Power amplifier circuit, power amplifier device, and RF circuit module
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United States of America
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Apr 1, 2025
Grant Date -
Jun 16, 2022
app pub date -
Dec 13, 2021
filing date -
Dec 13, 2021
priority date (Note) -
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Abstract
A power amplifier circuit includes an amplifier transistor which amplifies a radio frequency signal applied to its base and outputs the amplified signal; a resistance element having a first end, and a second end electrically connected to the base of the amplifier transistor; a first bias transistor having a collector to which a first voltage is applied, a base to which a first bias voltage is applied, and an emitter electrically connected to the first end of the resistance element and which supplies a bias current to the base of the amplifier transistor through the resistance element; and a second bias transistor having an emitter electrically connected to the emitter of the first bias transistor and the first end of the resistance element, a base to which a second bias voltage is applied, and a collector to which a second voltage lower than the first voltage is applied.
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