Circuit Design and Verification of On-Chip Femto-Ampere Current Mode Circuit Using 0.18/spl mu/m CMOS Technology

Recently, femto-ampere current mode circuit (FCMC) implemented in modern CMOS technology is in high demand in areas like integrated bio-sensor research and production, ultra low current analysis and detection, gauging instrument design and manufacturing and etc. In this paper, on-chip circuit modules in FCMC including femto-ampere current mirror (FCM) and generator (FCG), femto-ampere current mode amplifier (FCMA) and its differential structure, as well as the on-chip femto-ampere current reference (FCR) have been presented and verified in SMIC 0.18mum CMOS process by using proposed deep subthreshold MOSFET (DSMOS) technique. Meanwhile, optimization of DSMOS dimensions has also been actualized to diminish low frequency noises and leakages