A 1 + α Order Generalized Butterworth Filter Structure and Its Field Programmable Analog Array Implementation
Julia Nako, Costas Psychalinos, Ahmed S. Elwakil
Abstract
Fractional-order Butterworth filters of order 1 + α (0 < α < 1) can be implemented by a unified structure, using the method presented in this paper. The main offered benefit is that the cutoff frequencies of the filters are fully controllable using a very simple method and, also, various types of filters (e.g., low-pass, high-pass, band-pass, and band-stop) could be realized. Thanks to the employment of a Field Programmable Analog Array device, the implementation of the introduced method is fully reconfigurable, in the sense that various types of filter functions as well as their order are both programmable.
Topics & Concepts
Butterworth filterAnalogue filterLow-pass filterFilter (signal processing)Network synthesis filtersPrototype filterField-programmable analog arrayComputer scienceBand-pass filterCutoff frequencyElectronic engineeringMathematicsDigital filterEngineeringElectrical engineeringAnalog deviceAnalog signalDigital signal processingComputer visionAdvanced Control Systems DesignAdvanced Adaptive Filtering TechniquesDigital Filter Design and Implementation