The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2008
Filed:
Oct. 06, 2005
Tiberiu Jamneala, San Francisco, CA (US);
Michael Louis Frank, Menlo Park, CA (US);
Paul D Bradley, Los Altos, CA (US);
Tiberiu Jamneala, San Francisco, CA (US);
Michael Louis Frank, Menlo Park, CA (US);
Paul D Bradley, Los Altos, CA (US);
Avago Wireless IP Pte Ltd, Singapore, SG;
Abstract
A film acoustically-coupled transformer (FACT) has a first and a second stacked bulk acoustic resonator (SBAR, SBAR). Each SBAR has a stacked pair of film bulk acoustic resonators (FBARs) and an acoustic decoupler between the FBARs. Each FBAR has opposed planar electrodes and a layer of piezoelectric material between the electrodes. A first electrical circuit connecting one of the FBARs of SBARto one of the FBARs of SBARand a second electrical circuit connecting the other of the FBARs of SBARto the other of the FBARs of SBAR. The first electrical circuit connects the respective FBARs in parallel and second electrical circuit connects the respective FBARs in series. A shunt inductor is included from the reception path to ground.