Abstract: “In this paper, three current differencing buffered amplifier (CDBA) - based voltage - mode (VM) biquadratic all - pass filters (APFs) are presented. These circuits contain one or two CDBAs as active elements. The circuits are analyzed theoretically, an d results of their circuit simulations are presented. It is shown that the results of experiments and circuit simulations are in good agreement with theory.”

Keywords: CDBA, biquads, second order all-pass filters, current mode circuits, continuous time filters