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ABSTRACT
An error in a previously published paper in this journal is pointed out and corrected.
KEYWORDS:
S. C. Dutta Roy
Formerly with the Department of Elecrical Engineering, IIT Delhi, 04, New Campus, 110016, IIT Delhi, India
ERRORS
In the above titled paper [Citation1], some errors crept in because of a mistake in writing z11 of the parallel-T RC network. It should correctly be
(1)
(1) where we have used the symbol u for jx, for simplicity. As a result, combining with
(2)
(2) given in Equation (4) of [Citation1],we get
(3)
(3) Also, the corrected T2 of Equation (6) in [Citation1] becomes
(4)
(4)
Combining Equations (3) and (4),and simplifying, we get
(5)
(5) Reverting back to u = jx, Equation (5) becomes
(6)
(6) where, as in Equation (1) of [Citation1],
(7)
(7)
Equation (6), on simulation, gives the results shown in Figure for the magnitudes of T0 ( = M0), T1 = T02( = M1) and T2 ( = M2).
Figure 1: Simulation plots (corected form of Figure 3 in [Citation1]).
![Figure 1: Simulation plots (corected form of Figure 3 in [Citation1]).](/cms/asset/0c4c1fa4-9d60-429d-80cc-f209ec391cd6/tije_a_2284904_f0001_oc.jpg)
The author regrets the inadvertant error.
ORCID
S. C. Dutta Roy http://orcid.org/0000-0002-1723-3850
AUTHOR
S C Dutta Roy was educated at the Calcutta University, and worked with the Kalyani University in India, and the University of Minnesota in the USA, before joining IIT Delhi. During his tenure there, he visited the Leeds University in the UK and the Iowa State University, Ames, Iowa, in the USA, as visiting professors. After serving the IIT Delhi for four decades in various capacities, including a deanship, he is now completely retired. However, he continues research and still publishes papers in professional journals of repute. He has been honoured by Fellowships, including IEEE Fellowship, a Distinguished Fellowship of the IETE, two Honorary Doctorates, and all major national awards, including the highest one, viz. Shanti Swarup Bhatnagar Prize of the Govt. of India, and the Distinguished Teacher Award of the IEEE Signal Processing Society. He is the author of five full time video courses, now available freely in the YouTube, numerous research papers, four patents, and two books.
Corresponding author. Email: [email protected]
Acknowledgment
The author thanks Y. V. Joshi for his help in preparing this manuscript.
Reference
- S. C. Dutta Roy, “Broadening the Stop-Bandwidth of the Parallel-T RC Null Network,” IETE J. Educ. published online 30-06-23. DOI: 10.1080/09747338.2023.2216180