Recent experiments on spin devices like magnetic tunnel junctions (MTJ's), domain wall magnets (DWM) and spin valves have led to the possibility of having very high density on-chip memories and logic. While the possibility of having on-chip spin transfer torque memories is close to reality, several questions still exist regarding the energy benefits of spin as the state variable for logic computation. In this talk I will first discuss the advantages of using spin (as opposed to charge) as state variable for both memory and logic and then present how a cellular array of magneto-metallic spin-neurons, operating at terminal voltages ~20mV, can do efficient neural computing. Results for hand-writing recognition show more than 100X improvement in energy compared to state of the art CMOS implementation.
Kaushik Roy received BTech degree in Electronics and Electrical Communications Engineering from IIT Kharagpur, and Ph.D. degree from the Electrical and Computer Engineering department of UIUC, IL in 1990. He was with Texas Instruments, Dallas till 1993. Then he joined the Electrical and Computer Engineering faculty at the Purdue University, West Lafayette, IN, where he is currently the Edward G. Tiedemann Jr. Distinguished Professor. He has received many awards including the NSF Career Development Award in 1995, IBM faculty partnership award, ATT/Lucent Foundation award, 2005 SRC Technical Excellence Award, Humboldt Research Award in 2010, 2010 IEEE Circuits and Systems Society Technical Achievement Award, Distinguished Alumnus Award from IIT Kharagpur, Fulbright-Nehru Distinguished Chair, 2005 IEEE Circuits and system society Outstanding Young Author Award (Chris Kim), 2006 IEEE Transactions on VLSI Systems best paper award, 2013 IEEE Transactions on VLSI Best paper award. He was a Purdue University Faculty Scholar (1998-2003). He is a fellow of IEEE. He has published more than 600 papers in refereed journals and conferences, holds 15 patents, and is the co-author of two books on Low Power CMOS VLSI Design (John Wiley & McGraw Hill).