Multimode operation for differential power amplifiers
US9564860B2 · kind B2 · utility
1Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2015 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Jun 26, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0408
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An RF circuit for wireless devices comprises a single differential power amplifier and an impedance balancing circuit for each frequency band. The impedance balancing circuit serves both to provide an appropriate impedance at the output of the amplifier as the operating mode of the device changes, and also transforms the differential output of the amplifier to a single-ended output. The impedance balancing circuit optionally comprises a BALUN circuit and a variable capacitor that is varied as the operating mode changes in order to vary the impedance at the output of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.