Patent ID: 7825748
Filing Date: 2010-11-02
Classification: H03H

Abstract:
1. An acoustic resonant circuit integrated in a semiconductor product including a bulk acoustic wave (BAW)-type resonator having first and second resonant frequencies, the acoustic resonant circuit comprising: a first substrate, of an integrated passive device and active devices (IPAD)-type, made of glass, including an inductive resistor having first and second input terminals to cancel the second resonant frequency; a second substrate including a first capacitive adjustment element to enable tuning of said resonator to said first resonant frequency; and a four-pole circuit having first and second input terminals respectively coupled to the first and second terminals of the inductive resistor and having first and second output terminals, the four-pole circuit including a first plurality of resonators that includes the BAW-type resonator; an inductive element having first and second terminals respectively coupled to the first and second output terminals of the four-pole circuit; and a second capacitive adjustment element having a first terminal coupled to the first terminal of the inductive element and having a second terminal, wherein the first plurality of resonators have the second resonant frequency.