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Prof. George Jie YUAN, Hong Kong University of Science & Technology

Theme: Mixed-signal IC Techniques for Bio-Medical Applications
Date: Jeudi 2 juillet 2009 à 15H00, salle T312 du Laboratoire TIMA

Biography

Prof. George Jie Yuan received his Ph.D in Electrical Engineering from University of Pennsylvania, Philadelphia, in 2006. He received his B.S in Electrical Engineering from Tsinghua University in 2000. Since Aug. 2006, Prof. Yuan joined the Electronic & Computer Engineering Department in Hong Kong University of Science & Technology as an assistant professor, and established the Mixed-Signal Bio-Medical IC Laboratory. Prof. Yuan’s research interest is on high-performance mixed-signal IC design for bio-medical applications. More specific research interests of his group include ultra low-power data converters, high-performance analog front-ends, and CMOS imaging sensors for medical diagnostics. Existing projects are related to applications, such as computed tomography, ultrasound imaging, intra-body communication, and extra-cellular recording. Prof. Yuan is a member of IEEE. He is the TPC Chair of IEEE Biomedical Circuits and Systems Conference 2009. He is a technical committee member of the IEEE Symposium on Circuits and Systems. He also serves as the secretary of the biomedical circuits and systems technical committee. Prof. Yuan was the finance chair of the IEEE Symposium on Electronic Design, Test & Applications 2008.

Abstract

Mixed-signal IC technologies have enabled the revolutions in high-tech industries, such as telecommunication and computer engineering. The next stop of mixed-signal IC technology could well be the bio-medical industry. As device and circuits size shrinks greatly, as well as the occurrence of new devices in exotic processes, many diagnostic and treatment procedures in the bio-medical field could be renovated with better performance, smaller devices, and less power. In HKUST, our group is actively developing mixed-signal IC design techniques for new bio-medial applications with the collaboration of device and system experts. In this talk, the design of a highly linear wide dynamic range (WDR) CMOS imaging sensor and the digitally-assisted pipeline ADC will be elaborated as examples for inspiration. The highly linear WDR CMOS imaging sensor is targeting a wide range of bio-medical imaging applications, such as bio-luminance detection, DNA micro array etc. The new architecture with on-chip calibration is able to provide 95.3dB DR with -75.6dB THD for the prototype CMOS imaging sensor. Digital calibration is a way to compensate the non-ideal characteristics of less accurate analog circuits. This could be an important way to ultra-low-power pipeline ADC design. In the prototype ADC chip, the developed background digital calibration method can improve the SINAD by 17dB to achieve 11.4-bit ENOB at 33MS/s.