VOLTAGE DIFFERENCING CURRENT CONVEYOR AND ITS APPLICATION IN ANALOG SIGNAL PROCESSING

Abstract

Ever since the introduction of current conveyors as basic building block in analog signal processing many other active building blocks have been introduced in literature. This has become possible because of the developments in the semiconductor manufacturing technologies (both bipolar as well as CMOS). During the last two decades various modifications have been done in the architecture of the current conveyor and many derivatives of this block have appeared in the literature. Voltage differencing current conveyor (VDCC) combines the features of a current conveyor and a transconductance amplifier. Voltage differencing current conveyor can be used to perform all the regular signal processing functions (summation, differencing, scalar multiplication, immittance simulation etc.). The present works deals with these signal processing applications of the voltage differencing current conveyor. After presenting an overview of the various constitutive circuits used in modern active building blocks, the applications of VDCC in analog signal processing has been presented. A novel multifunction filter with tunability properties similar to the KHN biquad has also been proposed. All the circuits presented in the dissertation have been simulated in PSPICE.