Doherty amplifier with improved linearity
US7427895B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2006 |
| Grant date | Sep 23, 2008 |
| Priority date | — |
| Expiry date | Feb 14, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/602
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A first control unit controls a bias applied to the peak amplifier to (a) make a peak amplifier operate as class C when the level of the input signal is lower than a first threshold value, to (b) make the peak amplifier operate as class AB with a second conduction angle substantially equal to a first conduction angle, when the level of the input signal is higher than a second threshold value higher than the first threshold value, and to (c) make the peak amplifier operate as class AB with a third conduction angle smaller than the first conduction angle, when the level of the input signal is not less than the first threshold value and not more than the second threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.