Design and experimentation of VDTA based oscillators using commercially available integrated circuits

Abstract

With the focus of employing single Voltage Differencing Transconductance Amplifier (VDTA) in designing of electronically tunable oscillators, three configurations have been proposed in this manuscript. Each configuration enjoys an efficient integrated circuit implementation due to use of grounded capacitors. Unambiguous and independent control of its condition and frequency of oscillation is an additional feature which is available in all the configurations along with the quadrature outputs in voltage mode. The designed configurations have been tested both through simulation and experimental setup employing a newly proposed hardware arrangement of VDTA designed using off the shelf IC, i.e., OPA860. Moreover, the oscillators have also been experimentally justified with already available hardware realization of VDTA. Experimentation results generated using two different ICs, with two different hardware setups, have been tabulated so as to provide an illustrative study of the performances of oscillators.