论文部分内容阅读
Using a Volterra series,an explicit formula is derived for the connection between input 3rd-order intercept point and collector bias current(I_(CQ)) in a common-emitter bipolar junction transistor amplifier.The analysis indicates that the larger I_(CQ) is,the more linear the amplifier is.Furthermore,this has been verified by experiment.This study also integrates a method called dynamic bias current for expanding the dynamic range of an LNA(low noise amplifier) as an application of the analysis result obtained above.IMR3(3rd-order intermodulation rate) is applied to evaluate the LNA’s performance with and without adopting this method in this study.
Using a Volterra series, an explicit formula is derived for the connection between input 3rd-order intercept point and collector bias current (I_ (CQ)) in a common- emitter bipolar junction transistor amplifier. The analysis indicates that the larger I_ (CQ) is, the more linear the amplifier is. More than this has been verified experiment. This study also integrates a method called dynamic bias current for expanding the dynamic range of an LNA (low noise amplifier) as an application of the analysis result obtained above .IMR3 (3rd-order intermodulation rate) is applied to evaluate the LNA’s performance with and without adoption this method in this study.