Abstract
A systematic design procedure for designing fractional-order controllers, which offers resistorless realizations, with electronic adjustment of their characteristics, as well as capability of on-chip implementation is presented in this chapter. This is achieved through the utilization of appropriate integer-order transfer functions for approximating the required fractional-order integration/differentiation stages. The derived multi-feedback structures are implemented using operational transconductance amplifiers as active elements in order to perform a voltage-mode realization. Also, possible realization in current-mode has been discussed. The provided application examples about the implementation of dc motor controller and, also, about a brake/throttle controller confirm the correct operation of the derived topologies.
