Design of Low Voltage Current Conveyor based on Bulk-driven Self-cascode approach

Abstract

This paper proposes two possible approaches towards low voltage, low power and high performance second generation current conveyor (CCII) based on bulk-driven self- cascode (BD SC) structure. Bulk-driven transistors and self- cascode technique are extensively used separately for the design of low voltage current conveyor (CCII). The combination of these two techniques has been used as a novel approach to improve the performance of low voltage current conveyors in terms of bandwidth, terminal parasitic impedances and voltage gain accuracy. The proposed CCIIs operate at a low supply voltage of ±0.25V which is even lesser than the threshold voltages of a standard MOS transistor. A detailed comparison of proposed circuits with existing CCIIs has been done to highlight the utility of the design. A voltage mode universal filter is presented as an application of the proposed CCII+. All the simulations are performed in 0.18μm CMOS technology.