Generalized structures capable of implementing both fractional-order and power-law controllers are presented in this work. The first one is an active-RC scheme, realized using one active element, while the second one is a Field Programmable Analog Array implementation offering digital programming of the realized controller functions. The derivation of the rational integer-order approximation functions is achieved, in both cases, through the employment of a curve fitting based algorithm. The behavior of the presented structures is evaluated through simulation and experimental results.