Research Thrust I: Mixed-Signal and Digital RF/mm-Wave Integrated Circuits and Systems
- This is a digital polar Doherty PA fully integrated in a 65nm bulk CMOS process. This design achieves superior back-off efficiency enhancement, and its unique in-field reconfigurablity offers robustness against antenna impedance variations.
- S. Hu, S. Kousai, J. Park, O. Chlieh, and H. Wang, “A +27.3dBm Transformer-Based Digital Doherty Polar Power Amplifier Fully Integrated in Bulk CMOS,” IEEE Radio Frequency Integrated Circuits (RFIC) Dig. Tech. Papers, Jun. 2014. --- This paper won the 2014 RFIC Best Student Paper Award (1st Place).
- S. Hu, S. Kousai, J. Park, O. Chlieh, and H. Wang, “Design of A Transformer-Based Reconfigurable Digital Polar
Doherty Power Amplifier Fully Integrated in Bulk CMOS,” IEEE J. of Solid-State Circuits (JSSC), vol. 50, no. 5, pp. 1094 – 1106, May 2015. --- Top 13 Most Frequently Downloaded Documents for IEEE Journal of Solid State Circuits (JSSC) in May 2015.
- This is a hybrid mixed-signal Class-G Doherty PA design fully integrated in a 65nm bulk CMOS process. It leverages the joint operation of Class-G and Doherty PA techniques and achieves the best PA efficiency enhancement in deep power back-off among reported CMOS PAs without using any switches at PA RF output. This unique mixed-signal PA architecture also enables highly linear and broadband Doherty operations.
- S. Hu, S. Kousai, and H. Wang, "A Broadband CMOS Digital Power Amplifier with Hybrid Class-G Doherty Efficiency Enhancement,” IEEE International Solid-State Circuits Conference (ISSCC) Dig. Tech. Papers, Feb. 2015.
- S. Hu, S. Kousai, and H. Wang, “A Broadband Mixed-Signal CMOS Power Amplifier with A Hybrid Class-G Doherty Efficiency Enhancement Technique,” accepted and to appear in IEEE J. of Solid-State Circuits (JSSC), 2016.
Research Thrust II: Biosensor, Bioelectronics, and Biology-Microelectronics Hybrid Systems
- This is the world first fully integrated multi-modality CMOS cellular sensor array with four different sensing modalities for holistic real-time joint-modality cellular characterization. The sensing modalities include extracellular voltage recording, cellular impedance mapping, optical detection (shadow imaging/bioluminescence sensing), and thermal monitoring.
- Our GEMS group proposes and pioneers the concept of multi-modality sensing for holistic cellular characertization. The potential applications include massively parallel drug development, chemical screening, personalized medicine, high throughput stem cell characterization, cancer cell monitoring.
- J. Park, T. Chi, J. Butts, T. Hookway, T. C. McDevitt, and H. Wang, "A Multi-Modality CMOS Sensor Array for Cell-Based Assay and Drug Screening,” IEEE International Solid-State Circuits Conference (ISSCC) Dig. Tech. Papers, Feb. 2015.
- T. Chi, J. S. Park, J. C. Butts, T. A. Hookway, A. Su, C. Zhu, M. P. Styczynski, T. C. McDevitt, and H. Wang, “A Multi-Modality CMOS Sensor Array for Cell-Based Assay and Drug Screening,” accepted and to appear in IEEE Trans. Biomed. Circuits Syst. (TBCAS), Dec. 2015.
- Press coverage at major news media: EETimes, SRC, Bloomberg, Business Wire, Phys.org, Solid State Technology, Virtual-Strategy Magazine, Digital Journal, EIN News Desk, EETimes (Japan)
Research Thrust III: THz Integrated Circuits and Systems for Imaging and Spectroscopy Applications
- This is a 500GHz signal source fully integrated in a 90nm SiGe process. It utilizes a unique multi-phase sub-harmonic injection locking technique to substantially extend the system frequency tuning range. It demonstrates a total 5.1% frequency range from 485.1 GHz to 510.7 GHz and an output phase noise of -87 dBc/Hz at 1 MHz offset, achieving the largest frequency tuning range and the best phase noise among the reported Si-based THz oscillator sources at 0.5 THz.
- T. Chi, J. Luo, S. Hu and H. Wang, "A Multi-Phase Sub-Harmonic Injection Locking Technique for Bandwidth Extension in Silicon-Based THz Signal Generation,” IEEE Custom Integrated Circuits Conference (CICC) Dig. Tech. Papers, Sep. 2014. --- 2014 CICC Best Student Paper Award Finalist.
- T. Chi, J. Luo, S. Hu, and H. Wang, “A Multi-Phase Sub-Harmonic Injection Locking Technique for Bandwidth Extension in Silicon-Based THz Signal Generation,” IEEE J. of Solid-State Circuits (JSSC), vol. 50, no. 5, pp. 1861 - 1873, Aug. 2015.
Last revised on Dec 30, 2015.