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专利名称：RF transmitter employing linear and non-linear pre-correctors
发明人：David Christopher Danielsons申请号：US095990申请日：20000619公开号：US06751266B1公开日：20040615
专利附图：
摘要：A radio frequency (RF) transmitter system is presented having an input circuitfor receiving an RF signal to be amplified and transmitted. A series circuit is providedwhich includes first and second cascaded amplifier networks located downstream from
the input circuit and wherein the first amplifier network is located upstream from thesecond amplifier network and wherein the first and second networks respectively includefirst and second non-linear amplifiers that exhibit non-linear response characteristics tothe RF signal and that introduce non-linear distortions into the RF signal and that thesecond network includes a filter that introduces linear distortions into the RF signal. Thefirst correction circuit is located upstream from the series circuit for pre-correcting theRF signal in a manner to compensate for the linear and non-linear distortions introducedby the second amplifier network. A second pre-correction circuit is interposed betweenthe first correction circuit and the first amplifier network for pre-correcting the RF signalto compensate for the non-linear distortions introduced by the first amplifier network.The second pre-correction circuit includes a third non-linear amplifier selected so as toexhibit a non-linear response characteristic to an applied RF signal similar to that of thefirst amplifier.
申请人：HARRIS CORP
代理机构：Tarolli, Sundheim, Covell & Tummino L.L.P.
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