STUDY AND IMPLEMENTATION OF DIFFERENTIAL VOLTAGE CURRENT CONTROLLED CONVEYOR TRANSCONDUCTANCE AMPLIFIER BASED FILTERS

Abstract

In this thesis differential voltage current controlled conveyor transconductance amplifier (DVCCCCTA), a current mode building block and its application as higher order voltage mode filter has been studied. The higher order filter may be realized using operational simulation (or leapfrog approach), topological simulation or wave active method. A detailed discussion of wave active method and operational simulation method has been given. The wave method is used for simulating reflected and incident wave for basic building block i.e. series inductor and configuring it for other passive element realization by making appropriate connection. DVCCCTA gives the resistorless realization of wave active filter and leap-frog filter. This structure also possesses electronic tunability of cutoff frequency. A 4th order lowpass filters has been realized using DVCCCTA based wave equivalents and its performance is evaluated through SPICE simulations using 0.25μm TSMC CMOS technology parameters.