Birch, Stewart, Kolasch & Birch, LLP
Envelope tracking power amplifier module and envelope tracking method for the same
An envelope tracking power amplifier module and an envelope tracking method are provided. The envelope tracking power amplifier module includes a power amplifier and a linear amplifier coupled to the power amplifier and configured to receive and amplify an envelope signal and provide the amplified envelope signal to the power amplifier. The power amplifier is configured to receive and amplify a signal according to the amplified envelope signal. The envelope tracking method includes: providing a signal to the power amplifier; deriving an envelope phase of the signal, the envelope phase corresponding to an output power of the power amplifier; providing an envelope signal including the envelope phase to the envelope tracking module; the envelope tracking module providing the amplified envelope signal to the power amplifier; and the power amplifier amplifying the signal according to the amplified envelope signal and outputting the amplified signal at the output power.
IWAVE TECHNOLOGIES CO., LTD.
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Shau-Gang Shih-Ping Yu-Yao Wei-Ting Chien-Bang Zheng-An Chong-Yi
Mao Huang Chen Tsai Chen Peng Liou