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    • 2. 发明授权
    • Radio transmitter and envelope tracking power supply control method
    • 无线电发射机和信封跟踪电源控制方法
    • US08600321B2
    • 2013-12-03
    • US13477108
    • 2012-05-22
    • Hiroi NambuMasami Ohnishi
    • Hiroi NambuMasami Ohnishi
    • H01Q11/12H04B1/04
    • H04B1/0475H03F1/3223H03F3/24H04B2001/0441
    • The envelope tracking power supply includes a plurality of variable voltage supplies. A power supply controller of a power amplifier controls the plurality of variable voltage supplies so as to precisely divide the power supply voltage in a high frequency area, based on the voltage distribution of a received transmitted base band signal, in order to maximize the power added efficiency of the power amplifier. The power supply controller includes a threshold memory including a plurality of first zones, and a frequency memory including a plurality of second zones. The power supply controller changes the threshold held in the first zones so that each second zone approaches the average of the second zones.
    • 包络跟踪电源包括多个可变电压源。 功率放大器的电源控制器控制多个可变电压源,以便基于所接收的发送的基带信号的电压分布来精确地划分高频区域中的电源电压,以便最大限度地增加功率 功率放大器的效率。 电源控制器包括包括多个第一区域的阈值存储器和包括多个第二区域的频率存储器。 电源控制器改变保持在第一区域中的阈值,使得每个第二区域接近第二区域的平均值。
    • 10. 发明授权
    • Radio frequency power amplifier
    • 射频功率放大器
    • US06943624B2
    • 2005-09-13
    • US10161737
    • 2002-06-05
    • Masami OhnishiHidetoshi MatsumotoTomonori TanoueOsamu KagayaKenji Sekine
    • Masami OhnishiHidetoshi MatsumotoTomonori TanoueOsamu KagayaKenji Sekine
    • H03F3/60H03F1/02H03F1/56H03F3/189H03F3/24H03F3/68H03F1/14H03F3/04
    • H03F1/56H03F1/0277H03F1/565H03F3/602H03F3/72H03F2203/7209
    • The present invention provides a radio frequency power amplifier which may not introduce radio frequency loss during switching power amplifier units between high and low output power levels. By connecting a first-stage matching network M12 and first-stage matching network M13 to respective output nodes of a power amplifier unit A11 and power amplifier unit A12 that either one operate by switching, connecting the output nodes of the first-stage matching network M12 and M13 in parallel, connecting a last-stage matching network M11 between the junction of M12 and M13 and the output terminal OUT, the first-stage matching networks M12, M13, and last-stage matching network M11 are formed, for both power amplifier units A11 and A12, so that impedance matching is established between the output terminal OUT and the power amplifier unit in operation when one unit is in operation the other is in stop of operation. The present invention allows switching from one power amplifier unit to the other without the need of a radio frequency switch.
    • 本发明提供一种射频功率放大器,其可以在高输出功率级和低输出功率级之间的开关功率放大器单元期间不会引入射频损耗。 通过将第一级匹配网络M 12和第一级匹配网络M 13连接到功率放大器单元A11和功率放大器单元A12的相应输出节点,功率放大器单元A 11和功率放大器单元A 12通过切换操作,连接第一级匹配网络 在M12和M13的连接点与输出端子OUT,第一级匹配网络M 12,M 13以及最后一级匹配网络M12之间连接最后一级匹配网络M 11, 对于功率放大器单元A 11和A 12两者形成级匹配网络M 11,使得当一个单元在操作中另一个处于停止操作时在输出端子OUT和功率放大器单元之间建立阻抗匹配 。 本发明允许从一个功率放大器单元切换到另一个,而不需要射频切换。