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A. Catania, S. Del Cesta, P. Bruschi, M. Piotto, "Design of current feedback instrumentation amplifiers with rail-to-rail input-output ranges", PhD Research in Microelectronics and Electronics Conference (PRIME), 2017

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System level modeling is applied to a recently proposed indirect current feedback (ICF) chopper instrumentation amplifier based on a Gm-C low pass filter architecture. The aim of the study is solving important limitations of the previous architecture in terms of output range and bandwidth-to-chopper frequency ratio. The possibility of obtaining a rail-to-rail input common mode range is also investigated. An improved architecture is proposed and analyzed by means of simulations that consider the main non-idealities of the building blocks.