Linearity and noise improvement for multilevel power amplifier systems using multi-pulse drain transitions
US9768731B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2015 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Dec 14, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/045
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Described embodiments provide a radio frequency (RF) amplifier system having at least one amplifier. The at least one amplifier includes an RF input port, an RF output port and a drain bias port. At least one voltage modulator is coupled to the bias port of the least one amplifier to provide a bias voltage. The bias voltage is selected by switching among a plurality of discrete voltages. At least one filter circuit is coupled between the at least one voltage modulator and the at least one amplifier. The at least one filter circuit controls spectral components resultant from transitions in the bias voltage when switching among the plurality of discrete voltages. A controller dynamically adapts at least one setting of the at least one voltage modulator by using multi-pulse transitions when switching among the plurality of discrete voltages for a first operating condition of the RF amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.