Predistortion circuit, low-distortion power amplifier, and control methods therefor
US6989713B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2005 |
| Grant date | Jan 24, 2006 |
| Priority date | — |
| Expiry date | Apr 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3282
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105. An amplitude difference between low-frequency-side and high-frequency-side distortion voltages is adjusted by the amplitude frequency characteristic adjustment circuit 106, and then their amplitudes and phases are adjusted by a vector adjustment circuit 107. This configuration makes it possible to suppress simultaneously both of low-frequency-side and high-frequency-side distortion voltages of a distortion generated by a wide-band class-AB power amplifier even if they are different in amplitude and phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.