Transceiver and communication device

摘要

A transceiver comprising a transmitter, a receiver and a signal transmission arrangement is disclosed. The signal transmission arrangement is arranged to transmit signals provided from the transmitter, and arranged to receive signals and provide them to the receiver. The transceiver further comprises a first signal transferring element arranged between the transmitter output and the signal transmission arrangement, wherein the first signal transferring element has input impedance towards an output of the transmitter and output impedance towards the signal transmission arrangement such that a signal from the output of the transmitter is enabled to reach the signal transmission arrangement through the first signal transferring element, and a signal from the signal transmission arrangement is disabled to reach the output of the transmitter through the first signal transferring element. The transceiver further comprises a transformer comprising a first winding and a second winding being mutually magnetically connected, wherein the first winding is electrically connected in a circuit path which is connected in parallel to the first signal transferring element, and the second winding is connected to an input of the receiver. The first signal transferring element is arranged to transfer signals from the transmitter to the signal transmission arrangement such that the transmitter contribution to the signal in the first winding is suppressed.