Design of Higher-Order Fractional Filters With Fully Controllable Frequency Characteristics
Julia Nako, Costas Psychalinos, Ahmed S. Elwakil, Dražen Jurišić
Abstract
Higher-order fractional filters with fully controllable frequency characteristics are realized in this work, after fitting the filter’s magnitude response data using a minimum-phase state-space model. Subsequently, rational integer-order transfer functions are derived and implemented using as active elements: a) Operational Transconductance Amplifiers (OTAs) and b) a Field Programmable Analog Array (FPAA) device. The realized filters enjoy electronic adjustability of their type, order, and characteristic frequencies while being easily validated on the digitally programmable FPAA platform.
Topics & Concepts
Field-programmable analog arrayTransfer functionTransconductanceFilter (signal processing)Computer scienceElectronic engineeringFrequency responseInteger (computer science)Operational transconductance amplifierAmplifierOperational amplifierBandwidth (computing)EngineeringElectrical engineeringAnalog multiplierTelecommunicationsDigital signal processingAnalog signalComputer visionProgramming languageTransistorVoltageAdvanced Control Systems DesignDigital Filter Design and ImplementationAdvancements in PLL and VCO Technologies