An Innovative Approach of High Performance CMOS Current Conveyor - II for Analog Signal Processing Applications

ABSTRACT The purpose of this paper is to present a CMOS current conveyor circuit suitable for implementation of low-voltage, low-power, high bandwidth circuits. This circuit can be operated for a power supply of fraction of volt so as to achieve the bandwidth of current transfer function of MHz range and a power consumption of milli-watts range. Firstly, a class A current conveyor circuit that operates from a single supply of fraction of volt with a high voltage swing capability is discussed and then the same circuit can be modified to work as a class AB with a low voltage power supply in the fraction of volt range, while maintaining the same voltage swing capability. This current conveyor realization is insensitive to the threshold voltage variation caused by the body effect, which minimizes the layout area and makes both circuits a valuable addition to the analog signal processing applications. The proposed structure operates as linear circuit element and has the required performance in terms of a bandwidth using level 3 CMOS technology which is established with the help of 0.3 um simulation using PSpice software. This proposed current conveyor circuit has lot many applications in the field of analog signal processing. The proposed circuit operates satisfactorily at 0.2µm with high performance with the desired applications. PSpice simulation with the modeled parameters confirms the desired properties & performance of the proposed circuit