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    • 6. 发明授权
    • Frequency enhanced emitter coupled logic topology
    • 频率增强型发射极耦合逻辑拓扑
    • US08937495B1
    • 2015-01-20
    • US13852775
    • 2013-03-28
    • Russell D. WyseMark A. WilliMichael L. Hageman
    • Russell D. WyseMark A. WilliMichael L. Hageman
    • H03K19/086H03K19/00
    • H03K19/0013
    • Emitter-coupled logic circuits and systems that include such circuits are provided. Some emitter-coupled logic circuits include a plurality of fT-doubler circuits. Each fT-doubler circuit includes a plurality of transistors coupled to one another in an arrangement such that the plurality of transistors are configured to behave as a single enhanced transistor that has an effective unity current gain frequency that is higher than if a single transistor were used in its place. The fT-doubler circuits are configured to increase an operating frequency capability of the emitter-coupled logic circuit. Some emitter-coupled logic circuits include a plurality of cascode amplifier circuits. Each cascode amplifier circuit includes multiple transistors. An emitter of at least one first transistor of the plurality of transistors is coupled to a collector of at least one second transistor of the plurality of transistors Some emitter-coupled logic circuits may include both fT-doubler circuits and cascode amplifier circuits.
    • 提供了包括这种电路的发射极耦合逻辑电路和系统。 一些发射极耦合逻辑电路包括多个fT倍增电路。 每个fT倍增电路包括多个晶体管,这些晶体管以这样的结构彼此耦合,使得多个晶体管被配置为表现为具有比单个晶体管被使用的有效单位电流增益频率高的单个增强型晶体管 在它的位置。 fT倍增电路被配置为增加发射极耦合逻辑电路的工作频率能力。 一些发射极耦合逻辑电路包括多个共源共栅放大器电路。 每个共源共栅放大器电路包括多个晶体管。 多个晶体管中的至少一个第一晶体管的发射极耦合到多个晶体管的至少一个第二晶体管的集电极。一些发射极耦合逻辑电路可以包括fT倍增电路和共源共栅放大器电路。
    • 10. 发明授权
    • Amplifier feedback and bias configuration
    • 放大器反馈和偏置配置
    • US07446612B2
    • 2008-11-04
    • US11518109
    • 2006-09-08
    • Robert Michael FisherMichael L. Hageman
    • Robert Michael FisherMichael L. Hageman
    • H03F1/30
    • H03F1/34H03F1/0272H03F1/083H03F1/56H03F3/19H03F3/195H03F3/245H03F2200/117H03F2200/144H03F2200/153H03F2200/18H03F2200/21H03F2200/451
    • A wireless communication device output amplifier configured to reduce or eliminate out of band oscillations from voltage standing waves generated by antenna impedance mismatch reflection. The amplifier is configured with an input, output, and biasing node. The biasing node is configured to receive a biasing signal from a biasing amplifier. The biasing amplifier draws current from the biasing node while providing the biasing voltage to the output amplifier. To reduce or eliminate out of band voltage standing waves from antenna reflections, a frequency dependant network is provided as a feedback loop to selectively provide feedback to the output amplifier to reduce or eliminate unwanted out of band oscillations, such as voltage standing waves. The frequency dependant network may comprise one or more resistors, inductors, and capacitors which are of small size and may be integrated.
    • 一种无线通信设备输出放大器,被配置为减少或消除由天线阻抗失配反射产生的电压驻波的带外振荡。 放大器配置有输入,输出和偏置节点。 偏置节点被配置为从偏置放大器接收偏置信号。 偏置放大器从偏置节点吸取电流,同时向输出放大器提供偏置电压。 为了减少或消除来自天线反射的带外电压驻波,提供频率相关网络作为反馈回路,以选择性地向输出放大器提供反馈以减少或消除诸如电压驻波的不期望的带外振荡。 频率依赖网络可以包括一个或多个电阻器,电感器和电容器,其尺寸小并且可以被集成。