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H-bridge with sensing circuit

  • US 7,194,303 B2
  • Filed: 02/03/2005
  • Issued: 03/20/2007
  • Est. Priority Date: 11/05/2001
  • Status: Expired due to Term
First Claim
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1. An electrical circuit for an implantable cardioverter/defibrillator comprising:

  • power storage means connected to a battery;

    switching means for controlling the delivery of defibrillation pulse therapy from the power storage means to a patient; and

    sensing means for sensing a patient'"'"'s heart signal wherein interference with the sensing means is avoided by sequencing the switching means to remove residual voltage across the patient that results from the defibrillation pulse therapy;

    wherein the switching means is arranged in an H-bridge output circuit consisting of first and second high side switches, and first and second low side switches, the H-bridge switches configured to produce biphasic defibrillation pulses, wherein the interference is removed by simultaneously closing the first and second low side switches.

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