Composite amplifier with optimized linearity and efficiency
US6897721B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 2002 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Apr 28, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to a composite amplifier (500) based on a main amplifier (510) and an auxiliary amplifier (520), and compensation for non-linear amplifier behavior by means of respective non-linear models (570, 575) of parasitic. In order to provide proper excitation of the non-linear models, a filter network (560) based on a linear model of the output network of the composite amplifier is provided. The linear filter network (550) basically determines ideal output node voltages, which are used as input to the respective non-linear models for generating appropriate compensation signals. The compensation signals are finally merged into the input signals of the respective sub-amplifiers (510, 520), thus effectively compensating for the effects of the non-linear parasitics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.