REALIZATION OF CONTINUOUS TIME FILTERS USING DDCCTA

Abstract

In this thesis DDCCTA has been studied and bi-quadratic filters have been realized using DDCCTA.The higher order filter may be realized using operational simulation (or leapfrog approach), topological simulation or wave active method. Both the methods has been discussed in brief here .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. A 4th order lowpass filter has been realized using DDCCTA based wave equivalents and through operational simulation method. Its performance is evaluated through SPICE simulations using 0.25μm TSMC CMOS technology parameters. A new active building block , DDCCCTA has been proposed and port relationships are verified using SPICE simulations.