ECE Events Shared to College

Graduate Seminar – “High-Efficiency PA Techniques: Incorporating Novel Devices and Architectures for Improved Efficiency Wideband and High-Speed Communication”
Sep 22 @ 3:00 pm – 4:00 pm
Graduate Seminar - "High-Efficiency PA Techniques: Incorporating Novel Devices     and Architectures for      Improved Efficiency Wideband and High-Speed Communication" @ Warnock (WEB 1250)

Dr. Jeffrey S. Walling

University of Utah Electrical & Computer Engineering Department

When: Monday, September 22, 2014 at 3:05 p.m.
Where: Warnock 1250


CMOS is used nearly ubiquitously for digital computation, and as such plays an ever increasing role in our lives as we increasingly use computation to improve working efficiency. Increasing levels of integration have made it possible to embed analog and RF circuits with digital processing on a single integrated circuit. The RF power amplifier (PA) has been the exception to integration in CMOS, owing to its relatively poor performance (e.g., peak output power and energy efficiency) when compared to other semiconductor technologies (e.g., III-V compounds and SiGe). In this talk I will introduce digital PAs (DPAs), which leverage CMOS inherent strengths of fast switching speeds and superior lithographic matching to yield a linear, efficient digital power amplifier. I will also examine current research in the University of Utah Power Efficient RFIC lab addressing limitations in DPAs, and high power PAs using GaN devices. The aim of such PAs is to enable reconfigurable operation for software-defined and cognitive radios networks.

Speaker Biography

Jeff Walling received the B.S. degree from the University of South Florida, Tampa, in 2000, and the M.S. and Ph. D. degrees from the University of Washington, Seattle, in 2005 and 2008, respectively. Prior to starting his graduate education he was employed at Motorola, Plantation, FL working in cellular handset development. He interned for Intel, Hillsboro from 2006-2007, where he worked on highly-digital transmitter architectures and CMOS power amplifiers and continued this research while a Postdoctoral Research Associate with the University of Washington. He is currently an Assistant Professor in the ECE Department at University of Utah, where he directs the Power Efficient RFIC Lab.

His current research interests include power amplifier design, high-efficiency transmitter architectures and low energy wireless circuits. Dr. Walling has authored over 30 articles in peer reviewed journals and refereed conferences and holds two patents. Recently he received the Best Paper Award at Mobicom 2012. He has also received the Yang Award for outstanding graduate research from the University of Washington, Department of Electrical Engineering in 2008, an Intel Predoctoral Fellowship in 2007-2008, and the Analog Devices Outstanding Student Designer Award in 2006.