0.3 V Differential Difference Current Conveyor Using Multiple-Input Bulk-Driven Technique

Abstract

This paper presents a new ultra-low voltage and ultra-low power differential difference current conveyor (DDCC) which is suitable for portable electronic applications. The proposed DDCC uses the subthreshold technique to reduce the power consumption and the bulk-driven technique to obtain a rail-to-rail input common-mode swing. Unlike previous DDCCs, the multiple-input bulk-driven technique is used in the proposed DDCC to reduce the number of transistors and to achieve the compactness. The proposed DDCC was designed using 0.18 µm TSMC CMOS technology with 0.3 V power supply and 38 nW power consumption. To confirm the workability of the new active device, a third-order elliptic filter using the proposed DDCCs as active device has been introduced as an application example. The proposed DDCC and its application have been designed and simulated in Cadence/Specter environment, and the simulated results prove the functionality and the attractive results of the new circuits.