Transversely-excited film bulk acoustic resonator matrix filters with switches in parallel with sub-filter shunt capacitors
US11476834B2 · kind B2 · utility
10Cited by
67References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2021 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Jul 14, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/706
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
There are disclosed matrix filters having an input port and sub-filters connected between the input port and respective output ports. Each of the sub-filters includes a ladder circuit with n transversely-excited film bulk acoustic resonator (XBAR) series elements and n−1 capacitor shunt elements, where n, the order of the sub-filter, is an integer greater than 2. Each sub-filter further has a first switch in parallel with a first capacitor shunt element and a second switch in parallel with a last capacitor shunt element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.