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    • 3. 发明授权
    • Communication systems w/counter-based frequency centering for mm-wave frequency bands
    • 通信系统与基于毫米波频段的基于反向的频率对中
    • US07915935B1
    • 2011-03-29
    • US12618109
    • 2009-11-13
    • Gaurav MenonNitin JainFnu Rajanish
    • Gaurav MenonNitin JainFnu Rajanish
    • H03L7/06
    • H03L7/18H03L7/00
    • A low-cost and power-efficient communication system using digital frequency centering techniques suitable for millimeter-wave wide-bandwidth bands with mostly digital components. Significant circuitry in the frequency source can be switched-off, thus conserving power. With the use of non-coherent detection, power consumption can be further reduced as higher phase noise and lower frequency accuracy can be tolerated. In the first embodiment frequency centering is achieved with a multiple-state system which compares a frequency dependent unique state to a programmed or hardwired desired state. In an alternative embodiment this multiple-state system is implemented by means of a microcontroller through either software or hardware.
    • 使用数字频率对中技术的低成本和功率高效的通信系统,适用于大多数数字组件的毫米波宽带宽频带。 频率源中的重要电路可以关闭,从而节省电力。 通过使用非相干检测,可以进一步降低功耗,因为可以容忍较高的相位噪声和较低的频率精度。 在第一实施例中,使用将频率依赖的唯一状态与编程的或硬接线的期望状态进行比较的多状态系统来实现频率对中。 在替代实施例中,该多状态系统通过软件或硬件通过微控制器来实现。
    • 8. 发明授权
    • MMIC driver amplifier having zig-zag RF signal flow
    • 具有Z字形RF信号流的MMIC驱动放大器
    • US06867651B2
    • 2005-03-15
    • US10701010
    • 2003-11-03
    • Kenneth V. BuerDeborah S. DendyGaurav Menon
    • Kenneth V. BuerDeborah S. DendyGaurav Menon
    • H03F3/195H03F3/21H03F3/60H03F3/04H03F3/14H03F3/16
    • H03F3/195H03F3/211
    • A MMIC (microwave monolithic integrated circuit) driver amplifier having a zig-zag RF signal flow and method for the same is provided. A smaller die size and higher output gain are realized with the improved amplification stage geometry provided herein. In particular, the stages are configured in a “stacked” topology permitting a zig-zag RF signal flow through the stages. Additionally, the DC bias circuitry may be centralized and adjacent stages may share vias. In particular, transistors, such as FETs (field effect transistors) are displaced from a conventional FET geometry with alternating FETs being rotated in opposite directions. The inputs (gate pads) and outputs (drain pads) of two adjacent FETs may be “shared.” In a shared input configuration, a compensation network may be coupled to the input. The improved amplifier configuration provides a multi-sectional configuration wherein one section may be the mirrored image of another. In a two section amplifier, the amplifier appears to be “folded.”
    • 提供具有Z字形RF信号流的MMIC(微波单片集成电路)驱动放大器及其方法。 通过本文提供的改进的放大级几何实现较小的管芯尺寸和较高的输出增益。 特别地,这些级被配置成允许Z字形RF信号流过级的“堆叠”拓扑。 另外,DC偏置电路可以是集中的,并且相邻的级可以共享通孔。 特别地,诸如FET(场效应晶体管)的晶体管从传统的FET几何形状中移位,交变的FET沿相反方向旋转。 两个相邻FET的输入(栅极焊盘)和输出(漏极焊盘)可以“共享”。 在共享输入配置中,补偿网络可以耦合到输入。 改进的放大器配置提供多截面配置,其中一个部分可以是另一部分的镜像。 在两段放大器中,放大器似乎是“折叠的”。
    • 9. 发明授权
    • Systems, devices, and methods for suppressing frequency spurs in mixers
    • 用于抑制混频器频率杂散的系统,设备和方法
    • US08559905B2
    • 2013-10-15
    • US11950831
    • 2007-12-05
    • Kenneth V. BuerGaurav MenonRamanamurthy V. DarapuDean Muellenberg
    • Kenneth V. BuerGaurav MenonRamanamurthy V. DarapuDean Muellenberg
    • H04B1/10H04K3/00
    • H03D7/02
    • Systems, devices and methods are disclosed for suppressing the 2LO frequency spur, output from a mixer. In various exemplary embodiments, a DC bias circuit is electrically connected to provide DC bias to one or more non-linear elements of the mixer. The biasing voltage is used to cause the current-voltage characteristics and/or junction capacitances between non-linear elements to be more symmetric and/or to suppress 2LO leakage currents that form 2LO frequency spurs at the output of the mixer. The non-linear elements may comprise one of: BJT's, diodes, and FET's. The mixer may be one of: a subharmonic mixer; a fundamental resistive mixer; a fundamental subharmonic transconductance mixer; and a fundamental transconductance mixer comprising an anti-parallel diode pair. The system may further be configured to automatically determine an appropriate DC bias voltage level that will improve one of the LO-IF isolation and the LO-RF isolation.
    • 公开了用于抑制从混频器输出的2LO频率支线的系统,装置和方法。 在各种示例性实施例中,DC偏置电路电连接以向混频器的一个或多个非线性元件提供DC偏置。 偏置电压用于使非线性元件之间的电流 - 电压特性和/或结电容更为对称和/或抑制在混频器输出端形成2LO频率杂散的2LO漏电流。 非线性元件可以包括以下之一:BJT,二极管和FET。 混合器可以是以下之一:次谐波混合器; 基本电阻混频器; 一种基本的次谐波跨导混频器; 以及包括反并联二极管对的基本跨导混频器。 该系统还可以被配置为自动确定将改善LO-IF隔离和LO-RF隔离之一的适当DC偏置电压电平。