Automated Calibration Loop for a Bio-FET
OwnerAuro Das, Nick Van Helleputteinventors
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Abstract
The present disclosure relates to biosensor field effect transistors (bio-FETs) and biosensor devices. The disclosure presents a biosensor device comprising one or more bio-FETs and one or more readout circuits, wherein each readout circuit is connected to a source node of one bio-FET. Each readout circuit is configured to generate a readout signal based on a bias current of the bio-FET. Further, each readout circuit is configured to calibrate the bio-FET it is connected to. To this end, each readout circuit is configured to generate a calibration signal based on a current difference between the bias current of the bio-FET and a reference current, and to control a bias of the source node of the bio-FET according to the calibration signal.
Claims20
A biosensor device comprising
- one or more biosensor field effect transistors, bio-FETs;
- and
- one or more readout circuits, wherein each readout circuit is connected to a source node of one bio-FET of the bio-FETs and is configured to generate a readout signal based on a bias current of the bio-FET;
- generate a calibration signal based on a current difference between the bias current of the bio-FET and a reference current;
- and
- control a bias of the source node of the bio-FET according to the calibration signal.
A method comprising:
- generating a readout signal based on a bias current of a bio-FET;
- generating a calibration signal based on a current difference between the bias current of the bio-FET and a reference current;
- and
- controlling a bias of a source node of the bio-FET according to the calibration signal.
Dependencies are inferred from the claim text.