Academic Profile

Academic Profile

Prof Chang, Joseph Sylvester

Professor, School of Electrical & Electronic Engineering
Director, VIRTUS, IC Design Centre of Excellence

Phone: +65 67904424
Office: S1 B1B 60
Prof Chang, Joseph Sylvester

Joseph Chang received the PhD degree from the Department of Otolaryngology, Faculty of Medicine, The University of Melbourne, Australia. He is presently with the School of Electrical and Electronics Engineering, Nanyang Technological University (NTU), Singapore, and is adjunct at the Texas A&M University (USA). He was the former Associate Dean (Research and Graduate Studies), College of Engineering, NTU.

He has received numerous research grants including from DARPA (USA), European Union, industrial grants from multinational corporations, Singapore’s A*STAR, MoE, etc. He has active research international collaborations, including with the California Institute of Technology (Caltech), Massachusetts Institute of Technology (MIT) and Weill Medical College, Cornell University.

He has founded two start-ups.

He is also active in professional societies, including having served as General Chair of several IEEE-NIH (National Institutes of Health, USA) and international conferences/workshops. He was a Guest Editor of the Proceedings of the IEEE, is the Editor of the Open Column (IEEE Circuits and Systems magazine), and associate editor of the IEEE Transactions of Circuits and Systems journal.
Research Interests
Joseph Chang is multi-disciplinary engineer with research encompassing core CAS-related fields including analog, digital and aerospace circuits/systems; biomedical/life-sciences related-fields; and the emerging printed-electronics. He received the B.Eng (ECE) from Monash University, and Ph.D. from the Department of Otolaryngology, Faculty of Medicine, University of Melbourne, and has two-years IC-related industrial-experience. He is currently with the Nanyang Technological University, Singapore (and Adjunct at Texas A&M).

He has contributed to senior university administration and to ECE undergraduate/graduate education. He was the inaugural Associate-Dean of Research-and-Graduate-Studies at the 660 faculty-strong College-of-Engineering. For undergraduate education, he emphasized on promoting and instilling undergraduates’ interest in ECE, including being the chair of the Undergraduate-Research-Experience-on-Campus and Undergraduate-Research-Opportunities-Program programs, chaired Orientation-Programs and national-level undergraduate-conferences, and has given several talks in high-schools.

In the IEEE, he contributed to both core and multi-disciplinary fields, including as Guest-Editor of the Proceedings-of-the-IEEE on ‘Computational System-Biology’, Guest-Editor of the CAS-Magazine on ‘Special-Issue on Life-Sciences’, Editor of the CAS-Magazine’s Open-Column, Chairperson of the IEEE-NIH Life-Sciences-Systems-and-Applications (LiSSA) Workshop, Chairperson of two IEEE-NIH CAS-Medical-and-Environmental (CASME) Workshops, Chairperson of the LiSSA Technical-Committee, Associate-Editor of IEEE TCAS-I (3-terms) and -II, Associate-Editor of the IEEE CAS-Magazine, Distinguished-Lecturer, etc. Of specific interest, he organized the successful merging of the BioCAS and LiSSA technical-committees, largely for CAS’s concerted/united life-sciences efforts. He was instrumental in several non-IEEE establishments’ engagement in CAS’s activities, including other IEEE societies, National-Institutes-of-Health, Telemedicine-and-Advanced-Technology-Research-Center, American-Institute-of-Medical-and-Bioengineering, etc. Impact thereto includes NIH’s request for each of their 27 institutes a copy of the aforesaid CAS-magazine’s special-issue, representation by different IEEE societies at the IEEE-NIH workshops and NIH financial support for CASME.

He has published over 200 referee-reviewed publications (primarily in IEEE) and has over 20 patents (awarded/pending). In the field of ‘Class-D amplifier’, he has the most number of publications in the IEEE; and the top-ranked paper (excluding patents) and four of the top six papers in ‘Digital Class-D Amplifier’ in Google Scholar. He has received numerous grants from local and international funding-agencies (including DARPA and the EU) and from industry, amounting to >US$10M. He has founded two startups, and has designed numerous ECE-related products for industry.

His research interests are largely emerging technologies, including bioengineering, microfluidics, audiology, psychoacoustics, and analog and digital circuit designs. He leads a group of 25 researchers - externally funded - including from DARPA (USA) and from the European Union. Some description of his work may be found in the following editorials of the Proceedings of the IEEE and the IEEE Circuits and Systems Magazine (where he served as a Guest Editor):

J. Chang, S. Wong, R. Newcomb and P. Häfliger, ‘Third Revolution in Medicine – the Convergence of Life Sciences with Physical Sciences, Mathematics and Engineering’, IEEE Circuits and Systems Magazine, Special Issue on Life Sciences, Aug 2012

S. Wong, M. Ogorzalek and J. Chang, ‘Editorial on the Special Issue on Computational Systems Biology’, The Proceedings of the IEEE, Aug 2008
Current Projects
  • Digital Asynchronous-Logic: Dynamic Voltage Control
  • High Speed Integrated Circuits Design
  • Integrated III/ V-on-CMOS: Electronic Circuits and Systems Designs
  • Integrated III/ V-on-CMOS: Electronic Circuits and Systems Designs
  • Invisible Earphones/ Headphones A New Generation of Personal Audio Devices
  • Joint Industry Postgraduate II Programme
  • MEMS Capacitive-Type High-Grade Gryroscope
  • Next-Generation Acoustical Device – Personalized Audio: Invisible Headphones
  • Project CROSSBONE
  • Project Jonjo
  • Project STAAZER
  • RF CMOS ASICs for Communications Systems and High-Speed MUXDAC
  • Radiation Hardened Power Management for Nanosatellites: Intelligent Monolithic Point-of-Load DC/DC -cum-Single Event Latchup Protection (iMPDCSELP)
  • Read Out Integrated Circuits for Multispectral Infrared Detector Array
  • Self-Correction Reliable-Robust-Resilient Self-Timed Logic
  • Sub- project 7 - Very high-speed Analogue Conditioning Circuits for a Photonic Analog-to-Digital Converter
Selected Publications
  • K.L. Chang, J.S. Chang, B.H. Gwee, K.S. Chong,. (2013). Synchronous-logic and Asynchronous-logic 8051 Microcontroller Cores for Powering the Internet of Things: A Comparative Study on Dynamic Voltage Scaling and Variation Effects. IEEE Journal on Emerging and Selected Topics in Circuits and Systems, .
  • T. Lin, K.S. Chong, J.S. Chang and B.H. Gwee. (2013). An Ultra-Low Power Asynchronous-Logic In-Situ Self-Adaptive VDD System for Wireless Sensor Networks. IEEE Journal of Solid-State Circuits, 48(2), 573-586.
  • K.S. Chong, K.L. Chang, B.H. Gwee and J.S. Chang. (2012). Synchronous-logic and Globally-Asynchronous-Locally-Synchronous (GALS) Acoustic Digital Signal Processors. IEEE Journal of Solid-State Circuits, 47(3), 769-780.
  • Wei Shu and J.S. Chang. (2008). THD of Closed-Loop Analog PWM Class D Amplifiers. IEEE Transactions on Circuits and Systems I-Regular Papers, 55(6), 1769 - 1777.
  • K.S. Chong, B.H. Gwee and J.S. Chang. (2007). Energy-Efficient Synchronous-Logic and Asynchronous-Logic FFT/IFFT Processors. IEEE Journal of Solid-State Circuits, 42(9), 2034-2045.

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