COLUMN ADC
First Claim
1. A method of generating an output signal for a chemical detection circuit, comprising:
- generating a row selection signal by a row decoder of the chemical detection circuit, the chemical detection circuit having a pixel array that includes a column 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 the column of chemical detection pixels to a digital signal by an Analog-to-Digital converter (ADC); and
outputting the converted digital signal as the output signal for the chemical detection circuit.
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.
16 Citations
5 Claims
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1. A method of generating an output signal for a chemical detection circuit, comprising:
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generating a row selection signal by a row decoder of the chemical detection circuit, the chemical detection circuit having a pixel array that includes a column 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 the column of chemical detection pixels to a digital signal by an Analog-to-Digital converter (ADC); and outputting the converted digital signal as the output signal for the chemical detection circuit. - View Dependent Claims (2, 3, 4, 5)
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Specification