Voltage Mode All pass Biquads Using Current Differencing Buffered Amplifiers CDBA

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.