Sunit Kumar Sen Author of Evaluating Organization Development
FEATURED AUTHOR

Sunit Kumar Sen

Professor
Department of Applied Physics, University of Calcutta

Prof. of IE in the Dept.of Applied Physics, Univ.of Calcutta. He took his B Sc (Hons in Physics)from St. Xavier’s College, Kolkata in 1972,B Tech and M Tech from the Univ. of Calcutta in 1975 and 1977 respectively and Ph D (Tech)from the same University in 1993. He was Asstt. Manager in Bokaro Steel Plant during 1978-1983. In 1984, he joined the Department of Applied Physics as a Lecturer. He is a member of IEEE and IETE. He was Head of the Dept. & also USIC, Univ.of Calcutta from 2008-10

Areas of Research / Professional Expertise

    Having an industrial experience of more than five years with Bokaro Steel Plant, India in the areas of maintenance, procurement, design of electronic instruments etc.

    Worked with Block Pulse Functions(BPF) and Walsh functions, their characteristics and their applications in the field of communications.
    Now working with new designs of PRBS generators, new designs and developments of various types of ADCs like pipeline ADCs, sigma-delta ADCs, their shortcomings and possible improvements.

Books

Featured Title
 Featured Title - Fieldbus & Networking in Process Automation - 1st Edition book cover

Articles

International Journal of Advanced Computer Research

A Multi Maximal Length Multi Time Period Pseudorandom Bit Sequence Generator....


Published: Mar 22, 2013 by International Journal of Advanced Computer Research
Authors: Aritra Sinha, Sunit Kumar Sen
Subjects: Engineering - Electrical

ABS: A novel method of generating a pseudorandom binary sequence (PRBS) test signal generator is presented. A traditional PRBS generator uses a linear feedback shift register which generates a single maximum length sequence pattern having a fixed period. In this paper, three shift registers with feedback connections are employed in which the preset inputs of the shift registers are changed only on completion of their length sequences. These preset inputs are changed by employing a counter, cont.

Measurement

An Improved Lead wire Compensation Technique for Conventional Four Wire ........


Published: Jun 01, 2011 by Measurement
Authors: S.K. Sen, T.K. Pan, P. Ghosal
Subjects: Engineering - Electrical

ABSTRUCT: A new lead wire compensation technique is presented for conventional four wire resistance temperature detectors (RTDs). Existing four wire resistance temperature detectors generally use bridge balance technique to achieve balance and unbalance bridge output is calibrated in terms of unknown temperature. Out of the four leads, two leads are connected to one arm of the bridge while the other two leads are connected to the opposite arm of the bridge, normally known as ratio arms. Cont...

Measurement

An Improved Lead wire Compensation Technique for Conventional Two Wire .........


Published: Jun 20, 2006 by Measurement
Authors: Sunit Kumar Sen
Subjects: Engineering - Electrical

ABS: A new lead wire compensation technique is presented for conventional two wire resistance temperature detectors (RTDs). Existing two wire resistance temperature detectors generally use bridge balance methods, where the two lead resistances introduce appreciable error in measurements due to environment temperature variations. The presented technique considerably reduces the effects of such lead resistances and can accommodate temperature variations that the lead wires may be subjected to...

Indian J. of Engg. and Materials Sciences

A Novel Concept in the Design of a Psychrometer


Published: Aug 12, 2005 by Indian J. of Engg. and Materials Sciences
Authors: S K Sen
Subjects: Engineering - Electrical

ABSTRUCT: A novel psychrometric method for measurement of humidity of a process is proposed. The design of a psychrometer is a complex one due to simultaneous introduction of two variables at the same time, viz., the meter current is dependent on both the relative humidity and ambient temperature. The circuit design has been so made that the said current would depend only on the relative humidity of air and independent of temperature variations at the place of measurement. Cont...

Indian Journal of Engineering & Materials Sciences

A new method of analysis of chopper fed DC series motor using Walsh/block ......


Published: Dec 01, 1999 by Indian Journal of Engineering & Materials Sciences
Authors: A Deb, G Sarkar, S K Sen and A K Datta
Subjects: Engineering - Electrical

A new method of analysis of chopper fed DC series motor is presented using Walsh/block pulse domain operation transfer function technique. Output response of average speed and average current is obtained having no restriction on the variations of width, frequency and amplitude of the input wave.

Indian Journal of Engineering & Materials Sciences

Analysis of linear SISO (single input single out) control systems with sample...


Published: Feb 01, 1999 by Indian Journal of Engineering & Materials Sciences
Authors: A Deb, G Sarkar, M Bhattacharjee and S K Sen
Subjects: Engineering - Electrical

ABS: An operational technique using block pulse functions (BPF) for the analysis of control systems with sample-and-hold(S/H) is proposed. Using this technique, the output in the BPF domain is obtained by means of simple matrix multiplication. Thus, laborious algebraic manipulations associated with the z-transform technique are avoided. Also, the method needs no inverse transformation, generally associated with Laplace or z-transformation. The BPF operational matrix for differentiation D cont..

Journal of the Franklin Institute

A new set of piecewise constant orthogonal functions for the analysis of .......


Published: Mar 01, 1998 by Journal of the Franklin Institute
Authors: A Deb, G Sarkar, Manabrata Bhattacharjee and S K Sen
Subjects: Engineering - Electrical

Abstruct: The present work searches for a suitable set of orthogonal functions for the analysis of control systems with (S/H). The search starts with the applicability of the well known block pulse function (BPF) set and uses an operational technique by defining a block pulse operational transfer function (BPOTF) to analyse a few control systems. The results obtained are found to be fairly accurate. But this method failed to distinguish between an input sampled system and (Cont..)

Journal of the Franklin Institute

All integrator approach to linear SISO control system analysis using BPF


Published: Jan 01, 1997 by Journal of the Franklin Institute
Authors: A Deb, G Sarkar, M Bhattachatjee and S K Sen
Subjects: Engineering - Electrical

Abs : The present work makes use of the block pulse domain operational matrix for differentiation D1(m) to find out an operational transfer function. Analysis of simple control systems using this Block Pulse Operational Transfer Function (BPOTF) shows that the results are not so accurate when compared with the direct expansion of the exact solution in the BPF domain. To remove this defect, one shot operational matrices for repeated integration (OSOMRI) are obtained and these (cont...)

IETE Technical Review

Microprocessor based sequence identifier for balanced multiphase systems


Published: Jan 01, 1996 by IETE Technical Review
Authors: G Sarkar, A Deb and S K Sen
Subjects: Engineering - Electrical

Abs: Microprocessor based sequence identifier for balanced multiphase systems

Proceedings IEE – Control Theory & Applications, vol. 143

Analysis of linear discrete SISO control systems via a set of delta functions


Published: Nov 01, 1995 by Proceedings IEE – Control Theory & Applications, vol. 143
Authors: A Deb, G Sarkar, M. Bhattacharjee and S K Sen
Subjects: Engineering - Electrical

Abs: The paper presents a computational technique through operational matrices using a set of mutually disjoint delta functions (DF) for the analysis of linear discrete control systems. Following a brief review of the well known block pulse functions (BPF), a new set of delta functions is viewed in the same light. This set is used to develop operational transfer functions in the delta function domain (DOTF) and employed for discrete system analysis which results in the same accuracy .. cont...

Journal of the Franklin Institute

On improvement of the integral operational matrix in block pulse function an....


Published: Jul 01, 1995 by Journal of the Franklin Institute
Authors: Anish Deb, G. Sarkar, Sunit K. Sen, Manabrata Bhattacharjee
Subjects: Engineering - Electrical

Abstract It has been shown by Chen and Chung (1987) that the use of the conventional kintegral operational matrix P in block pulse function (BPF) analysis is equivalent to evaluating the BPF coefficients of the integrated function by the well known trapezoidal rule. They have improved upon P by employing a three-point interpolation polynomial in the Lagrange form to develop a new integral operational matrix P1 (say). cont...

Journal of the IETE

Microprocessor based load shedding controller (LSC) with Kalman filter.


Published: May 01, 1995 by Journal of the IETE
Authors: A Deb, S K Sen, G Sarkar and A K Datta
Subjects: Engineering - Electrical

Abs: A microprocessor based load shedding controller (LSC) with Kalman filter is presented. The filter helps in reducing noise of the accessed data. The novelty of the LSC lies in its algorithm which considers not only the deviation in the power line frequency and its rate of change, but also the second derivative of the frequency. The proposed LSC uses a modified Kalman Filtering technique to reduce the operating time of the controller . cont....

Proceedings IEE, Part D, Control Theory and Applications

Linearly pulse-width modulated block pulse functions and their applications.....


Published: Jan 01, 1995 by Proceedings IEE, Part D, Control Theory and Applications
Authors: A Deb, G Sarkar and S K Sen
Subjects: Engineering - Electrical

Abs:A modification to conventional block pulse functions (BPF) is proposed by describing a set of linearly pulse-width modulated block pulse functions (LPWM-BPF) that has been utilised to develop a generalised convolution matrix of operational nature. This matrix is used to determine convolution of time-varying functions and is also employed to solve linear feedback system identification problem. Also, a recursive technique for solving the identification problem in the conventional BPF .. cont..

Int. J of Systems Science

A new set of PW Modulated generalized block pulse functions (PWM-GBPF).


Published: Jan 01, 1995 by Int. J of Systems Science
Authors: A Deb, G Sarkar, S K Sen and A Datta
Subjects: Engineering - Electrical

Abs: The present work proposes a significant modification to conventional block pulse functions (BPF) by describing a novel set of pulse-width modulated generalized block pulse functions (PWM-GBPF) which has been utilized to develop generalized correlation matrices of operational nature. These matrices are used to determine cross-/auto-correlation of time-varying functions. Numerical examples are treated to establish the validity of the proposal. CONT...

Indian Journal of Engineering & Materials Sciences

Microprocessor based synchronizer for power systems


Published: Jan 01, 1995 by Indian Journal of Engineering & Materials Sciences
Authors: A Deb, G Sarkar and S K Sen
Subjects: Engineering - Electrical

Abs: This paper describes a microprocessor based semi-automatic synchronizer for power systems which works suitably without the aid of conventional meters normally required for synchronizing. The developed synchronizer displays useful information regarding the status of the incoming generator to guide the operator to change machine speed and/or excitation. The related software has been developed around a 8085A CPU based microprocessor and the percentage error in the measurement of .. cont...

IETE Technical Review

Optical Computing Techniques


Published: Jan 01, 1995 by IETE Technical Review
Authors: A K Datta, S K Sen, S Bandyopadhyay and M Seth
Subjects: Engineering - Electrical

Abs: A review of the contemporary issues in Optical Computing is presented. The optical systems and techniques which are used to implement different functional sub units of a digital computer are elaborated. Several architectures that are being explored for digital computing are described. Some issues relating to organisational and functional aspects of optical computing such as cellurar automata, symbolic substituion, optical artificial intelligence and optical neural network are ... cont. ...

Int. J of Systems Science

Block pulse functions, the most fundamental of all piecewise constant basis.....


Published: May 01, 1994 by Int. J of Systems Science
Authors: A Deb, G Sarkar and S K Sen
Subjects: Engineering - Electrical

Abs: It is established that block pulse functions (BPFs) are superior to the delayed unit step function (DUSF) proposed by Hwang (1983). The superiority is mainly due to the most elemental nature of BPFs in comparison to any other PCBF function. It is also proved that the operational matrix for integration in the BPF domain is connected to the integration operational matrix in the DUSF domain by simple linear transformation involving invertible Toeplitz matrices. (cont....)

Int. J of Systems Science

Cross-/Auto-Correlation of time varying signals using block pulse functions.....


Published: Jan 01, 1994 by Int. J of Systems Science
Authors: A Deb, G Sarkar, S K Sen and A K Datta
Subjects: Engineering - Electrical

Abs: The present work proposes a method based on block pulse function ( BPF) analysis for the determination of cross-/ auto-correlation of time-varying signals. These results are used subsequently to evaluate power spectral densities ( PSD) of a few codes for communication. Two Lebesgue integrable time-varying functions are represented by means of their respective equivalent BPF spectra. The BPF spectral coefficients are used to develop positive and negative correlation matrices of (CONT....)

Optical Engineering

Realization of a two-dimensional discrete Walsh transform in a uP-controlled....


Published: Jan 01, 1994 by Optical Engineering
Authors: A K Datta, S K Sen, A Deb and S Bandyopadhyay
Subjects: Engineering - Electrical

Abs: Realization of a two-dimensional discrete Walsh transform (DWT) by matrix-vector multiplication in an optical architecture is presented. Although data are entered sequentially, the parallelism of optical architecture is exploited in the proposed system and, therefore, the computation time required to obtain the DWT is less when compared to its equivalent electronic system. The hardware realization is achieved with the help of a microprocessor.

Electric Power System Research

A method of tracking power line frequency with millihertz resolution and high


Published: Jan 05, 1992 by Electric Power System Research
Authors: S K Sen, A Deb, A Roy and A K Datta
Subjects: Engineering - Electrical

Abs: A method for the accurate measurement, tracking and displaying of power line frequency with millihertz resolution is presented which has the facility of generating trip signals in the case of violations of presettable high or low frequency limits. A phase locked loop is used in the multiplier configuration to increase the measurement accuracy. Design equations are established and transient response of the system is simulated.

International Journal of Electronics

Microprocessor based simulation and digital logic model of gate turn-off thy


Published: Jan 03, 1992 by International Journal of Electronics
Authors: A Deb, S K Sen and A K Datta
Subjects: Engineering - Electrical

Abs: A digital logic model of a gate turn-off thyristor is developed considering the turn-on and turn-off mechanisms of the device. A commonly used R-C-D snubber circuit is also included in the proposed model. Relations between different delay times, e.g. storage time, Tall time, turn-off time and tail time, become apparent from the model. The model is simulated with the help of a microprocessor to establish the validity of the proposal.

Int Journal of Electronics

A uP based new software technique for global Walsh function generatin


Published: Jan 01, 1989 by Int Journal of Electronics
Authors: S K Sen, S Chatterjee, A Deb and A k Datta
Subjects: Engineering - Electrical

Abs: Walsh function and Walsh transform are important analytical and hardware tools for signal processing and have found wide applications in digital communications as well as in digital image processing. Therefore the use of Walsh function generator is very frequent in the above fields. Implementation of such a generator through hardware logic may give rise to orthogonality error in the generated function set. This paper presents a new software technique for a global Walsh function ... (cont..)