Reconfigurable Fractional-Order Filter with Electronically Controllable Slope of Attenuation, Pole Frequency and Type of Approximation

摘要: This paper presents design of electronically reconfigurable fractional-order filter that is able to be configured operate as low-pass (FLPF) or high-pass (FHPF). Its slope attenuation between pass band and stop band, i.e., order the filter, adjustable in range 1 2. Also, pole frequency can controlled independently with respect other tuned parameters. Moreover, particular type approximation also electronically. feature set available both for FLPF FHPF-type response. Presented structure based on well-known follow-the-leader feedback (FLF) topology adjusted our case utilization just simple active elements operational transconductance amplifiers (OTAs) current (ACAs), providing possibility control its key parameter explains how third-order FLF used approximate FHPF concerned interest. Design supported by PSpice simulations three values (1.25, 1.5, 1.75), several two types forming shape magnitude phase theoretical presumptions are successfully confirmed laboratory measurements prepared prototype behavioral modeling.