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Methods and apparatus for measuring analytes

  • US 10,718,733 B2
  • Filed: 07/01/2019
  • Issued: 07/21/2020
  • Est. Priority Date: 05/29/2009
  • Status: Active Grant
First Claim
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1. A semiconductor device, comprising:

  • a sensor array formed in columns and rows, wherein each sensor in the sensor array comprises a two-transistor circuit that includes a chemically-sensitive field effect transistor (chemFET), and a row select transistor;

    an array of microwells formed on the sensor array, wherein each microwell is capacitively coupled to at least one sensor;

    circuitry for reading each chemFET in the sensor array; and

    an analog-to-digital converter (ADC) for each column in the sensor array to convert an analog signal from each chemFET in each column to a digital form that is output from the semiconductor device.

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