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Varainductor and operation method thereof based on mutual capacitance

  • US 9,812,251 B2
  • Filed: 10/12/2016
  • Issued: 11/07/2017
  • Est. Priority Date: 12/18/2013
  • Status: Active Grant
First Claim
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1. A varainductor comprising:

  • a spiral inductor comprising a ring portion;

    a ground ring surrounding at least the ring portion of the spiral inductor;

    a floating ring disposed between the ground ring and the spiral inductor, wherein an inductance level of the varainductor is based on a mutual capacitance between the spiral inductor and the floating ring and a mutual capacitance between the floating ring and the ground ring; and

    an array of switches, the array of switches configured to selectively electrically connect the ground ring to the floating ring.

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