Guest Editorial: Special Issue on Selected Papers From IEEE BioCAS 2021

The eight papers in this special issue were presented at the 2021 IEEE Biomedical Circuits and Systems Conference (BioCAS) in Berlin, Germany, from October 6–9, 2021. BioCAS 2021 was jointly sponsored by the IEEE Circuits and Systems (CAS) Society, IEEE Solid-State Circuits (SSC) Society, and the IEEE Engineering in Medicine and Biology (EMB) Society.