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    • 1. 发明申请
    • RF INPUT STAGE FOR LOW NOISE AMPLIFIER OR MIXER
    • 低噪声放大器或混频器的射频输入级
    • WO2006032932A1
    • 2006-03-30
    • PCT/GB2005/050149
    • 2005-09-12
    • FRONTIER SILICON LIMITEDTROOP, Nicholas Mark
    • TROOP, Nicholas Mark
    • H03F1/56
    • H03F3/4508H03F1/565H03F3/19H03F2200/294H03F2200/372H03F2203/45512H03F2203/45554H03F2203/45556H03F2203/45562
    • This invention generally relates to radio frequency circuits, more particularly to circuits such as amplifier circuits, having a high dynamic range. Embodiments of the invention are particularly suitable for use in the front end of a Broadcast Radio Receiver such as a digital audio broadcast (DAB) receiver. An rf amplifier circuit, the circuit comprising: first and second inputs; at least one output; first and second inductors each having first and second connections, said first connections of said first and second inductors being respectively coupled to said first and second inputs; first and second transistors, each having at least a control connection., an input connection and an output connection, said input connections of said first and second transistors being respectively coupled to said second connections of said first and second inductors, said control connections of said first and second transistors each having a bias, and at least one of said output connections of said first and second transistors being coupled to said at least one output; and wherein said control connections of said first transistors is capacitatively coupled to said first inductor of said second inductor and said control connection of said second transistors is capacitively coupled to said first connection of said first inductor.
    • 本发明一般涉及射频电路,更具体地说涉及具有高动态范围的诸如放大器电路的电路。 本发明的实施例特别适用于诸如数字音频广播(DAB)接收机的广播无线电接收机的前端。 一种RF放大器电路,该电路包括:第一和第二输入; 至少一个输出; 第一和第二电感器各自具有第一和第二连接,所述第一和第二电感器的所述第一连接分别耦合到所述第一和第二输入; 第一和第二晶体管,每个具有至少一个控制连接,输入连接和输出连接,所述第一和第二晶体管的所述输入连接分别耦合到所述第一和第二电感器的所述第二连接,所述控制连接 第一和第二晶体管各自具有偏置,并且所述第一和第二晶体管的所述输出连接中的至少一个耦合到所述至少一个输出; 并且其中所述第一晶体管的所述控制连接电容耦合到所述第二电感器的所述第一电感器,并且所述第二晶体管的所述控制连接电容耦合到所述第一电感器的所述第一连接。