Single FTFN Realization of Current Transfer Functions

Abstract

The paper reports three different synthesis procedures for realizing a class of current transfer functions of any order with negative real poles using only one four terminal floating nullor (FTFN). Relations for the minimum number of elements required in the three procedures are derived. One of the realizations requires minimum number of elements, and can have all the capacitors grounded and the total capacitance a minimum. Such a realization is very much suitable for fabrication in VLSI. Simulation results obtained on an all-pass filter are in agreement with the theoretical ones.

Indexing terms:

• Current-mode circuits
• FTFN
• All-pass filter

Additional information

Notes on contributors

T S Rathore

T S Rathore was born in Jhabua (MP) on Oct 29, 1943. He is the son of freedom fighter Shri Saubhagyamal Rathore.

He obtained B Sc (Engg) ME and PhD, all in Electrical Engineering, from Indore University in 1965, 1970 and 1976, respectively. He served GS Institute of Technology and Science, Indore from 1965–1976 before joining EE Department of NT Bombay as Assistant Professor in 1978 and currently he is a Professor since 1986.

He was a Post-Doctoral Fellow at the Concordia University, Montreal, Canada (1983–85) and a Visiting Researcher (1993) at the University of South Australia, Adelaide.

He has published and presented 180 research papers in international journals/conferences. He is also a regular reviewer for several research journals including those of IETE. He is the author of the book Digital Measurement Techniques.

He was the Regional editor of the International J of Knowledge Based Engineering Systems (Adelaide, Australia) and the Guest Editor of the special issue of the J of IE on Instrumentation Electronics in 1991. He is the member of the editorial board of the National Journal of Technical Education of ISTE and was a member on the editorial board of IETE J of Education (2003–04).

He became Fellow of IETE directly in 1985. He was a volunteer member 1997–98, a co-opted member 1998–1999, a Secretary 1999–2000, 2000–2001, a Chairman 2001, a Member 2003–2004, and a Vice-Chairman 2004–06 of IETE Mumbai Centre.

Dr Rathore has received several awards including Prof SVC Aiya Award of IETE (2004), UP Government National Award (2003) and Maharashtra State National Award of ISTE (2002), Silver Medal from IEEE Bombay Section (2001) and MN Saha Award of IETE (1977).

Dr Rathore's current areas of research interest are: Fault Diagnosis in Analog Circuits, Electronics-Aided Instrumentation, Hartley Transform, Signal Processing, ADC and DAC, Active and SC Filters.

Dr Rathore is a Senior Member of IEEE, a Fellow of IE (India), a Member of ISTE and the Chairman of the ISTE-IIT Bombay Chapter 2001–05.

U P Khot

U P Khot was born in Kolhapur (Maharashtra State) on June 15, 1970.

He obtained his BE (Ind Electronics) from Amaravati University in 1991 and M Tech (Control and Instrumentation) from IIT Bombay in 1999. Currently he is pursuing his PhD at IIT Bombay.

His research interests are current-mode circuits, fault diagnosis in analog and digital circuits.

He is member of IEEE, IETE and ISTE.