POWER AMPLIFIER CIRCUIT AND COMMUNICATION DEVICE
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United States of America Patent
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Issued Date -
Aug 8, 2024
app pub date -
Apr 18, 2024
filing date -
Dec 8, 2021
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Abstract
A power amplifier circuit includes a power supply terminal and an amplifier transistor that has a base terminal, a collector terminal connected to the power supply terminal, and an emitter terminal and that performs power amplification of a radio-frequency input signal input through the base terminal to output a radio-frequency signal subjected to the power amplification from the collector terminal. The amplifier transistor receives first bias current via the base terminal assuming a first power supply voltage is applied to the power supply terminal and receives second bias current smaller than the first bias current via the base terminal assuming a second power supply voltage higher than the first power supply voltage is applied to the power supply terminal.
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