公开(公告)号：US06838938B2

公开(公告)日：2005-01-04

申请号：US10481984

申请日：2003-07-03

申请人： Tirdad S. H. Sowlati ,  Dominicus Martinus Wilhelmus Leenaerts

发明人： Tirdad S. H. Sowlati ,  Dominicus Martinus Wilhelmus Leenaerts

IPC分类号： H03G3/30 ,  H03F1/02 ,  H03F3/45 ,  H03G3/00 ,  H03G3/20

CPC分类号： H03F3/45085 ,  H03F1/0261 ,  H03F3/45183 ,  H03F2203/45596

摘要： A communication system comprising a power amplifier coupled to a detector and further coupled to a Bias generator. The detector comprises a controlled amplifier means for generating an output signal (Th_S), the said signal Th_S being indicative for the power of an input signal and having a controllable bias level. The Bias Generator comprises a Level Sensitive Current Generator (LSCG) for generating a current (Cc) controlled by the output signal Th_S. Said LSCG has a threshold level (TL) such that when the output Th_S signal is lower than the TL the current Cc is substantially zero. Otherwise the current Cc is linearly controlled by the signal Th_S. The Bias Generator further comprises an adapter coupled to the LSCG comprising a current controlled adapting means for generating a control signal (C_S) for controlling a property of the amplifier, the control signal C_S having a controllable linear dependency on the current Cc.