Coupled resonator structure

A device comprising:

• a network input and a network output;
• a filter network coupled between the network input and the network output and comprising a plurality of coupled resonator structures (CRSes) that are electrically coupled together to form a ladder network, wherein each coupled resonator structure (CRS) comprises:
• a substrate;
• a bottom transducer comprising a first bottom electrode over the substrate, a first piezoelectric layer over the first bottom electrode, and a first top electrode over the first piezoelectric layer;
• a first acoustic coupling structure over the bottom transducer;
• and
• a top transducer over the first acoustic coupling structure and comprising a second bottom electrode, a second piezoelectric layer over the second bottom electrode, and a second top electrode over the second piezoelectric layer, wherein the bottom transducer is vertically acoustically coupled to the top transducer via the first acoustic coupling structure,
• wherein an arrangement of a first CRS of the plurality of CRSes comprises a second arrangement, and an arrangement of a second CRS of the plurality of CRSes is one of a first arrangement, a third arrangement, and a fourth arrangement, wherein:
• in the first arrangement, the second top electrode is a first terminal, the first bottom electrode is a second terminal, and the first top electrode is directly electrically coupled to the second bottom electrode to provide a third terminal of a first three terminal device;
• in the second arrangement, the second top electrode is a fourth terminal, the first top electrode is a fifth terminal, and the first bottom electrode is directly electrically coupled to the second bottom electrode to provide a sixth terminal of a second three terminal device;
• in the third arrangement, the first bottom electrode is directly electrically coupled to the second top electrode to provide a seventh terminal and the first top electrode is directly electrically coupled to the second bottom electrode to provide an eighth terminal of a first two terminal device;
• and
• in the fourth arrangement, the first bottom electrode is directly electrically coupled to the second bottom electrode to provide a ninth terminal and the first top electrode is directly electrically coupled to the second top electrode to provide a tenth terminal of a second two terminal device.