Novel Fractional-Order Current-Mode VCOs/SRCOs with All-Grounded-Passive-Elements

Abstract

Five new structures of linear fractional-order voltage-controlled oscillators (FO-VCOs) utilizing only Multiplication-Mode Current Conveyors (MMCCs) and canonic numbers of all grounded passive elements (AGPEs) are presented in this paper. The derivation procedure has been detailed along with the relevant nonideal analysis. The work also presents three fractional-order cases of the oscillators and brings out the effects of port nonidealities and port parasitics on the performance of presented FO-VCOs. The workability of all the five new FO-VCOs has been validated on PSPICE utilizing library files of AD844 and AD835 for realizing MMCC employed in the FO-VCOs. For all the three special fractional-order cases, the simulation results have been tabulated along with relevant MATLAB plots that facilitate comparison among oscillation parameters and the fractional order. The harmonic distortion figures have been found out by Fourier analysis. Experimental workability of a VCO, employing MMCC realized with AD835 and AD844 of our investigation is included to support hardware functionality.