1. Institute of Bioelectronics
(PGI-8/ICS-8) and JARA—Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425 Jülich, Germany
2. Neuroelectronics,
IMETUM, Department of Electrical and Computer Engineering, Technical University of Munich (TUM), Boltzmannstrasse 11, 85748 Garching, Germany