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    • 22. 发明授权
    • Systems and methods for self-mixing adaptive bias circuit for power amplifier
    • 用于功率放大器的自混合自适应偏置电路的系统和方法
    • US08106712B2
    • 2012-01-31
    • US12623136
    • 2009-11-20
    • Dong Ho LeeKyu Hwan AnChang-Ho LeeJoy Laskar
    • Dong Ho LeeKyu Hwan AnChang-Ho LeeJoy Laskar
    • H03F3/04
    • H03F1/3205H03F1/0261H03F1/223H03F3/45475H03F2200/18
    • Systems and methods for providing a self-mixing adaptive bias circuit that may include a mixer, low-pass filter or a phase shifter, and a bias feeding block. The self-mixing adaptive bias circuit may generate an adaptive bias signal depending on input signal power level. As the input power level goes up, the adaptive bias circuit increases the bias voltage or bias current such that the amplifier will save current consumption at low power operation levels and obtain better linearity at high power operation levels compared to conventional biasing techniques. Moreover, the adaptive bias output signal can be used to cancel the third-order intermodulation terms (IM3) to further enhance the linearity as a secondary effect.
    • 用于提供可以包括混频器,低通滤波器或移相器的自混合自适应偏置电路的系统和方法以及偏置馈电块。 自混合自适应偏置电路可以根据输入信号功率电平产生自适应偏置信号。 随着输入功率电平上升,自适应偏置电路增加了偏置电压或偏置电流,使得放大器可以在低功率运行电平下节省电流消耗,并且与常规偏置技术相比,在高功率运行电平下获得更好的线性度。 此外,自适应偏置输出信号可以用于消除三阶互调项(IM3),以进一步增强作为次级效应的线性。
    • 23. 发明授权
    • Integrated power amplifiers for use in wireless communication devices
    • 用于无线通信设备的集成功率放大器
    • US07961048B2
    • 2011-06-14
    • US12623164
    • 2009-11-20
    • Michael Alan OakleyDong Ho LeeKyu Hwan AnChang-Ho LeeJoy Laskar
    • Michael Alan OakleyDong Ho LeeKyu Hwan AnChang-Ho LeeJoy Laskar
    • H03F3/68
    • H03F3/45188H03F1/0288H03F3/211H03F3/604
    • An integrated power amplifier can include a carrier amplifier, where the carrier amplifier is connected to a first quarter wave transformer at the input of the carrier amplifier. In addition, the power amplifier can further include at least one peaking amplifier connected in parallel with the carrier amplifier; a first differential combining structure, where the first combining structure includes a first plurality of quarter wave transformers that are configured to combine respective first differential outputs of the carrier amplifier in phase to generate a first single-ended output signal, and a second differential combining structure, where the second combining structures includes a second plurality of quarter wave transformers that are configured to combine respective second differential outputs of the at least one peaking amplifier in phase to generate a second single-ended output signal, where the first single-ended output signal and the second single-ended output signal are combinable in-phase to provide an overall output.
    • 集成功率放大器可以包括载波放大器,其中载波放大器在载波放大器的输入处连接到第一四分之一波长的变压器。 此外,功率放大器还可以包括与载波放大器并联连接的至少一个峰值放大器; 第一差分组合结构,其中所述第一组合结构包括第一多个四分之一波长变换器,其被配置为相位地组合所述载波放大器的相应的第一差分输出以产生第一单端输出信号,以及第二差分组合结构 ,其中所述第二组合结构包括第二多个四分之一波长变换器,其被配置为组合所述至少一个峰值放大器的相应的第二差分输出以产生第二单端输出信号,其中所述第一单端输出信号 并且第二单端输出信号可同步地组合以提供总体输出。
    • 27. 发明申请
    • SYSTEMS AND METHODS FOR A SPDT SWITCH OR SPMT SWITCH WITH TRANSFORMER
    • 具有变压器的SPDT开关或SPMT开关的系统和方法
    • US20110068636A1
    • 2011-03-24
    • US12565137
    • 2009-09-23
    • Dong Ho LeeMinsik AhnKyu Hwan AnWangmyong WooChang-Ho LeeJoy Laskar
    • Dong Ho LeeMinsik AhnKyu Hwan AnWangmyong WooChang-Ho LeeJoy Laskar
    • H03K17/00
    • H03K17/693Y10T307/76
    • A SPDT or SPMT switch may include a transformer having a primary winding and a secondary winding, where a first end of the secondary winding is connected to a single pole port, where a first end of the primary winding is connected to a first throw port; a first switch having a first end and a second end, where the first end is connected to ground; and a second switch, where a second end of the secondary winding is connected to both a second end of the first switch and a first end of the second switch, where a second end of the second switch is connected to a second throw port, where the first switch controls a first communication path between the single pole port and the first throw port, and where the second switch controls a second communication path between the second throw port and the single pole port.
    • SPDT或SPMT开关可以包括具有初级绕组和次级绕组的变压器,其中次级绕组的第一端连接到单极端口,其中初级绕组的第一端连接到第一端口; 第一开关,其具有第一端和第二端,其中第一端连接到地; 以及第二开关,其中所述次级绕组的第二端连接到所述第一开关的第二端和所述第二开关的第一端,其中所述第二开关的第二端连接到第二突出端口,其中 第一开关控制单极端口和第一端口之间的第一通信路径,并且其中第二开关控制第二端口和单极端口之间的第二通信路径。
    • 29. 发明申请
    • INTEGRATED POWER AMPLIFIERS FOR USE IN WIRELESS COMMUNICATION DEVICES
    • 集成功率放大器用于无线通信设备
    • US20100148877A1
    • 2010-06-17
    • US12623164
    • 2009-11-20
    • Michael Alan OakleyDong Ho LeeKyu Hwan AnChang-Ho LeeJoy Laskar
    • Michael Alan OakleyDong Ho LeeKyu Hwan AnChang-Ho LeeJoy Laskar
    • H03F3/68H03F3/16
    • H03F3/45188H03F1/0288H03F3/211H03F3/604
    • An integrated power amplifier can include a carrier amplifier, where the carrier amplifier is connected to a first quarter wave transformer at the input of the carrier amplifier. In addition, the power amplifier can further include at least one peaking amplifier connected in parallel with the carrier amplifier; a first differential combining structure, where the first combining structure includes a first plurality of quarter wave transformers that are configured to combine respective first differential outputs of the carrier amplifier in phase to generate a first single-ended output signal, and a second differential combining structure, where the second combining structures includes a second plurality of quarter wave transformers that are configured to combine respective second differential outputs of the at least one peaking amplifier in phase to generate a second single-ended output signal, where the first single-ended output signal and the second single-ended output signal are combinable in-phase to provide an overall output.
    • 集成功率放大器可以包括载波放大器,其中载波放大器在载波放大器的输入处连接到第一四分之一波长的变压器。 此外,功率放大器还可以包括与载波放大器并联连接的至少一个峰值放大器; 第一差分组合结构,其中所述第一组合结构包括第一多个四分之一波长变换器,其被配置为相位地组合所述载波放大器的相应的第一差分输出以产生第一单端输出信号,以及第二差分组合结构 ,其中所述第二组合结构包括第二多个四分之一波长变换器,其被配置为组合所述至少一个峰值放大器的相应的第二差分输出以产生第二单端输出信号,其中所述第一单端输出信号 并且第二单端输出信号可同步地组合以提供总体输出。