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Apparatus for automatic tuning and control of series resonant circuits

  • US 6,570,370 B2
  • Filed: 08/21/2001
  • Issued: 05/27/2003
  • Est. Priority Date: 08/21/2001
  • Status: Expired due to Term
First Claim
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1. A series resonant circuit for storing or modulating magnetic field energy, the circuit comprising:

  • a. an inductive element;

    b. a driving voltage source coupled in series with said inductive element;

    c. a series capacitive element coupled in series with said inductive element and said driving voltage source, wherein said series capacitive element includes a base capacitive element and a trim capacitive element; and

    d. a switch circuit coupled in series with said trim capacitive element such that said switch circuit and said trim capacitive element are coupled in parallel with said base capacitive element, wherein said switch circuit regulates the timing and direction of current through said trim capacitive element to tune a resonant response, or to control a natural frequency, of the resonant circuit.

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