Patent ID: 7449977

Claim:
An electrical circuit comprising: an antenna connection for receiving a signal; a first signal path connected to the antenna connection; a filter arranged in the first signal path; a first gate circuit and a second gate circuit connected in series, the first gate circuit being connected to the antenna connection, the second gate circuit being arranged between the first gate circuit and the filter; wherein the first and second gate circuits each comprises an impedance transformer arranged in the first signal path and a shunt circuit connected to ground, the shunt circuit comprising a switch element and a capacitor, wherein 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, and, wherein the first signal path comprises a common signal path and first and second partial signal paths, the first and second partial signal paths being connected to the common signal path, the common signal path comprising the first gate circuit, and the first partial signal path comprising the second gate circuit and the filter.