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EMI FILTER EMPLOYING A CAPACITOR AND AN INDUCTOR TANK CIRCUIT HAVING OPTIMUM COMPONENT VALUES

  • US 20100198312A1
  • Filed: 02/17/2010
  • Published: 08/05/2010
  • Est. Priority Date: 04/13/2001
  • Status: Active Grant
First Claim
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1. A medical diagnostic or therapeutic device, comprising:

  • a medical device including a housing and a lead having a length extending between and to a proximal end adjacent to the housing and a distal end; and

    a bandstop filter associated with the lead, for attenuating current flow through the lead wire at a selected frequency, wherein the bandstop filter comprises a capacitor in parallel with an inductor, said parallel capacitor and inductor placed in series with the lead somewhere along its length between and to the proximal end and the distal end, wherein values of capacitance and inductance are selected within the range of 0.1-20,000 picofarads and 1-4000 nanohenries, respectively, such that the bandstop filter is resonant at the selected frequency.

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