, a filter arranged in the first signal path, and a first and a second gate circuit connected in series. The first gate circuit is connected to the antenna connection, and the second gate circuit is arranged between the first gate circuit and the filter. The first and second gate circuits each includes an impedance transformer arranged in the first signal path and a shunt circuit connected to ground. The shunt circuit includes a switch element and a capacitor. When the switch element is enabled, the shunt circuit defines a ground path through which at least part of the signal can pass to ground.

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