Καλούδη, ΕλένηKaloudi, Eleni2024-03-212024-03-212024-03-19https://hdl.handle.net/10889/26913This Thesis focuses on the design and implementation of non-integer order filters derived from a first-order mother transfer function. Specifically, Fractional-order, Power-Law, and Double-order Low-pass, High-pass, and Band-pass filters, as well as their Inverse counter- parts, are investigated. To effectively realize these filters, the derived transfer functions require approximation. While conventional approximation methods suffice for simulating the behavior of simple fractional operators such as the Laplacian operator sα, they prove inadequate for more complex filters, that involve more than one non-integer order coeffi- cients. Thus, a curve fitting method based on MATLAB’s fitfrd command is employed. The resulting integer-order transfer functions can be implemented using conventional filter design topologies. This study utilizes the IFLF (Inverse-Follow-the-Leader-Feedback) multiple-feedback filter topology with OTAs (Operational Transconductance Amplifiers) as the active element, leveraging the adjustability of the transconductance through fine- tuning the DC bias currents. This structure offers flexibility by enabling implementation of multiple filter transfer functions from the same active core, through bias current adjustments. Post-layout simulation results, obtained using Cadence IC design software and the Design Kit provided by the Austria Mikro Systeme (AMS) 0.35 μm CMOS technology, validate the reliability of this approach. In summary, this proposed concept offers advantages such as resistorless implementations, satisfactory accuracy, utilization of only grounded capacitors, and a universally adaptable electronic structure.enAttribution 3.0 United StatesGeneralized filtersOperational transconductance amplifiersFractional-order filtersPower-law filtersDouble-order filtersFractional calculusCMOS integrated circuitsΚλασματικός λογισμόςΓενικευμένα φίλτραΕνισχυτής διαγωγιμότηταςΦίλτρα κλασματικής τάξηςΦίλτρα κλασματικής δύναμηςΦίλτρα διπλής τάξηςΟλοκληρωμένα κυκλώματα CMOS