Power amplifier filter for radio-frequency signals
US7973620B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2010 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Jul 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/60
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifier filter for radio-frequency signals having an outphasing type architecture comprising a first stage (2) capable of generating, from an input signal s(t), two signals s1(t), s2(t) having an identical amplitude but phase shifted relative to each other, a second amplifier stage (3) for said signals s1(t), s2(t), and a third recombining stage (4) capable of summing the two signals s′1(t), s′2(t) obtained from second stage (3), characterized in that recombining stage (4) includes an assembly of acoustic wave resonators coupled to each other, some of these resonators referred to as “input resonators” being connected to the outputs of second stage (4) and others of these resonators referred to as “output resonators” being connected to the output terminals of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.