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New Single-Resistance-Controlled Oscillator Configurations Using Unity-Gain Cells

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Abstract

Unity-gain voltage followers and unity-gain current followers have attracted attention in the recent literature in the context of analog signal processing as well as signal generation because of the advantages of wider bandwidth and low power consumption of these active elements as compared to other more complex building blocks. Motivated by these advantages, followers have been used as alternatives to other more complex building blocks in the realisation of filters, oscillators and more recently, in impedance converters. Although some configurations for realizing sinusoidal oscillators using unity-gain voltage/current followers have been described in the earlier literature, only one of them is a second-order single-resistance-controlled oscillator but requires as many as eight followers. This paper derives, through a state-variable synthesis approach, a number of new follower-based single-resistance-controlled oscillators requiring a much smaller number (only two to four) of followers. The new circuits are shown to possess a number of other interesting features. The workability of the new structures has been confirmed by SPICE simulation results using CMOS-based followers.

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Correspondence to R. Senani.

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S.S. Gupta was born on July 2, 1962 at Kalinjer (Banda), UP, India. He obtained B.E. in 1982 (from Government Engineering College, Rewa, India) and M.E. (Honors) in 1988 (from Motilal Nehru National Institute of Technology, Allahabad, India)- both in Electrical Engineering. He worked as a Lecturer in Electrical Engineering Department of Motilal Nehru National Institute of Technology, Allahabad during 1984–85. He worked as Design Engineer at Bharat Heavy Electricals Limited, Jhansi during 1985–87 before joining Ministry of Industry, Govt. of India in 1988 where he worked as Assistant Development Officer till June 2000.

Since June 2000, he is working as Assistant Professor in the Division of Electronics and Communication Engineering, Netaji Subhas Institute of Technology, New Delhi. His teaching and research interest are in the areas of Network Synthesis and Filter Design, Analog Integrated Circuits and Signal Processing, Bipolar and MOS current mode circuit design and chaotic nonlinear circuits and he has published thirteen papers in various international journals of repute.

Raj Senani was born on March 14, 1950 at Budaun, UP, India. He received B.Sc. from Lucknow University, B.Sc. Engg. from Harcourt Butler Technological Institute, Kanpur, M.E. (Honors) from Motilal Nehru National Institute of Technology, Allahabad and Ph.D. in Electrical Engg. from the University of Allahabad.

Dr. Senani held the positions of Lecturer (1975–1986) and Reader (1987–1988) at the Electrical Engineering Department of M.N.R. Engineering College, Allahabad. He joined the Electronics and Communication Engineering (ECE) Department of the Delhi Institute of Technology (DIT), 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), Director, Netaji Subhas Institute of Technology (NSIT) during June 1996–September 1996, February 1997–June 1997 and May 2003–January 2004. He is currently functioning as Head, Division of ECE at NSIT (2000-till date).

Professor Senani's teaching and research interests are in the areas of Circuits, Systems and Signal Processing, Bipolar and CMOS analog integrated circuits, Current-mode Signal processing, Electronic Instrumentation, Chaotic nonlinear circuits and Log-domain/Translinear circuits. He has authored or co-authored 100 research papers in the above areas which have been published in IEEE (USA), IEE (UK) and other international journals of repute.

He served as an Honorary Editor of the Research Journal of the Institution of Electronics and Telecommunication Engineers (IETE, India) during 1990–1995, in the area of Circuits and Systems and has been a Member of the Editorial Board of the IETE Journal on Education since 1995. He has been functioning as Editorial reviewer for a number of IEEE (USA), IEE (UK) and other international journals of repute. He is currently serving as an Associate Editor for the Journal on Circuits, Systems and Signal Processing, Birkhauser Boston (USA).

He is listed in several editions of Marquis' Who's Who in the World, Marquis' Who's Who in Science and Engineering, Marquis' Who' Who in Finance and Industry (all published from N.J., USA during 1998–2004); 2000 Outstanding Scholars of the 21st Century and Outstanding people of the 20th Century (both published by International Biographical Centre, Cambridge); Indo-American Who's Who (2001), Indo-Asian Who's Who (2003), Asia's Who's Who of Men & Women of Achievement (2003), Asia/Pacific Who's Who (2004) and a number of other international biographical directories.

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Gupta, S.S., Senani, R. New Single-Resistance-Controlled Oscillator Configurations Using Unity-Gain Cells. Analog Integr Circ Sig Process 46, 111–119 (2006). https://doi.org/10.1007/s10470-005-0985-7

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