| 摘要 |
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. |
