发明名称 |
Akustisch gekoppelter Filmtransformator mit erhöhter Gleichtaktunterdrückung |
摘要 |
The acoustically-coupled transformer includes first and second stacked bulk acoustic resonators (SBARs), each having a stacked pair of film bulk acoustic resonators (FBARs) with an acoustic decoupler between them. In one embodiment, the acoustic decoupler comprises a layer of decoupling material has having a nominal thickness equal to an odd integral multiple of one quarter of the wavelength of an acoustic wave having a frequency equal to the transformer's center frequency. In another embodiment, the acoustic decoupler comprises a Bragg stack. Each FBAR has opposed planar electrodes with piezoelectric material between them. The transformer additionally has first terminals, second terminals, a first electrical circuit connecting one FBARs of the first SBAR to one FBAR of the second SBAR and the first terminals, and a second electrical circuit connecting the other FBAR of the first SBAR to the other FBAR of the second SBAR and the second terminals. |
申请公布号 |
DE112004002038(B4) |
申请公布日期 |
2010.06.02 |
申请号 |
DE20041102038T |
申请日期 |
2004.10.29 |
申请人 |
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. |
发明人 |
LARSON III, JOHN D.;ELLIS, STEPHEN L.;SARKESIK, NAGHMEH |
分类号 |
H03H9/17;H03H9/205;H01L41/107;H03H9/10;H03H9/13;H03H9/60 |
主分类号 |
H03H9/17 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|