Patent ID: 8786384

Claim:
A radio frequency band reject filter comprising: an input port; an output port; a plurality of acoustic resonators coupled between the input port and the output port, wherein the plurality of acoustic resonators comprise a first plurality of acoustic resonators and a second plurality of acoustic resonators; and an inductor positioned within the band reject filter, and comprising: a first terminal coupled to ground; and a second terminal coupled to a common node between the first plurality of acoustic resonators and the second plurality of acoustic resonators, wherein a static capacitance between the input port and the common node is substantially equivalent in value to a static capacitance between the output port and the common node; wherein a combined impedance of the inductor and the plurality of acoustic resonators is equivalent in value to at least one of: an impedance of the radio frequency band reject filter from the input port to ground; or an impedance of the radio frequency band reject filter from the output port to ground.