Column ADC
First Claim
1. A method to reduce error in generating an output signal for a chemical detection integrated circuit chip, comprising:
- generating a row selection signal by a row decoder of the chemical detection integrated circuit chip, the chemical detection integrated circuit chip having a pixel array that includes a plurality of rows and columns of chemical detection pixels, each chemical detection pixel including;
a chemically-sensitive transistor; and
a row selection device;
applying the row selection signal to a respective row selection device of a selected chemical detection pixel;
converting an analog signal at a readout signal line of a column of chemical detection pixels to a digital signal by an Analog-to-Digital converter (ADC) on the chemical detection integrated circuit chip-to provide digitized data;
serializing the digitized data in parallel for each column of chemical detection pixels on the chemical detection integrated circuit chip; and
outputting the digitized data as the output signal from the chemical detection integrated circuit chip on a plurality of serial links in parallel.
1 Assignment
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Accused Products
Abstract
The described embodiments may provide a chemical detection circuit. The chemical detection circuit may comprise a column of chemically-sensitive pixels. Each chemically-sensitive pixel may comprise a chemically-sensitive transistor, and a row selection device. The chemical detection circuit may further comprise a column interface circuit coupled to the column of chemically-sensitive pixels and an analog-to-digital converter (ADC) coupled to the column interface circuit. Each column interface circuit and column-level ADC may be arrayed with other identical circuits and share critical resources such as biasing and voltage references, thereby saving area and power.
606 Citations
5 Claims
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1. A method to reduce error in generating an output signal for a chemical detection integrated circuit chip, comprising:
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generating a row selection signal by a row decoder of the chemical detection integrated circuit chip, the chemical detection integrated circuit chip having a pixel array that includes a plurality of rows and columns of chemical detection pixels, each chemical detection pixel including; a chemically-sensitive transistor; and a row selection device; applying the row selection signal to a respective row selection device of a selected chemical detection pixel; converting an analog signal at a readout signal line of a column of chemical detection pixels to a digital signal by an Analog-to-Digital converter (ADC) on the chemical detection integrated circuit chip-to provide digitized data; serializing the digitized data in parallel for each column of chemical detection pixels on the chemical detection integrated circuit chip; and outputting the digitized data as the output signal from the chemical detection integrated circuit chip on a plurality of serial links in parallel. - View Dependent Claims (2, 3, 4, 5)
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Specification