Patent ID: 9172404
Filing Date: 2015-10-27
Classification: H04B

Abstract:
1. Switching circuitry for a mobile terminal having a Time Division Multiple Access (TDMA) mode of operation and a Frequency Division Duplex (FDD) mode of operation comprising: resonant tank circuitry having a controllable resonant frequency controlled by at least one control signal and an output coupled to an antenna; at least one receive path switch adapted to couple at least one receiver front end to an input of the resonant tank circuitry when the mobile terminal is in a receive mode during TDMA operation; at least one transmit path switch adapted to couple at least one transmit circuit to the input of the resonant tank circuitry when the mobile terminal is in a transmit mode during TDMA operation; and a FDD switch adapted to couple a FDD transceiver to the output of the resonant tank circuitry during FDD operation; wherein the at least one control signal is provided such that the resonant tank circuitry substantially isolates the at least one receive path switch and the at least one transmit path switch from the antenna during FDD operation.