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High frequency power amplifier, high frequency power amplifier module, and portable telephone
High frequency power amplifier, high frequency power amplifier module, and portable telephone
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机译:高频功率放大器,高频功率放大器模块和便携式电话
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摘要
To provide a small-sized high frequency power amplifier for preventing oscillation by a small number of switching circuits and outputting high power and low power with high efficiencies, a high frequency power amplifier module and a portable telephone, the high frequency power amplifier is constituted by an amplifying circuit A and an amplifying circuit B connected in parallel, a size of a transistor at an output stage of the amplifying circuit B is made to be equal to or smaller than ¼ of a size of a transistor of an output stage of the amplifying circuit A and a switching circuit is connected between a signal line forward from the output stage of the amplifying circuit A and a ground terminal.
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