Low-noise amplifier circuit

Low-noise amplifier circuit

  • CN 104,467,690 A
  • Filed: 12/04/2014
  • Published: 03/25/2015
  • Est. Priority Date: 12/04/2014
  • Status: Active Application
First Claim
Patent Images

1. a low noise amplifier circuit, is characterized in that, comprising:

  • Input coupling network, connects front-end circuit and rear end first amplifier element, for realizing the impedance matching of front end, back-end circuit;

    First amplifier element, has the amplifier element of high input impedance, is connected, amplifies input signal with input coupling network;

    First bias unit, is connected with the first amplifier element, by the quiescent operation point control online property amplification region of the first amplifier element;

    Second amplifier element, is connected with the first amplifier element, amplifies the output signal of the first amplifier element;

    Second bias unit, is connected with the second amplifier element, by the quiescent operation point control online property amplification region of the second amplifier element;

    Described second bias unit and the second amplifier element composition second level amplifying circuit, in the amplifying circuit of the described second level, the connected mode of each circuit element is that broadband connects setting.

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