0.5V bulk-driven analog building blocks
Basic analog building blocks, such as voltage follower (VF), second generation Current Conveyor (CCII), and Current Feedback Operational Amplifier (CFOA), capable for operating under 0.5V supply voltage, are introduced in this paper. The input stage of the proposed blocks is based on bulk-driven pMOS devices, and simultaneously offers the advantages of almost rail-to-rail input/output voltage swing and capability for operation under the extremely low supply voltage. Their performances have been evaluated and compared through simulation results using a standard 0.18?m n-well process. The bandwidth of the voltage and current followers for both CCII and CFOA is 11MHz and 10MHz, respectively. The power consumption of CCII and CFOA is 30?W and 50?W, respectively.
voltage followers current conveyors current feedback operational amplifiers input stages low-voltage circuits analog filters bulk-driven transistors