Chemically-sensitive sensor array calibration circuitry
First Claim
1. An apparatus comprising:
- a fluidic system including a fluid delivery system configured to be in controllable flow communication with a flow cell;
a sensor device mounted in the flow cell, the sensor device comprising an array of chemical field effect transistor (chemFET) sensors arranged in rows and columns and sensor device circuitry including;
column output circuitry including a plurality of column output circuits coupled to each chemFET sensor output of corresponding columns of sensors in the array, wherein a column output circuit in the plurality includes a column sample and hold capacitor directly connected to an input node of the column output circuit; and
at least one switch to selectively connect an output of a sensor in the array to the column output circuit; and
an array controller configured to provide power and bias voltages, as well as control and timing signals to the sensor array device and output data acquired from the sensor array device.
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Accused Products
Abstract
Methods and apparatus relating to very large scale FET arrays for analyte measurements. ChemFET (e.g., ISFET) arrays may be fabricated using conventional CMOS processing techniques based on improved FET pixel and array designs that increase measurement sensitivity and accuracy, and at the same time facilitate significantly small pixel sizes and dense arrays. Improved array control techniques provide for rapid data acquisition from large and dense arrays. Such arrays may be employed to detect a presence and/or concentration changes of various analyte types in a wide variety of chemical and/or biological processes. In one example, chemFET arrays facilitate DNA sequencing techniques based on monitoring changes in hydrogen ion concentration (pH), changes in other analyte concentration, and/or binding events associated with chemical processes relating to DNA synthesis.
582 Citations
20 Claims
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1. An apparatus comprising:
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a fluidic system including a fluid delivery system configured to be in controllable flow communication with a flow cell; a sensor device mounted in the flow cell, the sensor device comprising an array of chemical field effect transistor (chemFET) sensors arranged in rows and columns and sensor device circuitry including; column output circuitry including a plurality of column output circuits coupled to each chemFET sensor output of corresponding columns of sensors in the array, wherein a column output circuit in the plurality includes a column sample and hold capacitor directly connected to an input node of the column output circuit; and at least one switch to selectively connect an output of a sensor in the array to the column output circuit; and an array controller configured to provide power and bias voltages, as well as control and timing signals to the sensor array device and output data acquired from the sensor array device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a fluidic system including a fluid delivery system configured to be in controllable flow communication with a flow cell; a sensor device mounted in the flow cell, the sensor array device comprising; an array of chemical field effect transistor (chemFET) sensors arranged in rows and columns, wherein each chemFET sensor includes a floating gate structure coupled to a corresponding chemical sample well; sensor array device circuitry including; column output circuitry including a plurality of column output circuits coupled to each chemFET sensor output of corresponding columns of sensors in the array, wherein a column output circuit in the plurality includes a column sample and hold capacitor directly connected to an input node of the column output circuit; and at least one switch to selectively connect an output of a sensor in the array to the column output circuit; and an array controller configured to provide power and bias voltages, as well as control and timing signals to the sensor array device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification