Signal transmission apparatus and power amplification output circuit
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United States of America Patent
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Issued Date -
Aug 15, 2024
app pub date -
Jan 19, 2024
filing date -
Feb 10, 2023
priority date (Note) -
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Abstract
The present disclosure discloses a power amplification output circuit. An output transformer includes a first side inductor and a second side inductor. A cascode power amplifier is electrically coupled to the first side inductor. An inverter-type power amplifier is electrically coupled to the first side inductor. The cascode power amplifier is activated under a normal power output mode to receive, amplify and output a differential radio frequency input signals from cascode differential input terminals to the output transformer through cascode differential output terminals further to an antenna through the second side inductor. The inverter-type power amplifier is activated under a back off power output mode to receive, amplify and output the differential radio frequency input signals from inverter-type differential input terminals to the output transformer through inverter-type differential output terminals further to the antenna through the second side inductor.
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