发明授权
- 专利标题： Method and apparatus for efficient signal amplification
- 专利标题（中）： 用于有效信号放大的方法和装置
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申请号： US09414279申请日： 1999-10-07
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公开(公告)号： US06252455B1公开(公告)日： 2001-06-26
- 发明人: Christopher Neil Kurby , Joe Martin Smith , Gary Parker English
- 申请人： Christopher Neil Kurby , Joe Martin Smith , Gary Parker English
- 主分类号： H03G320
- IPC分类号： H03G320
摘要：
An amplifier circuit (100) includes a power amplifier (124) that has a modulated power supply input (125). The modulated power supply input (125) is modulated with a signal related to the amplitude of the signal being amplified by the power amplifier (124). The power amplifier (124) is maintained at a substantially constant operating point. The amplifier circuit (100) also includes a feedback path that generates an error signal as a function of the input signal envelope and the output signal envelope. The error signal is integrated and the resulting integrated error signal drives the gain control of a variable gain element (120) in the amplifier chain prior to the power amplifier (124).