Patent ID: 8742871

Claim:
An integrated circuit comprising: a bandpass filter having a first capacitor and a second capacitor coupled in parallel with each other, wherein the first capacitor and the second capacitor include inputs; a third capacitor coupled between the first capacitor and the second capacitor at their respective inputs; a first resonator coupled in parallel with the first capacitor and the second capacitor; a second resonator coupled in parallel with the first capacitor and the second capacitor; wherein each of the first and second resonators has an inductor and capacitor coupled in series with one another; and wherein the inductors of the first and second resonators comprise spiral conductors positioned adjacent to one another on the integrated circuit such that the inductors of the first and second resonators are magnetically coupled together, forming a transformer, and wherein the bandpass filter has a transmission/attenuation transfer characteristic having three (3) transmission zeros.