Method and apparatus for providing dynamic multi-stage signal amplification in a medical device

  • US 7,768,387 B2
  • Filed: 04/14/2008
  • Issued: 08/03/2010
  • Est. Priority Date: 04/14/2007
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a first amplifier having at least one input terminal and an output terminal, the at least one input terminal coupled to a signal source, the output terminal configured to provide a first output signal;

    a second amplifier having at least one input terminal and an output terminal, the at least one input terminal coupled to the output terminal of the first amplifier, the output terminal of the second amplifier configured to provide a second output signal;

    a processor operatively coupled to receive the first output signal and the second output signal;

    an analog to digital (A/D) converter coupled to the output terminals of the first and second amplifiers; and

    a processor operatively coupled to the A/D converter for processing the one or more signals received at the one or more first amplifier output terminal and the second amplifier output terminal;

    wherein the first output signal is a predetermined ratio of the second output signal;

    wherein the first output signal and the second output signal are associated with a monitored analyte level of a user;

    wherein the processor is configured to compare the one or more signals received at the one or more first amplifier output terminal and the second amplifier output terminal to a predetermined threshold value; and

    furtherwherein the processor is configured to process a signal associated with one of the one or more signals received at the one or more first amplifier output terminal and the second amplifier output terminal when another signal associated with the other one of the one or more signals received at the one or more first amplifier output terminal and the second amplifier output terminal exceeds the predetermined threshold value.

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