Doherty power amplifier, and method and device for improving power amplification efficiency of Doherty power amplifier
US8994450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2014 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | May 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/21142
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
One aspect of the present invention provides a method for improving power amplification efficiency of a Doherty power amplifier. The method is applied to a Doherty power amplifier that has two paths of Doherty circuit units connected in parallel. The method includes: when output power of the Doherty power amplifier is within a low out power range, adjusting, by a bias circuit, gate voltages of main power amplifiers and peak power amplifiers in the two paths of Doherty circuit units connected in parallel, in order to cause the peak power amplifiers to be in an off state, and the main power amplifiers in the two paths of Doherty circuit units connected in parallel to be in a main power amplification state and a peak power amplification state respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.