Calibration strategy based on reference sensor for GMR biosensing and biodetection system
In this paper, we proposed a calibration strategy utilizing reference sensor for bio-detection based on GMR sensor. With this calibration strategy, temperature drift effect can be cancelled by about 85%, and the carrier signal can be reduced by 26dB enabling a dynamic range adjustment for quantization. A 90% reduction of front-end common mode noise and error, and a sensitivity of 50ppm or 600 200nm-diameter MNPs have been proved by measurements.