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New Multi-function Third-Order Inverse Filter using OTRAs

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Abstract

The inverse filters are commonly used in the fields of signal processing, communication, instrumentation, and control system for the recovery of a distorted signal. In this paper, an operational transresistance amplifier (OTRA)-based third-order multi-function inverse filter has been proposed. The proposed method uses two OTRAs and suitable combinations of admittances to realize the frequency response characteristics of inverse low-pass filter, inverse band-pass filter, inverse high-pass filter, and inverse band-reject filter. The proposed circuits have been verified by PSPICE simulations with the CMOS model of OTRA using 0.5 μm CMOS technology. The proposed third-order multi-function inverse filters give a frequency roll-off in the range of 49.79 dB/decade to 55.38 dB/decade in the transition band which gives an improvement of almost 25 to 38% in roll-off in comparison with the existing literature. The experimental verification of the proposed structure is also included.

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No funding was received to assist with the preparation of this manuscript.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, MCKV Institute of Engineering, Liluah, Howrah, 711204, India

    Subhasish Banerjee

  2. Department of Electronics and Communication Engineering, Indian Institute of Information Technology, Guwahati, 781001, India

    Mourina Ghosh

  3. Institute of Radio Physics and Electronics, University of Calcutta, Kolkata, 700009, India

    Pulak Mondal

  4. Department of Electronics and Communication Engineering, National Institute of Technology, Patna, Patna, 800005, India

    Bal Chand Nagar

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  1. Subhasish Banerjee
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  2. Mourina Ghosh
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  3. Pulak Mondal
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  4. Bal Chand Nagar
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Correspondence to Bal Chand Nagar.

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Banerjee, S., Ghosh, M., Mondal, P. et al. New Multi-function Third-Order Inverse Filter using OTRAs. J. Inst. Eng. India Ser. B 103, 913–928 (2022). https://doi.org/10.1007/s40031-021-00687-2

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  • DOI: https://doi.org/10.1007/s40031-021-00687-2

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