| 摘要 |
<p>The present invention relates to a LINC out-phasing amplifier system (1) and techniques for reducing amplifier imbalances in the amplifier system (1). An input signal is applied to a modulator (30) that splits the signal into two phasor fragments which are independently amplified in a respective branch amplifier (40, 50) and subsequently combined in an out-phasing combining network (60) into an amplified output signal. A bias system (110, 120, 140) supplies biases to the branch amplifiers (40, 50). The invention reduces the arising amplitude imbalances by independently adjusting the biases experienced by the branch amplifiers (40, 50). Due to this bias adjustment, in operation independent and different biases will be supplied to the branch amplifiers (40, 50) resulting in a cancellation of the amplitude imbalances.</p> |
