Realization of voltage-mode CCII-based allpass filter and its inverse version

Abstract

A voltage-mode (VM) filter implementing first-order allpass (AP) function and its inverse signal is presented. The proposed circuit with one input and one output employs a single CCII, two resistors and one grounded capacitor. The circuit respectively implements allpass (AP) signal and its inverse function by using inverting CCII and non-inverting CCII without requiring change in the circuit topology. The phase angle is adjustable through frequency of the applied signal and/or grounded capacitor without disturbing the realizibility condition. The Personal computer simulation program with integrated circuit emphasis (PSPICE) simulation results are included.