Pr. Ramesh Harjani
"Low Power Transceiver LO Generation using Sub-Harmonic Injection Locking"
ABSTRACT
Power dissipation is quickly becoming one to the most critical system considerations as we continue our desire to remain untethered while wanting to make our portable devices smaller and lighter. Local oscillator signal generation and signal distribution consumes a significant percentage of transceiver power. We examine the use of subharmonic injection locking as a mechanism to improve system performance while reducing power dissipation. In this presentation I will provide a brief introduction to subharmonic injection locking including phase noise properties. This will be followed by examining the use of subharmonic injection locking for three separate transceiver systems; an ultra-low power 802.15.6 transmitter, a 4GHz instantaneous wideband receiver and a 24GHz phased array.
BIOGRAPHY
Ramesh Harjani is the E.F. Johnson Professor of Electronic Communications in the Department of Electrical & Computer Engineering at the University of Minnesota. He is a Fellow of the IEEE. He received his Ph.D. in Electrical Engineering from Carnegie Mellon University in 1989. He was at Mentor Graphics, San Jose before joining the University of Minnesota. He has been a visiting professor at Lucent Bell Labs, Allentown, PA and the Army Research Labs, Adelphi, MD. He co-founded Bermai, Inc, a startup company developing CMOS chips for wireless multi-media applications in 2001. His research interests include analog/RF circuits for wired and wireless communication systems.
Dr. Harjani received best paper awards at the 1987 DAC, 1988 ICCAD, the 1998 GOMAC and the 2007, 2010 & 2012 TECHCON. His papers have been recognized as one of the most influential in the first 25 years of DAC and the Best of ICCAD. His research group won 1st prize for the SRC Design Challenges in 2000 and 2003. SHe was an Associate Editor for IEEE Transactions on Circuits and Systems Part II, 1995-1997, Guest Editors for the International Journal of High-Speed Electronics and Systems and for Analog Integrated Circuits and Signal Processing in 2004 and a Guest Editor for the IEEE Journal of Solid-State Circuits, 2009-2011. He is a Senior Editor for the IEEE Journal on Emerging & Selected Topics in Circuits & Systems (JETCAS), 2011-2013 and the Technical Program Chair for the IEEE Custom Integrated Circuits Conference. He was the Chair of the IEEE Circuits and Systems Society technical committee on Analog Signal Processing from 1999 to 2000 and a Distinguished Lecturer of the IEEE Circuits and Systems Society for 2001-2002.
Power dissipation is quickly becoming one to the most critical system considerations as we continue our desire to remain untethered while wanting to make our portable devices smaller and lighter. Local oscillator signal generation and signal distribution consumes a significant percentage of transceiver power. We examine the use of subharmonic injection locking as a mechanism to improve system performance while reducing power dissipation. In this presentation I will provide a brief introduction to subharmonic injection locking including phase noise properties. This will be followed by examining the use of subharmonic injection locking for three separate transceiver systems; an ultra-low power 802.15.6 transmitter, a 4GHz instantaneous wideband receiver and a 24GHz phased array.
BIOGRAPHY
Ramesh Harjani is the E.F. Johnson Professor of Electronic Communications in the Department of Electrical & Computer Engineering at the University of Minnesota. He is a Fellow of the IEEE. He received his Ph.D. in Electrical Engineering from Carnegie Mellon University in 1989. He was at Mentor Graphics, San Jose before joining the University of Minnesota. He has been a visiting professor at Lucent Bell Labs, Allentown, PA and the Army Research Labs, Adelphi, MD. He co-founded Bermai, Inc, a startup company developing CMOS chips for wireless multi-media applications in 2001. His research interests include analog/RF circuits for wired and wireless communication systems.
Dr. Harjani received best paper awards at the 1987 DAC, 1988 ICCAD, the 1998 GOMAC and the 2007, 2010 & 2012 TECHCON. His papers have been recognized as one of the most influential in the first 25 years of DAC and the Best of ICCAD. His research group won 1st prize for the SRC Design Challenges in 2000 and 2003. SHe was an Associate Editor for IEEE Transactions on Circuits and Systems Part II, 1995-1997, Guest Editors for the International Journal of High-Speed Electronics and Systems and for Analog Integrated Circuits and Signal Processing in 2004 and a Guest Editor for the IEEE Journal of Solid-State Circuits, 2009-2011. He is a Senior Editor for the IEEE Journal on Emerging & Selected Topics in Circuits & Systems (JETCAS), 2011-2013 and the Technical Program Chair for the IEEE Custom Integrated Circuits Conference. He was the Chair of the IEEE Circuits and Systems Society technical committee on Analog Signal Processing from 1999 to 2000 and a Distinguished Lecturer of the IEEE Circuits and Systems Society for 2001-2002.
