A 1 + α Order Generalized Butterworth Filter Structure and Its Field Programmable Analog Array Implementation

Fractional-order Butterworth filters of order 1 + α (0 < 1) can be implemented by a unified structure, using the method presented in this paper. The main offered benefit is that cutoff frequencies are fully controllable very simple and, also, various types (e.g., low-pass, high-pass, band-pass, and band-stop) could realized. Thanks to employment Field Programmable Analog Array device, implementation introduced reconfigurable, sense filter functions as well their both programmable.