Automatic current reduction biasing technique for

专利名称：Automatic current reduction biasing

technique for RF amplifier

发明人：Mark Doherty,Anthony Quaglietta,Greg

Yuen

申请号：US10819921申请日：20040408公开号：US069918B2公开日：20060214

专利附图：

摘要：A power amplifier (PA) circuit is disclosed that comprises a PA output stagehaving a first amplifying portion having a first gain portion and disposed in parallel with a

second amplifying portion having a second gain portion, the PA output stage having anoutput stage gain, an input port for receiving of a RF input signal. A second RF powerdetector is provided for detecting a signal power of the RF input signal and for providinga second detected signal. An at least a biasing circuit is provided for biasing the firstamplifying portion and the second amplifying portion in dependence upon the seconddetected signal for amplifying the RF input signal such that for the output stage gain theratio between the first gain portion and the second gain portion varies in dependenceupon the second detected signal.

申请人：Mark Doherty,Anthony Quaglietta,Greg Yuen

地址：Westford MA US,North Andover MA US,Harlow GB

国籍：US,US,GB

代理机构：Kenyon & Kenyon

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