Power amplifier operated as an envelope digital to analog converter with digital pre-distortion
US6255906A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Sep 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2201/3233
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifier that amplifies an electrical signal that is passed through a power amplification array. The power amplifier is employed in various applications including cellular telephones, radio frequency signal transmission, and other electrical signal applications requiring power amplification. The power amplifier contains a number of power amplifiers arranged in a power amplifier array. To reproduce a particular envelope profile, a selected number of the power amplifiers of the power amplifier array is switched ON, whereas another selected number of the power amplifiers of the power amplifier array are switched OFF. All elements are fed with an RF signal containing phase information as well. The amplified, output signal provided after the power amplifier array is fed to an antenna for signal transmission. Impedance matching circuitry is employed between the power amplifier array and the antenna to provide efficiency for those applications having low power budgets or seeking to operate with extremely high efficiency. The present invention provides a solution that is extremely energy efficient, making it ideally suited for applications having low available power budgets such a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.