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Tunable guard ring for improved circuit isolation

  • US 9,312,927 B2
  • Filed: 11/11/2013
  • Issued: 04/12/2016
  • Est. Priority Date: 11/11/2013
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a closed loop guard ring formed on an integrated circuit and magnetically coupled by a selected coupling factor to a first inductor formed on the integrated circuit; and

    a tunable capacitor forming a portion of the closed loop guard ring and configured to reduce magnetic field coupling from the first inductor to a second inductor.

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