Apparatus and methods for envelope shaping in power amplifier systems
作者： Cyrille Rio , Sabah Khesbak
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摘要: Apparatus and methods for envelope shaping in power amplifier systems are provided. In certain implementations, a system includes modulator generating RF signal, amplifying the gain control circuit controlling of amplifier, an tracking voltage level amplifier's supply based on signal corresponding to signal's envelope. The adjustment table, including isodistortion table. table can be used map shaped so as maintain substantially constant distortion system's transmit and/or receive bands across range.
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