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Low power A/D converter

  • US 7,623,920 B2
  • Filed: 06/30/2005
  • Issued: 11/24/2009
  • Est. Priority Date: 11/05/2001
  • Status: Expired due to Fees
First Claim
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1. A method of cardiac signal analysis comprising:

  • capturing an electrical signal between implanted electrodes;

    receiving the electrical signal on a first chip carrying substantially all analog components of a subcutaneous implantable cardioverter defibrillator (SICD);

    sampling the electrical signal to create a first sample and storing the first sample on the first chip;

    generating an output from the first chip by comparing the first sample to a stored sample also stored on the first chip using a comparator located on the first chip;

    receiving the output from the first chip on a second chip carrying substantially all digital components of the SICD;

    generating a digital signal on the second chip indicative of the amplitude of the captured electrical signal; and

    wherein the output from the first chip is the output from the comparator.

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