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    • 2. 发明公开
    • Hybrid digital/analog power amplifier
    • Hybride Digital / Analog-Leistungsverstärker
    • EP2750288A1
    • 2014-07-02
    • EP13199769.4
    • 2013-12-30
    • LSI Corporation
    • Wilson, Ross S.Abdelli, Said E.Kiss, PeterAzadet, KameranLaturell, Donald R.Macdonald, James F.
    • H03F3/189H03F3/217
    • H03F3/38H03F3/189H03F3/217
    • The invention may be embodied in radio frequency power amplifier (RF-PA) predriver circuits employing a hybrid analog/digital RF architecture including a resynchronizing digital-to-analog convertor to drive an efficient high-power output stage suitable for driving standard high power amplifier (HPA) output devices. The hybrid analog/digital RF architecture retains the advantages of high digital content integration found in conventional Class-S architecture, while relaxing the performance requirements on the output transistors and on the bitstream generator. The resulting predriver circuit combines the VLSI integration benefits of digital designs with the extensibility to arbitrary output power levels characteristic of analog designs. The hybrid analog/digital driving circuit is well suited for use with analog and Class-S HPAs used in wireless communication systems, such as the Doherty type HPA.
    • 本发明可以体现在使用包括再同步数模转换器的混合模拟/数字RF架构的射频功率放大器(RF-PA)预驱动电路中,以驱动适于驱动标准高功率放大器的高效大功率输出级 (HPA)输出设备。 混合模拟/数字RF架构保留了在传统S类架构中发现的高数字内容集成的优点,同时放松了对输出晶体管和比特流发生器的性能要求。 所得到的预驱动电路将数字设计的VLSI集成优势与模拟设计特有的任意输出功率电平的可扩展性相结合。 混合模拟/数字驱动电路非常适用于无线通信系统中使用的模拟和Class-S HPA,例如Doherty型HPA。