Seminar Date(s)
Seminar Location
Jacobs School of Engineering, 9500 Gilman Dr, La Jolla, San Diego, California 92093
Seminar Speaker
Jeff Walling, Virginia Tech
Abstract
Mixer-based transmitters have been dominant for approximately 100 years. However, for more than a decade RF-DACs have demonstrated the ability to combine the functionality of the DAC, upconverter and amplification stages of a transmitter into a single block. The switched-capacitor power amplifier (SCPA) is a versatile RF-DAC that operates in a voltage mode and uses transistors only as switches. This talk provides a tutorial introduction of the SCPA and presents architectural examples that enable both frequency reconfigurability and operation up to mm-Wave, supporting up to 3Gb/s transmission rates. New uses of algorithmic designs for RF passives will also be introduced.
Seminar Speaker Bio
Jeff Walling received his BS from University of South Florida and his MS and PhD from University of Washington, all in Electrical Engineering. He has held industrial positions at Motorola, Intel, Qualcomm and Skyworks. His research has primarily focused on circuits for wireless communications and sensing. From 2012 to 2019, he was an assistant, then associate professor at University of Utah. Then he was head of RF transceivers at Tyndall National Institute in Cork, Ireland. Since 2021, he is an associate professor at Virginia Tech. He has served as an associate editor for TCAS-II, TCAS-I and JSSC, and on the technical program committees of the IEEE RFIC, ISSCC and NEWCAS conferences. He is a senior member of the IEEE and has more than 80 papers in peer reviewed conferences and journals.
Seminar Contact
Professor Drew Hall