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A Combined Series-Parallel Hybrid Envelope Amplifier for Envelope Tracking Mobile
提出了一种改进的包络跟踪射频功率放大器架构，结合两个开关放大器和线性放大器，实现高效宽带操作。
82%效率，10MHz LTE信号，6dB PAPR，29.7dBm输出功率，63dBc SFDR
包络跟踪射频功率放大器开关放大器线性放大器CMOS
▸结合两个开关放大器和线性放大器
▸第二开关放大器为线性放大器提供可变电源以减少功耗
▸在150nm CMOS工艺中实现
Abstract
An improved envelope ampli fier architecture for en-
velope tracking RF power amplifiers is presented, consisting of two
switching ampli fiers and one linear ampli fier. The first switching
amplifier and the linear ampli fier provide wideband and high-ef fi-
ciency operation, while the second switching ampli fier provides a
reduced bandwidth variable supply to the linear ampli fier to fur-
ther reduce power loss. The first switching amplifier and the linear
amplifier are fabricated together in a 150 nm CMOS