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This study explores the design and implementation of higher-order inverse filters (IFs) using a Current Differencing Buffered Amplifier (CDBA) as the primary active element. The proposed design enables the realization of a Fourth-Order Inverse Notch Filter (FO-INF) and a Fourth-Order Inverse All-Pass Filter (FO-IAPF) through appropriate combinations of passive components. The functionality of these filters is verified through PSPICE simulations utilizing the CMOS model of the CDBA in 180nm technology. Theoretical analysis and simulated results demonstrate strong alignment. Comprehensive evaluations, including passive sensitivity, Monte Carlo, temperature, Total Harmonic Distortion (THD) percentage, and noise analyses, are conducted to assess the performance of the filters. Experimental validation is performed using a commercially available Current Feedback Operational Amplifier (CFOA) IC AD844AN, and the layout of the proposed configuration is created using the Analog Design Environment (ADE) tool in Cadence Virtuoso. Additionally, this study introduces a theoretical framework that integrates the Discrete Wavelet Transform (DWT) with the proposed inverse filters to improve signal reconstruction efficiency.

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CDBA-Based Inverse Notch and All-Pass Filter for Enhanced Signal Reconstruction in Edge Computing

  • 会议论文

  • 发表日期：

    2026年

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  • Shekhar Suman Borah,
  • Prabha Sundaravadivel,
  • Preetha J. Roselyn

摘要

This study explores the design and implementation of higher-order inverse filters (IFs) using a Current Differencing Buffered Amplifier (CDBA) as the primary active element. The proposed design enables the realization of a Fourth-Order Inverse Notch Filter (FO-INF) and a Fourth-Order Inverse All-Pass Filter (FO-IAPF) through appropriate combinations of passive components. The functionality of these filters is verified through PSPICE simulations utilizing the CMOS model of the CDBA in 180nm technology. Theoretical analysis and simulated results demonstrate strong alignment. Comprehensive evaluations, including passive sensitivity, Monte Carlo, temperature, Total Harmonic Distortion (THD) percentage, and noise analyses, are conducted to assess the performance of the filters. Experimental validation is performed using a commercially available Current Feedback Operational Amplifier (CFOA) IC AD844AN, and the layout of the proposed configuration is created using the Analog Design Environment (ADE) tool in Cadence Virtuoso. Additionally, this study introduces a theoretical framework that integrates the Discrete Wavelet Transform (DWT) with the proposed inverse filters to improve signal reconstruction efficiency.