Electronic-Tuning-Facilitated Input Interface-Supported Load-Insensitive Filter with Extended Frequency Range

Abstract

A new filter operating in voltage mode and realizing all-pass function is proposed. The circuit requires a single current conveyor with an extra voltage input buffer stage and a floating capacitor, enjoys electronic tuning, needs input interface for easy connection and benefits by low output impedance, hence is load-insensitive and operable at twice the frequency range in comparison to other related circuits. In-depth theoretical and simulation studies are presented in support of the newly designed circuit.