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

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 mu m 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.