Fall 2017: Upcoming Seminars

  • Title: CANCELLED: A multi-modality CMOS cellular interfacing array for holistic cellular characterizations and cell-based drug screening
          Speaker: Prof. Hua Wang
  •       Date: Thursday, Nov. 30th, 2pm, Engineering Terrace 252

  • SSCS Distinguished Lecture: Body Area Network – Connecting things together around the body
          Speaker: Prof. Jerald Yoo
  •       Date: Friday, Dec. 1st, 2pm, CEPSR 750

  • SSCS Distinguished Lecture: Novel Circuit Design Techniques Inspired by Physics
          Speaker: Prof. Ehsan Afshari
  •       Date: Friday, Dec. 1st, 3:30pm, CEPSR 750

    Prof. Ruonan Han
    Thursday, Nov. 2nd, 10:00am-11:00am,
    IAB 418
    Progress on THz Electronics: Chip-Scale Wave-Matter Interactions and Large-Scale Active Arrays

    The advances of silicon-based THz electronic components, over the past few years, have unearthed a series of emerging opportunities and challenges. In particular, we need to bridge a new “THz gap” between those on-chip components and practical applications. To this end, we have demonstrated a few promising capabilities which are offered by (and probably only offered by) blending a multimodal electromagnetic design approach with highly-scalable system architectures. In this talk, we first explore sensing and metrology microsystems utilizing chip-scale wave-matter interactions. As one example, photons in THz range, although very weak, can excite rotational modes of polar gas molecules, resulting in ultra-narrow absorption spectral lines (Q=105~106). Through a high-parallelism operation, a dual-THz-frequency-comb spectrometer in CMOS minimizes the tradeoff between detection range and specificity in gas sensing, and provides ppm sensitivity for molecules like HCN. We will also show how such chip-scale wave-matter interactions enables miniature, fully-electronic frequency references. In the second part of this talk, we present our approach to construct large-scale coherent radiator arrays for high power combining and beam collimation, which are essential in THz imaging with longer range and higher spatial resolution. This is showcased in a 1-THz radiation source in SiGe, consisting of 42 oscillators and 91 coherent antennas in only 1-mm2 chip area. Its total radiated power of ~0.1mW and effective isotropically radiated power (EIRP) of ~20mW have advanced the prior records of silicon mid-THz work by 10x and 200x, respectively.

    Professor Ruonan Han received his Ph.D. degree in electrical and computer engineering from Cornell University in 2014. Prior to that, he received his B.Sc. degree in microelectronics from Fudan University in 2007 and M.Sc. degree in electrical engineering from the University of Florida in 2009. In 2014, he was appointed as an assistant professor by the Department of Electrical Engineering and Computer Science at Massachusetts Institute of Technology.
    The research of Prof. Han has focused on millimeter-wave and terahertz integrated circuits and microsystems for new sensing technologies in biomedical diagnosis, homeland security, and industrial quality control. He was the recipient of the IEEE Solid-State Circuits Society (SSCS) Pre-Doctoral Achievement Award, the IEEE Microwave Theory and Tech. Society (MTT-S) Graduate Fellowship Award, two Best Student Paper Award (2nd) of IEEE RFIC symposia (2012 and 2017), and the Director’s Best Thesis Award at Cornell University. He currently holds MIT E. E. Landsman (1958) Career Development Chair Professorship and is the winner of the National Science Foundation (NSF) CAREER Award.

    Prof. Soumyajit Mandal
    Case West Reserve University
    Friday, Nov. 3rd, 2:00pm-3:00pm
    Hamilton 304
    Sensors, Circuits, and Algorithms for Structural Health Monitoring

    Structural health monitoring (SHM) enables real-time and continuous evaluation of the health of mechanical, civil, and aerospace structures in order to detect the existence, location, and severity of potential damage. In a typical active SHM system, electrical actuation signals are generated to drive an array of piezoelectric transducers embedded in the structure, which in turn convert them to mechanical vibrations (Lamb waves) that travel along the structure. These ultrasonic guided waves are received by the same or another set of transducers, which convert them back to electrical signals. The received waveforms are further processed to analyze the health of the structure.
    The hardware required for SHM systems, including waveform generation, reception, digitization, and signal processing, have typically been implemented using discrete electronics. However, the size, weight, and power consumption of this approach makes it unattractive for many applications, including monitoring of aerospace structures. Minimizing the sizes of rigid electronic components is particularly important in order to ensure that the assembled sensor sheet remains mechanically compliant and conformal over curved surfaces. We have developed heterogeneous microsystems that integrate miniaturized electronics and sensors within a flexible polymer substrate to significantly reduce system size, weight, and power, thus paving the way for scalable large-area SHM systems.
    In this talk, we will describe i) the basic physics of both active and passive ultrasonic SHM; ii) integrated CMOS analog front-ends for miniaturized SHM sensor nodes; iii) the associated environmental compensation, damage detection, and localization algorithms, and iv) ultrasonic power and data transfer approaches for making the sensor nodes wireless and semi-autonomous. Experimental results from a variety of benchtop experiments will be used to explain and validate the concepts.

    Soumyajit Mandal received his B. Tech degree in Electronics and Electrical Communications Engineering from IIT Kharagpur, India in 2002 with top honors. He received his M.S. and Ph.D. degrees in Electrical Engineering from MIT in 2004 and 2009. His doctoral thesis on “Collective Analog Bioelectronic Computation,” was awarded the MIT Microsystems Technology Laboratories (MTL) Doctoral Dissertation Award. From 2010-2014 he was a Research Scientist at the Schlumberger-Doll Research center in Cambridge. Since 2014 he has been an Assistant Professor at Case Western Reserve University (CWRU) in Cleveland, where he leads the Integrated Circuits and Sensor Physics (ICSP) lab. His research interests include integrated circuits and systems, scientific instrumentation, magnetic resonance (MR) sensors, and biomedical imaging. He has worked on bio-inspired (neuromorphic and cytomorphic) integrated circuits, biomedical circuits and systems, integrated structural health monitoring systems, MEMS/NEMS interface circuits, RF energy harvesting, low-power RF systems, low-field and zero-field magnetic resonance, and other topics. He was awarded the Mentor and T. Keith Glennan Fellowship, a Nord grant, and an ACES grant by CWRU for innovations in teaching and course development. He has published over 70 papers in international journals and conferences, and has been awarded 10 patents.

    Prof. Firooz Aflatouni
    University of Pennsylvania
    Friday, Nov. 10th, 2:00pm-3:00pm
    CEPSR 750
    Electronic & photonic; 1+1=3

    The field of silicon electronics is becoming increasingly inter-disciplinary. It is not difficult to imagine a great synergy between the fields of silicon electronics and photonic integrated circuits in the next several years where integrated electronic-photonic co-design can profoundly impact both fields resulting in advances in several areas such as communication, signal processing, imaging, and sensing. In this talk examples of electronic-photonics co-design where analog, RF, and mm-wave circuits and techniques are employed to improve the performance of photonic systems will be discussed. An optical synthesizer is presented which is capable of Hz-level tuning of a semiconductor laser emitting at 200THz over a 5THz range. Other examples such as integrated Pound-Drever-Hall laser frequency stabilization system, nanophotonic coherent imager, and integrated projection system will also be presented.

    Firooz Aflatouni received the Ph.D. degree in Electrical Engineering from the University of Southern California, Los Angeles, in 2011. He was a Post-doctoral Scholar in the Department of Electrical Engineering at the California Institute of Technology before joining the University of Pennsylvania in 2014 where he is a Skirkanich Assistant Professor in the Department of Electrical and Systems Engineering. His research interests include RF-inspired photonics and low power RF, mm-wave, and THz integrated circuits. In 1999, he co-founded Pardis Bargh Company, where he was involved in the design and implementation of inclined-orbit satellite tracking systems. From 2004 to 2006, he was a Design Engineer with MediaWorks Integrated Circuits Inc., Irvine, CA. He was the recipient of 2015 IEEE Benjamin Franklin Key Award, the 2011 USC best Ph.D. thesis award, 2010 USC Ming Hsieh scholarship, and the 2010 NASA Tech Award for his work on development of a low-power Ka-Band SiGe receiver front-end MMIC for space transponder applications.

    Dr. Rabia Tugce Yazicigil
    Friday, Nov. 17th, 2:00pm-3:00pm
    Hamilton 509
    A System-Level Approach to Secure and Spectrum-Aware Wireless Communications

    The wireless spectrum crunch is driving the urgent need for shared spectrum access technologies to replace current, highly inefficient, fixed spectrum allocation policies. Further, security has become a critical component in future low-power wireless networks focused on connecting edge devices. The goal of my research is to develop energy-efficient systems for secure and spectrum-aware wireless communications. By working at the intersection of protocols, signal processing, device characteristics, and circuit design, I develop unique system solutions that would not be possible through isolated investigation. I focus on cross-layer optimization from circuits to protocols to drastically improve energy efficiency and obtain higher performance. In this talk, I will discuss a signal-model-driven compressed-sensing RF system that offers a novel and immensely more energy-efficient approach for the quick detection of interferers in a wideband spectrum. I develop a system-level approach that enables compressed-sensing systems to work in dynamic spectrum environments with changing sparsity conditions. Lastly, I will discuss a novel ultra-fast bit-level frequency-hopping system with data-driven channel selection for secure wireless communications.

    Rabia Tugce Yazicigil is currently a Postdoctoral Research Associate at MIT. She received her PhD degree in Electrical Engineering from Columbia University in 2016. She received the B.S. degree in Electronics Engineering from Sabanci University, Istanbul, Turkey in 2009, and the M.S. degree in Electrical and Electronics Engineering from École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland in 2011. Her research interests include Analog & RF integrated circuits, energy-efficient wireless systems, novel digital signal processing algorithms, and secure wireless communications. She has been a recipient of a number of awards, including the ”Electrical Engineering Collaborative Research Award” for her PhD research on Compressive Sampling Applications in Rapid RF Spectrum Sensing (2016), the second place at the Bell Labs Future X Days Student Research Competition (2015), Analog Devices Inc. outstanding student designer award (2015) and 2014 Millman Teaching Assistant Award of Columbia University. She was selected among the top 61 female graduate students and postdoctoral scholars invited to participate and present her research work in the 2015 MIT Rising Stars in Electrical Engineering Computer Science.

    Prof. Hua Wang
    Georgia Tech
    Thursday, Nov. 30th, 2:00pm-3:00pm
    Engineering Terrace 252
    A multi-modality CMOS cellular interfacing array for holistic cellular characterizations and cell-based drug screening

    Cells are highly complex systems that often exhibit multi-physics responses under external stimulus. To achieve holistic cellular characterizations, it is essential to create interfaces that can provide (1) single-cell resolution, (2) multi-modality interfacing with cells, (3) real-time two-way communication (sensing and actuation), (4) compatibility with high throughput massively parallel operations, and (5) possibility of production at commercial quantities. The nanometer-scale complementary metal-oxide semiconductor (CMOS) process is a potential candidate to realize cell-microelectronics interfaces. Electronics-based computations and signal processing, such as machine learning methods, may drastically relax the requirement on the physical interface and lead to further pixel miniaturization.
    In this talk, we will present several fully integrated multi-modality CMOS cellular joint sensor/actuator arrays with multiple sensing modalities in every array pixel to characterize different cell physiological responses, including extracellular voltage recording, cellular impedance mapping, and optical detection with shadow imaging and bioluminescence sensing. Each pixel also contains electrical voltage/current excitation for cellular stimulation. These reported CMOS cellular joint sensor/actuator arrays comprise up-to 22k multi-modality pixels on each chip with spatial resolution down to 17um*17um/pixel, achieving single-cell resolution. Multi-modality cellular sensing at the pixel level is supported, which enables holistic cell characterization and concurrent joint-modality physiological monitoring on the same cellular sample. Comprehensive biological experiments with different living cell samples demonstrate the functionality.

    Hua Wang received his M.S. and Ph.D. degrees in electrical engineering from the California Institute of Technology, Pasadena, in 2007 and 2009, respectively. He worked at Intel Corporation and Skyworks Solutions before joining the School of Electrical and Computer Engineering at Georgia Institute of Technology as an assistant professor in 2012.
    Dr. Wang received the National Science Foundation CAREER Award in 2015, the IEEE MTT-S Outstanding Young Engineer Award in 2017, the Georgia Tech Sigma Xi Young Faculty Award in 2016, the DURIP Award in 2014, the Georgia Tech ECE Outstanding Junior Faculty Member Award in 2015, and the Lockheed Dean’s Excellence in Teaching Award in 2015. He currently holds the Demetrius T. Paris Junior Professorship of the School of ECE at Georgia Tech. His research group Georgia Tech Electronics and Micro-System (GEMS) lab has won multiple best paper awards, including the IEEE RFIC Best Student Paper Awards in 2014 (1st Place) and 2016 (2nd Place), the IEEE CICC Best Student Paper Awards in 2015, the 2016 IEEE Microwave Magazine Best Paper Award, the 2016 IEEE SENSORS Best Live Demo Award (2nd Place), as well as multiple best paper award finalists at IEEE conferences.
    Dr. Wang is an Associate Editor of the IEEE Microwave and Wireless Components Letters (MWCL). He is a Technical Program Committee (TPC) Member for IEEE International Solid-State Circuits Conference (ISSCC) and a Steering Committee member for IEEE Radio Frequency Integrated Circuits Symposium (RFIC) and IEEE Custom Integrated Circuits Conference (CICC).

    Prof. Jerald Yoo
    National University of Singapore
    Friday, Dec. 1st, 2:00pm-3:30pm
    CEPSR 750
    Body Area Network – Connecting things together around the body

    Chronic diseases account for over 1/3 of deaths around the world. To mitigate the impact of such diseases, healthcare paradigm is now shifting from reactive illness management towards proactive and preemptive health management; the goal here is to maintain a healthy life in the first place or to prevent illness from getting any worse by continuously monitoring health during normal daily life. Body Area Network (BAN) is an attractive means for continuous and pervasive health monitoring, yet its unique and harsh environment gives circuit designers many challenges. As human body absorbs the majority of RF energy around GHz band, existing RF radio may not be an ideal for communications between and on-body sensors. In order solve the issues, this talk covers two types of BAN: body coupled-based and wired/fabric-based. Body-coupled based BAN utilizes human body itself as a communication medium, where the lecture will begin with channel characteristics, followed by design considerations and transceiver implementation examples. For the wired/fabric based BAN, we will cover several flexible platforms that enable BAN, and discuss what and how circuit designers should consider such non-conventional environments. Low energy circuit techniques to overcome their limitations will also be discussed. We will then will review their various system aspects.

    erald Yoo (S’05-M’10-SM’15) received the B.S., M.S., and Ph.D. degrees in Department of Electrical Engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 2002, 2007, and 2010, respectively. Since 2017, he has been with the Department of Electrical and Computer Engineering, National University of Singapore, Singapore, where he is currently an Associate Professor. From 2010 to 2016, he was with the Department of Electrical Engineering and Computer Science, Masdar Institute, Abu Dhabi, United Arab Emirates, where he was an Associate Professor. He has developed low-energy body-area-network (BAN) transceivers and wearable body sensor network using the planar-fashionable circuit board for continuous health monitoring system. He has authored book chapters in Biomedical CMOS ICs (Springer, 2010) and in Enabling the Internet of Things—From Circuits to Networks (Springer, 2017). His current research interests include low-energy circuit technology for wearable bio signal sensors, flexible circuit board platform, BAN transceivers, ASIC for piezoelectric Micromachined Ultrasonic Transducers (pMUT) and System-on-Chip (SoC) design to system realization for wearable healthcare applications. Dr. Yoo is the recipient or a co-recipient of several awards: the IEEE International Circuits and Systems (ISCAS) 2015 Best Paper Award (BioCAS Track), ISCAS 2015 Runner-Up Best Student Paper Award, the Masdar Institute Best Research Award in 2015 and the IEEE Asian Solid-State Circuits Conference (A-SSCC) Outstanding Design Awards (2005). He was the Vice Chair of IEEE Solid-State Circuits Society (SSCS) United Arab Emirates (UAE) Chapter. Currently, he serves as a Technical Program Committee Member of the IEEE A-SSCC, IEEE Custom Integrated Circuits Conference (CICC), and the IEEE International Solid-State Circuits Conference (ISSCC) Student Research Preview (SRP). He is also an Analog Signal Processing Technical Committee Member of IEEE Circuits and Systems Society.

    Prof. Ehsan Afshari
    Cornell University
    Friday, Dec. 1st, 3:30pm-5:00pm
    CEPSR 750
    Novel Circuit Design Techniques Inspired by Physics

    There are plenty of intriguing physical phenomena around us: from wave propagation in ocean to the movement of roller-coasters. These everyday examples can be used as inspiration in analog and RF circuit design. In this talk, we will show three examples of novel circuits that can achieve a much better performance compared to the conventional circuit topologies. The examples are focused on high speed, broadband, and low noise circuits.

    Ehsan Afshari was born in 1979. He received the B.Sc. degree in Electronics Engineering from the Sharif University of Technology, Tehran, Iran and the M.S. and Ph.D. degree in electrical engineering from the California Institute of Technology, Pasadena, in 2003, and 2006, respectively. In August 2006, he joined the faculty in Electrical and Computer Engineering at Cornell University. His research interests are mm-wave and terahertz electronics and low-noise integrated circuits for applications in communication systems, sensing, and biomedical devices. Prof. Afshari serves as the chair of the IEEE Ithaca section, as the chair of Cornell Highly Integrated Physical Systems (CHIPS), as a member of International Technical Committee of the IEEE Solid-State Circuit Conference (ISSCC), as a member of the Analog Signal Processing Technical Committee of the IEEE Circuits and Systems Society, as a member of the Technical Program Committee of the IEEE Custom Integrated Circuits Conference (CICC), and as a member of Technical Program Committee of the IEEE International Conference on Ultra-Wideband (ICUWB). He was awarded National Science Foundation CAREER award in 2010, Cornell College of Engineering Michael Tien excellence in teaching award in 2010, Defense Advanced Research Projects Agency (DARPA) Young Faculty Award in 2008, and Iran's Best Engineering Student award by the President of Iran in 2001. He is also the recipient of the best paper award in the Custom Integrated Circuits Conference (CICC), September 2003, the first place at Stanford-Berkeley-Caltech Inventors Challenge, March 2005, the best undergraduate paper award in Iranian Conference on Electrical Engineering, 1999, the recipient of the Silver Medal in the Physics Olympiad in 1997, and the recipient of the Award of Excellence in Engineering Education from Association of Professors and Scholars of Iranian Heritage (APSIH), May 2004.

    Fall 2017 Seminars

  • Title: Progress on THz Electronics: Chip-Scale Wave-Matter Interactions and Large-Scale Active Arrays
          Speaker: Prof. Ruonan Han
  •       Date: Thursday, Nov. 2nd, 10am, IAB 418

  • Title: Sensors, Circuits, and Algorithms for Structural Health Monitoring
          Speaker: Prof. Soumyajit Mandal
  •       Date: Friday, Nov. 3rd, 2pm, Hamilton 304

  • Title: Electronic & photonic; 1+1=3
          Speaker: Prof. Firooz Aflatouni
  •       Date: Friday, Nov. 10th, 2pm, CEPSR 750

  • Title: A System-Level Approach to Secure and Spectrum-Aware Wireless Communications
          Speaker: Dr. Rabia Tugce Yazicigil
  •       Date: Friday, Nov. 17th, 2pm, Hamilton 509

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