Title :
A GMR biosensing system with sub-50ppm sensitivity
Author :
Cheng Zhu ; Lei Zhang ; Xizeng Shi ; Yunhua Gao ; Zhijie Chang ; He Qian
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
We propose a complete system solution for a GMR biosensing and detection assay, including the design and fabrication of GMR biosensor, frontend for small signal extraction, data conversion, and the backend for signal processing. The overall system was evaluated comprehensively by experiment, and a sensitivity of sub-50ppm has been achieved. This sensitivity is equivalent to about 30 magnetic particles on a 120μm × 120μm sensor and among the best of published results in literature.
Keywords :
biomagnetism; biosensors; giant magnetoresistance; magnetic particles; magnetic sensors; signal processing; GMR biosensing system; GMR biosensor; data conversion; detection assay; giant magnetoresistance; magnetic particles; sensitivity; signal processing; size 120 mum; small signal extraction; Art; Biosensors; Immune system; Magnetic particles; Sensitivity; Biosensor; Giant magnetoresistance (GMR); Sensitivity; Signal processing; Small signal extraction;
Conference_Titel :
Electron Devices and Solid-State Circuits (EDSSC), 2014 IEEE International Conference on
DOI :
10.1109/EDSSC.2014.7061099
