ANALOG FILTER DESIGN USING VDTA AS ACTIVE BUILDING BLOCK

Abstract

This thesis investigates the design and implementation of analog filters employing the Voltage Differencing Transconductance Amplifier (VDTA) as the core active building block. VDTAs signify a notable advancement in analog signal processing, offering superior linearity, enhanced bandwidth, and improved power efficiency compared to conventional active elements such as operational amplifiers (op-amps). The research encompasses a comprehensive study of various analog filter topologies, including low-pass, high-pass, band-pass, and band-stop filters, emphasizing the VDTA's versatility and superior performance metrics. The study is structured to include a detailed theoretical analysis and extensive simulation of VDTA-based filters. The theoretical analysis entails deriving the design equations and comprehending the operational principles of VDTAs in filter circuits. These models are subjected to rigorous validation through extensive simulations using advanced electronic design automation (EDA) tool like PSPICE. Simulation data are scrutinized to ensure the models' accuracy and to optimize the filter designs for practical deployment. Performance evaluation includes measuring key parameters such as frequency response, stability, noise characteristics, and power consumption. A significant finding of this research is the VDTA's capability to function efficiently at lower supply voltages, leading to reduced power consumption. The thesis further explores the integration of VDTA-based filters into broader analog signal processing systems, illustrating their potential to enhance overall system performance. In conclusion, this research makes a significant contribution to the domain of analog filter design by presenting VDTA as a robust and efficient alternative to conventional methodologies. The findings substantiate the practical advantages of VDTA, paving the way for future innovations in analog signal processing. This work establishes a solid foundation for further exploration and application of VDTA in various analog circuit designs, promising enhanced performance, reduced power consumption, and increased versatility in modern electronic systems.