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Implantable N-phasic defibrillator output bridge circuit

  • US 4,998,531 A
  • Filed: 03/28/1990
  • Issued: 03/12/1991
  • Est. Priority Date: 03/28/1990
  • Status: Expired
First Claim
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1. An output circuit for use in an implantable defibrillation system, said circuit comprising:

  • capacitor means for storing a predetermined voltage;

    first and second switching means, both connected to said capacitor means and capable of being triggered to active conditions;

    a ground-return terminal;

    first and second electrode lead terminals connected to said first and second switching means, respectively;

    third and fourth switching means connected to said first and second lead terminals, respectively, for selectively connecting said first and second electrode lead terminals, respectively, to said ground-return terminal when triggered to active conditions; and

    triggering means for triggering said first and said third switching means to said active conditions to allow voltage stored by said capacitor means to discharge through said first and second electrode lead terminals in a first polarity, and for triggering said second and fourth switching means to said active conditions to allow voltage stored by said capacitor means to discharge through said first and second electrode lead terminals in a second polarity opposite to said first polarity.

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