AMSV Newsletter 2015

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Sensor Conventional Proposed Conventional Proposed In TPEL 2015 Self-reconfiguration property of a mixed signal controller for improving power quality compensator during light loading Man-Chung Wong, Yan-Zheng Yang, Chi-Seng Lam, Wai-Hei Choi, Ning-Yi Dai, Ya-jie Wu, Chi-Kong Wong, Sai-Weng Sin, U-Fat Chio, Seng-Pan U, R.P. Martins From Integrated Power research line Motivation Currently, when compensator performance does not satisfy international standards, other PWMs can be selected, or the dc link voltage can be increased. However, it may be the case that neither of these methods will improve compensator performance during light loading due to the low resolution of the input signals compared with the error signal and the PWM error margin. The design of digital controllers is usually based on a full loading situation. The full analog-to-digital (A/D) conversion input signal range of a digital controller is therefore utilized, to avoid analog signal saturation. In a light load situation, the digital controller may suffer from the problem of low resolution, which significantly affects its compensation performance. There is presently no achievable control strategy to deal with power quality compensation issues during light loading. Architecture A mixed signal controller for power quality compensator is proposed for enhancing the advanced performance that cannot be achieved by analog or digital controller alone and independently. Several special features can be achieved by mixed signal controller are given as follows: ▓ Adaptive Signal Conditioning and Programmability on-the-Fly ▓ Parallelism Properties and Higher Redundancy ▓ Higher Accuracy, Higher Bandwidth, Faster Response Time and Low Power ▓ Algorithm Complexity and Simplicity of Implementation The FPAA can be operated as an adaptive signal conditioning unit that preconditions and filters, according to the optimization of system performance. The modified signals then pass to the digital unit for further processing, assisted by the ADC. The digital system, FPGA/DSP, can work with a “backer” sub-program to optimize the system operation by reconfiguring the control system automatically, or to carry out self-testing and self-repairing tasks. When it is necessary to reconfigure the analog part, the re-programming data can be transferred directly through the digital path to the FPAA. Conversely, the FPAA can also send out control signals to the FPGA to modify the algorithm for protection, critical operations, etc. Input Signals vLa, vLb, vLc iLa, iLb, iLc iCa, iCb, iCc FPAA Mixed Signal Controller vLa, vLb, vLc iLa, iLb, iLc iCa, iCb, iCc Gain Saturation Signal ADC Reconfigurable Gain G FPGA/ DSP PWM Signals Ta,Ta Tb,Tb Tc,Tc Analog Signal Paths Digital Signal Paths Implementation Verification The proposed mixed signal controller is tested in a threephase four-wire hybrid active power filter (HAPF) system in comparison with a conventional digital controller. v sa v sb L s i sn i sb i sc v La v Lb v Lc ica icb icc i La i Lb i Lc A B Loads N C i Ln A N B N C N LLa LLb LLc RLa RLb RLc Inductive Linear Load IEEE Standard (
Events and Visits Visit by Mr. Ma Chi Ngai Frederico, President of FDCT with members of S&T Assessment Committee (FDCT) Visit by Dr. Peter Lam, University Council Chair Distinguished Lectures on Microelectronics Distinguished Lecture on Microelectronics - "Power Minimization in Amplifiers and Filters" by Prof. Willy Sansen , IEEE Life Fellow, Professor at the Catholic University of Leuven, in Belgium Distinguished Workshop on Analog IC Design by Professor Behzad Razavi, Professor of electrical engineering at University of California, Los Angeles, USA 4 New Academics, 1 Post-Doc and 1 Administrative Joined SKL AMS-VLSI Assistant Professor Yanwei Jia, received the B.S. and M. S degrees from Hunan University, Changsha, China in 1996 and 2002, respectively, and the Ph.D. degree from the National University of Singapore in 2006. She currently serves as assistant professor at SKL AMS-VLSI. Research interests: Microfluidics, Biotechnology and Multidisciplinary research. Assistant Professor Yong Chen, received the B.Eng. degree in electronic and information engineering, Communication University of China (CUC), Beijing, China, in 2005, and the Ph.D. in Engineering in microelectronics and solid-state electronics, Institute of Microelectronics of Chinese Academy of Sciences (IMECAS), Beijing, China, in 2010. He currently serves as assistant professor at SKL AMS-VLSI. Research Interests: Analog/Biomedical detection and RF integrated circuit, mm-wave system and circuit, high-speed on-chip and chip-to -chip Electrical/Optical Research Assistant Professor Chi-Hang Chan received the B.S. degree in electrical engineering from University of Washington (U.W. Seattle), USA, in 2008, and the M.S. degree in electrical and electronics engineering and Ph.D. degree from the University of Macau, Macao, China, in 2012 and 2015, respectively. He currently serves as research assistant professor at SKL AMS-VLSI. Research interests: Nyquist ADC, Mixed-signal circuits. Lecturer (Macao Fellow) Ka-Fai Un received the B.Sc. degree in electrical engineering from National Taiwan University (NTU), Taipei, Taiwan, in 2007, and the M.Sc. degree in electrical and electronics engineering and Ph.D. degree from the University of Macau (UM), Macao, China, in 2009 and 2014, respectively. He is currently a lecturer (Macao Fellow) at SKL AMS-VLSI. Research Interests: Wireless integrated circuits design, Mathematics. Post-Doctoral Fellow & Cleanroom Specialist Jie Gao, she received her M.Sc. degree in Materials Science and Engineering from the Technical University of Hamburg-Harburg, Germany and University of Aveiro, Portugal in 2007. She received her Ph.D. degree in Electrical and Computer Engineering from University of Macau, in 2015. She currently serves as Post-Doctoral Fellow and Cleanroom Specialist at SKL AMS-VLSI. Research interests: Design and fabrication of automated microfluidic chips for point-of-care applications. Senior Administrative Officer Weng-Keong CHE received the B.S. degree, M.S. degree and Ph.D. degree from the National Taiwan University, in 1997, 1999 and 2005, respectively. He currently serves as Senior Administrative Officer for commercialization coordination, industrial collaboration and spin-off incubation at SKL AMS-VLSI. Research interests: RF Transceiver IC / RF SoC / Fiber optical Front-End IC / MCU SoC / Automobile SoC design.
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Page 7 and 8: In ESSCIRC 2014 & JSSC 2016 An 11b
Page 9: A Digital Low-Dropout Regulator wit

AMSV Newsletter 2015

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