ANALOG CIRCUITS IMPLEMENTATION EMPLOYING VDTA

Abstract

This research work aims to realize different types of analog circuit implementation using one of the recently introduced active building blocks i.e., voltage differencing transconductance amplifier (VDTA). Due to its intrinsic qualities such as high input impedance, wide bandwidth, and low sensitivity to parameter fluctuations, VDTAs offer a great foundation for attaining accurate impedance realisation. This work discusses the implementation of positive impedance, negative impedance and inductance simulation using VDTA. Also VDTA can be used significantly for designing filters due to its high frequency operation. A new voltage mode Tow-Thomas biquad filter using optimum number of active and passive elements is proposed in this work. Cutoff frequency, selectivity, and other voltage mode filter parameters can be tuned by modifying the digital parameters of the VDTA, such as transconductance and capacitance values. Designers can develop custom voltage-mode filter circuits that satisfy particular application needs by utilising the capabilities of VDTAs, which enables effective signal processing and frequency shaping. Moreover, the benefits of using VDTAs in integrated circuit implementations, including low power consumption, reduced chip area, and improved noise performance, are discussed.