会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明申请
    • COMMON GATE WITH RESISTIVE FEED-THROUGH LOW NOISE AMPLIFIER
    • 具有阻性低噪声放大器的共栅
    • WO2004062093A3
    • 2004-09-16
    • PCT/US0339174
    • 2003-12-09
    • CALIFORNIA INST OF TECHNHAJIMIRI SEYED-ALIGUAN XIANG
    • HAJIMIRI SEYED-ALIGUAN XIANG
    • H03F3/193
    • H03F3/193H03F2200/294H03F2200/372
    • A radio-frequency amplifier is provided. The radiofrequency amplifier includes a transistor having an input terminal, an output terminal, a control terminal, and a transconductance gm. A series-connected feed-through resistance Rf and feed-through capacitance Cf is connected in parallel with the input terminal and the output terminal of the transistor. A load resistance RL is connected to the output terminal. The control terminal of the transistor is biased at a fixed voltage. Part of the transistor noise follows the looped path through the feed-through resistor instead of passing on to the load, which reduces the noise figure of the amplifier. The value of gm, Rf and RL are chosen in a way to keep the input impedance of the amplifier matched to a well-defined signal source impedance.
    • 提供射频放大器。 射频放大器包括具有输入端子,输出端子,控制端子和跨导gm的晶体管。 串联连接的馈通电阻Rf和馈通电容Cf与晶体管的输入端子和输出端子并联连接。 负载电阻RL连接到输出端子。 晶体管的控制端子被偏置在固定电压。 部分晶体管噪声遵循通过馈通电阻器的环路而不是传递到负载,这降低了放大器的噪声系数。 选择gm,Rf和RL的值是为了保持放大器的输入阻抗与定义良好的信号源阻抗相匹配。