Patent ID: 8089906

Claim:
A circuit comprising: a first port for coupling with an external signal source; a first receive coupling path disposed electrically between the first port and a receiver, the first receive coupling path comprising a receive filter; a second receive coupling path disposed electrically between the first port and the receiver, the second receive coupling path other than comprising any filter; a first transmit coupling path disposed electrically between the first port and an amplifier, the first transmit coupling path comprising a transmit filter; a second transmit coupling path disposed electrically between the first port and the amplifier, the second transmit coupling path other than comprising any filter; and, a first switching circuit for in a first switch mode coupling the first port to the receiver via the first receive coupling path and the first port to the amplifier via the first transmit coupling path and for in a second other mode alternately coupling the first port to the receiver via the second receive coupling path and the first port to the amplifier via the second transmit coupling path.