Advances made in the Simulation of Floating Impedances using Modern Electronic Circuit Building Blocks

Netaji Subhas Institute of Technology, New Delhi, India

Active simulation of both grounded and floating impedances (FI) of various kinds has continued to remain an interesting and exciting area of analog circuits’ research for more than four decades due to their potential applications in a number of filter and oscillator realization methods.
This presentation will take an overview of the research work done in the simulation of synthetic FIs using modern electronic circuit building blocks, starting from the late eighties when Current Conveyors (CC) started overtaking the ubiquitous IC op-amp as an alternative and attractive building block for analog signal processing, in general and for realizing FIs, in particular. Since then, a large number of new electronic circuit building blocks have been proposed by researchers from time to time which have been employed to realize synthetic grounded and floating impedances of various kinds. The building blocks engaged for such purposes include Operational transconductance amplifiers (OTA), four terminal floating nullors (FTFN), Operational transresistance amplifiers (OTRA), Differential difference amplifiers (DDA), many different variants of CCs, Current differencing buffered amplifiers (CDBA), Current follower transconductance amplifiers (CFTA), Current Conveyor transconductance amplifiers (CCTA) and numerous others. In the proposed presentation, the underlying common circuit principles in seemingly different FI realisations will be elaborated, the achievements made in this area will be highlighted and the problems still remaining unattended/unresolved in this area of research will be pointed out.

Biography: Raj Senani was born on March 14, 1950 at Budaun, UP. He obtained B.Sc. in 1966 from Lucknow Univ., B.Sc. Engineering in Electrical Engineering in 1971 from HBTI, Kanpur, M.E. (Electrical Engineering) with Honours in 1974 from MNREC (now MNNIT), Allahabad and Ph.D. in Electrical Engineering for his work on the Realization of Some Classes of Active Networks in 1988, from MNREC, Univ. of Allahabad.
Dr. Senani held the positions of Lecturer (1975-1986) and Reader (1987-1988) at the EE Department of MNREC, Allahabad. He joined the ECE Department of the Delhi Institute of Technology, Delhi in 1988 as an Assistant Professor. He became a Professor in 1990. Since then, he has served as Head, ECE Department (1990-1993, 1997-1998), Head Applied Sciences (1993-1996), Head, Manufacturing Processes and Automation Engineering (1996-1998), Dean Research (1993-1996), Dean Academic (1996-1997), Dean Administration (1997-1999), Dean Post Graduate Studies (1997-2001) and Director, Netaji Subhas Institute of Technology (NSIT) during June 1996-September 1996, February 1997-June 1997 and May 2003-January 2004. He served as the Head, Division of ECE from 2000 till July 2014, as Dean, Faculty of Technology, Univ. of Delhi, during July 2011-July 2014 and as Director of NSIT, from October 2008-till December 2014.
Professor Senani's areas of teaching and research interest are Analog VLSI Circuits, Analog Signal Processing, Current-Mode Circuits, Electronic Instrumentation and Chaotic oscillators. He has authored/co-authored over 140 international research publications- which have received, as per Google Scholar, over 3300 citations with an h-index of 32 and i-10 index of 94 so far. He has authored four book chapters and two monographs namely, `Current feedback operational amplifiers and their applications’, Springer Science+Business Media, New York, 2013 and `Current Conveyors: Variants, Applications and Hardware Implementations’, Springer International Publishing, Switzerland, 2015.
He is functioning as an Editorial reviewer for over 30 international journals including several of IEEE (USA) and IET (UK) Journals. He has served as the Honorary Editor of Circuits and Systems for IETE Journal of Research during 1992-1995, 2007-2008, is currently serving as Editor-in-Chief for IETE Journal of Education. He is serving as an Associate Editor for Circuits, Systems and Signal Processing (Birkhauser-Boston, USA) since 2003 besides being Member of Editorial boards of a number of other journals.
Professor Senani is a Member of Sigma Xi (The Scientific Research Society, USA), a Senior Member of IEEE (USA), a Life Member of ISTE (India), a Fellow of the Institution of Engineers (India) and a Life Fellow of the Institute of Electronics and Telecommunication Engineers (India). He was elected a Fellow of the National Academy of Sciences, India (NASI) in 2008 for his contributions to Analog Integrated Circuits and Signal Processing and Analog VLSI. He is the recipient of the Second Laureate of the 25th Khwarizmi International Awards, bestowed upon him by Iranian Research Organization for Science and Technology (IROST) in 2012. His biography has been included in several editions of a number of international directories such as those of Marquis' Who's Who, International Biographical Centre, American Biographical Institute and several others.