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    • 45. 发明授权
    • Reduced gain variation biasing for short channel devices
    • 减少短通道器件的增益变化偏置
    • US09106186B1
    • 2015-08-11
    • US14268108
    • 2014-05-02
    • Marvell International Ltd.
    • David M. SignoffWayne A. Loeb
    • G05F1/10H03F1/30
    • H03F1/30H03F3/195H03F3/24H03F3/3001H03F3/45475H03F2200/294H03F2200/411H03F2200/447H03F2200/555
    • An amplifier biasing circuit that reduces gain variation in short channel amplifiers, an amplifier biasing circuit that produces a constant Gm biasing signal for short channel amplifiers, and a multistage amplifier that advantageously incorporates embodiment of both types of amplifier biasing circuits are described. Both amplifier biasing circuit approaches use an operational amplifier to equalize internal bias circuit voltages. The constant Gm biasing circuit produces a Gm of 1/R, where R is the value of a trim variable resistor value. The biasing circuit that reduces gain variation produces a Gm of approximately 1/R, where R is the value of a trim variable resistor value, however, the biasing circuit is configurable to adjust the bias circuit Gm to mitigate the impact of a wide range of circuit specific characteristics and a wide range of changes in the operational environment in which the circuit can be used, such as changes in temperature.
    • 描述了减少短通道放大器的增益变化的放大器偏置电路,为短通道放大器产生恒定的Gm偏置信号的放大器偏置电路以及有利地结合两种类型的放大器偏置电路的实施例的多级放大器。 两个放大器偏置电路方法都使用运算放大器来均衡内部偏置电路电压。 恒定Gm偏置电路产生1 / R的Gm,其中R是微调可变电阻器值的值。 减小增益变化的偏置电路产生大约1 / R的Gm,其中R是微调可变电阻器值的值,然而,偏置电路可配置为调整偏置电路Gm以减轻宽范围的影响 电路特性以及可以使用电路的操作环境的变化范围,如温度变化。
    • 50. 发明申请
    • ASSEMBLY STRUCTURE OF POWER AMPLIFIER
    • 功率放大器的组装结构
    • US20150048888A1
    • 2015-02-19
    • US14386565
    • 2012-04-06
    • Qingnan Meng
    • Qingnan Meng
    • H03F1/30
    • H03F1/30H03F2200/447H04B1/03H04B1/036H04N1/036H05K7/20509
    • An assembly structure of a power amplifier is provided. The assembly structure comprises at least two power amplifier modules, each power amplifier module comprises a heat-conducting board, an amplifier tube matching circuit board is assembled on the heat-conducting board; at least one radio frequency power amplifier tube is assembled on the amplifier tube matching circuit board, assembly directions of all the radio frequency power amplifier tubes are parallel to each other; the heat-conducting boards of adjacent two power amplifier modules are connected vertically along a transmission direction of the radio frequency signal. Comparing with the existing plane assembly technology, the application has a character of needing small assembly areas, which is adapted in an assembly environment with a certain height and small assembly areas.
    • 提供功率放大器的组装结构。 组装结构包括至少两个功率放大器模块,每个功率放大器模块包括导热板,放大管匹配电路板组装在导热板上; 在放大管匹配电路板上组装至少一个射频功率放大器管,所有射频功率放大器管的组装方向彼此平行; 相邻两个功率放大器模块的导热板沿射频信号的传输方向垂直连接。 与现有的飞机组装技术相比,该应用具有需要小组装面积的特点,适用于具有一定高度和小组装面积的组装环境。