System and method for dynamic drain voltage adjustment to control linearity, output power, and efficiency in RF power amplifiers
US7907014B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2010 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Jun 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/516
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method for dynamic adjustment of drain or collector voltage of a power amplifier (PA), including a PA having a voltage input, a temperature sensor measuring ambient temperature of the PA, and an adaptive PA control processor that dynamically changes the input voltage based on the ambient temperature, achieving a desired peak power when the system is subjected to high temperatures. In a further embodiment, a power sensor measures output power of the PA, and the control processor dynamically changes the voltage based on output power when the system serves a large cell in a mobile communication infrastructure employing high power. In a further embodiment, a multistage PA and method include amplifier stages having drain or collector voltage inputs, wherein a voltage applied to the inputs are set so as to be proportional to the peak power requirements of each stage, enhancing overall efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.