Dual Mode Biquadratic Fractional Order Filter Using VDTA

This paper presents a novel configuration for a biquadratic filter employing a single voltage differencing transconductance amplifier (VDTA) and fractional order capacitors. The proposed filter leverages the flexibility and tunability of VDTAs in conjunction with fractional-order components to achie...

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Bibliographic Details
Published inInternational Conference on Signal Processing and Communication (Online) pp. 665 - 670
Main Authors Vardhan, Dhairya, Agarwal, Sachin Nath
Format Conference Proceeding
LanguageEnglish
Published IEEE 20.02.2025
Subjects
Analog Signal Processing
Capacitors
Current Mode
Cutoff frequency
Fractional Order Element
Fractional Order Filter
Frequency response
Prototypes
Semiconductor device modeling
Simulation
Software
SPICE
Transconductance
Tuning
VDTA
Voltage Mode
Online AccessGet full text
ISSN2643-444X
DOI10.1109/ICSC64553.2025.10967689

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Summary:This paper presents a novel configuration for a biquadratic filter employing a single voltage differencing transconductance amplifier (VDTA) and fractional order capacitors. The proposed filter leverages the flexibility and tunability of VDTAs in conjunction with fractional-order components to achieve enhanced performance and control over frequency characteristics. Fractional capacitance elements, modelled using Continued Fraction Expansion (CFE), are implemented to enable the realization of fractional-order impedance, allowing for smoother transitions and improved selectivity compared to conventional integer-order filters. The proposed design is validated through LT SPICE simulations utilizing TSMC CMOS technology. Key parameters such as fractional order and cutoff frequency are studied to demonstrate the adaptability of the proposed structure.
ISSN:2643-444X
DOI:10.1109/ICSC64553.2025.10967689