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公开(公告)号:US08614601B2
公开(公告)日:2013-12-24
申请号:US13908135
申请日:2013-06-03
发明人: Ikuma Ota , Hiroaki Inose , Shun Imai
IPC分类号: H03F1/14
CPC分类号: H03F3/193 , H03F1/0277 , H03F1/565 , H03F3/191 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/111 , H03F2203/7209 , H04B1/0458 , H04B1/0483
摘要: A power amplifier includes a first amplifier and a second amplifier which include large and small size elements. An RF input signal is amplified by the first and second amplifiers. An output of the first amplifier is connected to an input of a first output matching circuit. An output of the second amplifier is connected to an input of a second output matching circuit. An output of the second output matching circuit is connected to an RF signal output terminal. In a high power state, the RF input signal is amplified by the first amplifier. In a low power state, the RF input signal is amplified by the second amplifier. In amplification with low power and high frequency, reactances of the second output matching circuit are set at predetermined values. In amplification with low power and low frequency, the reactances of the second output matching circuit are set at larger values.
摘要翻译: 功率放大器包括第一放大器和包括大尺寸和小尺寸元件的第二放大器。 RF输入信号被第一和第二放大器放大。 第一放大器的输出端连接到第一输出匹配电路的输入端。 第二放大器的输出连接到第二输出匹配电路的输入端。 第二输出匹配电路的输出连接到RF信号输出端。 在高功率状态下,RF输入信号由第一放大器放大。 在低功率状态下,RF输入信号由第二放大器放大。 在低功率和高频率的放大中,第二输出匹配电路的电抗被设定为预定值。 在低功率和低频率的放大中,第二输出匹配电路的电抗被设定为更大的值。