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Integrated ion sensing apparatus and methods

  • US 10,288,582 B2
  • Filed: 01/12/2016
  • Issued: 05/14/2019
  • Est. Priority Date: 01/12/2016
  • Status: Active Grant
First Claim
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1. An ion-sensitive probe to measure a concentration of an ion within a solution, the ion-sensitive probe comprising:

  • a semiconductor substrate;

    a first passive electrode integrated with the semiconductor substrate and configured to contact the solution and to provide a first electrical voltage as a function of the concentration of the ion within the solution;

    a second electrode integrated with the semiconductor substrate and configured to contact a reference solution, the second electrode in electrical contact with the first passive electrode; and

    an amplifier integrated with the semiconductor substrate and having an input electrically coupled with the first passive electrode, wherein a location of the amplifier integrated within the semiconductor substrate is configured to provide a co-integrated transmission path of the first voltage to reduce susceptibility of interference of the first voltage between the first electrode and the input of the amplifier.

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