Patent ID: 8406159

Claim:
A circuit comprising: a port electrically coupled to an external signal source; a first receive path configured to electrically couple the port to a receiver amplifier through a receive filter; a second receive path configured to electrically couple the port to the receiver amplifier bypassing the receive filter such that signals propagating along the second receive path are unfiltered; a first transmit path configured to electrically couple a power amplifier to the port through a transmit filter; a second transmit path configured to electrically couple the power amplifier to the port bypassing the transmit filter such that signals propagating along the second transmit path are unfiltered; and a switching circuit configured to switch between a first mode of operation and a second mode of operation, the first mode of operation electrically coupling the port to the receiver amplifier via the first receive path and the power amplifier to the port via the first transmit path, the second mode of operation alternating between electrically coupling the port to the receiver amplifier via the second receive path and electrically coupling the power amplifier to the port via the second transmit path.