Filter circuit, has reactance element electrically switched between connections, and base switching elements electrically switched over inputs and outputs in signal path in parallel manner

摘要

The circuit has a signal path (SP) connecting signal path inputs (SPE) with signal path outputs (SPA). Each of a set of ground connection (MA) has a base switching element (BSE1, BSE2). A series resonator i.e. surface acoustic wave resonator, and parallel resonators are switched between the inputs and the outputs, the inputs and the connections, and the connections and the outputs, respectively. A reactance element is electrically switched between the connections. The switching elements are electrically switched over inputs and outputs in the path in a parallel manner. An independent claim is also included for a method for optimizing a filter circuit.