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Dielectric biasing circuit for transformers and inductors

  • US 9,373,439 B2
  • Filed: 09/06/2013
  • Issued: 06/21/2016
  • Est. Priority Date: 08/15/2013
  • Status: Active Grant
First Claim
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1. An alternating current (AC) transformer comprising:

  • a plurality of input nodes;

    a plurality of output nodes, wherein the transformer is configured to receive an input AC electrical signal at the plurality of input nodes and supply an output AC electrical signal at the plurality of output nodes;

    a core;

    a plurality of windings wound on the core and arranged between the plurality of input nodes and plurality of output nodes, the plurality of windings defining an AC signal path to transform the input AC electrical signal into the output AC electrical signal along the AC signal path, the plurality of input nodes being coupled to a first winding of the plurality of windings and the plurality of output nodes being coupled to a second winding of the plurality of windings;

    a first faraday screen disposed between the core and the second winding, the first faraday screen being coupled to a first bias direct current (DC) voltage; and

    a second faraday screen disposed between the first faraday screen and the core, the second faraday screen being coupled to a return path of the first bias DC voltage,wherein the first and second faraday screens form a DC electrostatic field independent of the AC signal path, the DC electrostatic field being formed based on a potential difference between the first and second faraday screens, wherein the first and second faraday screens are disposed between the first and second windings for biasing capacitive elements associated with the plurality of windings using the formed DC electrostatic field.

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