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RADIO-FREQUENCY SIGNAL AMPLIFIER CIRCUIT, POWER AMPLIFIER MODULE, FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
RADIO-FREQUENCY SIGNAL AMPLIFIER CIRCUIT, POWER AMPLIFIER MODULE, FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
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机译:射频信号放大器电路,功率放大器模块,前端电路和通信设备
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摘要
A radio-frequency signal amplifier circuit that is used in a front-end circuit configured to propagate a radio-frequency transmission signal and a radio-frequency reception signal, includes an amplifier transistor configured to amplify the radio-frequency transmission signal, a bias circuit configured to supply a bias to a signal input terminal of the amplifier transistor, a resistor having one end connected to the bias circuit and the other end connected to the signal input terminal, and an LC series resonance circuit that has one end connected to a node n1 between the resistor and the signal input terminal and the other end connected to a grounding terminal. A resonant frequency fr of the LC series resonance circuit is included in a difference frequency band between the radio-frequency transmission signal and the radio-frequency reception signal.
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