FRONT-END CIRCUIT FOR SIMULTANEOUS TRANSMISSION AND RECEPTION OPERATION

摘要

The invention relates to a front-end circuit, in which three signal paths are coupled to a common antenna connection. A filter is arranged in each signal path, which filter is tunable by means of a control circuit in its frequency band. Simultaneous operation in at least one transmission band and at least one reception band is thus made possible over all three filters and the associated signal paths.