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Signal amplifying circuit with reduced output signal noise by introducing coupling effect and related method thereof

  • US 8,816,771 B2
  • Filed: 09/10/2012
  • Issued: 08/26/2014
  • Est. Priority Date: 05/21/2012
  • Status: Active Grant
First Claim
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1. A signal amplifying circuit, comprising:

  • an input stage circuit, arranged for receiving an input signal;

    a first inductive element, coupled between the input stage circuit and a first reference voltage, for receiving the input signal;

    an output stage circuit, arranged for generating an output signal according to the input signal; and

    a second inductive element, coupled between the output stage and a second reference voltage;

    wherein at least a part of the winding of the first inductive element is cross-coupled to at least a part of the winding of the second inductive element.

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