Band-pass filter circuit and multiplexer

A multiplexer, comprising a band-pass filter circuit, wherein

• the band-pass filter circuit comprises an electromagnetic LC filter circuit and acoustic resonance circuits;
• at least one first acoustic resonance circuit of the acoustic resonance circuits each comprises at least one first acoustic resonator and at least one second acoustic resonator;
• the at least one first acoustic resonator is connected in series between a first terminal of the band-pass filter circuit and a first terminal of the electromagnetic LC filter circuit;
• each of the at least one second acoustic resonator is connected to a terminal of the at least one first acoustic resonator, wherein the first terminal of the band-pass filter circuit serves as an input terminal or output terminal of the band-pass filter circuit;
• one or more of the acoustic resonance circuits are connected on an input side of the electromagnetic LC filter circuit;
• and
• the remaining one or more of the acoustic resonance circuits are connected on an output side of the electromagnetic LC filter circuit.