An Operational Amplifier with Recycling Folded Cascode Topology and Adaptive Biasing

摘要

This paper presents a highly adaptive operational amplifier with high gain, high bandwidth, high speedand low power consumption. By adopting the recycling folded cascode topology along with an adaptivebiasingcircuit, this design achieves high performance in terms of gain-bandwidth product (GBW) and slewrate (SR). This single stage op-amp has been designed in 0.18μm technology with a power supply of 1.8Vand a 5pF load. The simulation results show that the amplifier achieved a GBW of 335.5MHz, Unity GainBandwidth of 247.1MHz and a slew rate of 92.8V/μs.