Method and arrangement in a mobile communications system
US8653886B2 · kind B2 · utility
6Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 2009 |
| Grant date | Feb 18, 2014 |
| Priority date | — |
| Expiry date | Nov 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/21145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention is based on the fact that the current output from a DDB controlled amplifier in backoff, i.e. for low amplitudes, is reduced more or less linearly with the amplitude of the signal to be amplified. Therefore, it is enough to use smaller amplifiers which are able to output the necessary RF current. Hence, according to the present invention, the total DDB amplifier is divided into smaller parts that are coupled to the output only when needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.