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Method and apparatus of an input resistance of a passive mixer to broaden the input matching bandwidth of a common source/gate LNA

  • US 9,503,032 B2
  • Filed: 02/05/2016
  • Issued: 11/22/2016
  • Est. Priority Date: 12/06/2011
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a first spiral inductor coupled to a source of a first transistor;

    a second spiral inductor coupled to a drain of a second transistor;

    a third inductor connecting the first transistor to the second transistor;

    a first capacitance coupled in parallel to the third inductor forming a bandpass filter; and

    a second capacitance coupled in parallel to the first spiral inductor forming a resonant circuit, wherein the resonant circuit oscillates at a center frequency.

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