Patent ID: 9035726
Filing Date: 2015-05-19
Classification: H03H

Abstract:
1. A surface acoustic wave (SAW) filter circuit, comprising: a first signal port; a second signal port; a DMS (dual mode SAW) filter on a piezoelectric substrate having a first DMS port and at least one first DMS transducer interconnected with the first DMS port and a second DMS port with at least one second DMS transducer interconnected with the second DMS port; and a first interconnection comprising a first series interconnection comprising SAW resonators that are interconnected between the first signal port and the first DMS port and a parallel interconnection comprising SAW resonators that are interconnected in a parallel branch, wherein a static capacitance of the first series interconnection is at most four times a static capacitance of the at least one first DMS transducer; wherein directly adjacent electrode fingers of different transducers comprise a same polarity, and wherein a multi-port resonator is interconnected in the parallel branch of the first interconnection.