Sebastian Hoppner

We present a low-power, energy efficient 32-bit RISC-V microprocessor unit (MCU) in 22 nm FD-SOI. It achieves ultra-low leakage,even at high temperatures, by using an adaptive reverse body biasing aware sign-off approach, a low-power optimized physical implementation, and custom SRAM macros with retention mode. We demonstrate the robustness of the chip with measurements over the full industrial temperature range, from -40 {\deg}C to 125 {\deg}C. Our results match the state of the art (SOTA) with 4.8 uW / MHz at 50 MHz in active mode and surpass the SOTA in ultra-low-power retention mode.

This paper presents a scalable technique to reduce the power of the analog input stage in neural recording frontends in Globalfoundries 22nm FDSOI. The back-gate voltages are adapted to reduce the threshold voltage and thus allow supply voltage reduction. This adaption increases PVT stability of subthreshold circuits. A comparison to a conventional deltasigma ADC is drawn and the minimum power point is measured, resulting in 0.7 μW/channel at 7.2 μV input-referred noise. Additionally, the transition to smaller technologies promises low power consumption in the digital domain, by allowing smaller supply voltage and higher integration density.

This paper addresses efficient DC-DC converters for neural recording and processing implants in 22 nm FDSOI from a 3.7 V battery supply. Default solution with several supplies is impracticable w.r.t. complex cabling, PCB design and larger form factor. Thus we present a DC-DC which is robust regarding input voltage range and flexible regarding output voltage range. A bandgap-derived output voltage from 0.5 V to 0.8 V is selectable. The battery supply voltage is monitored as an additional safety feature for bio-medical applications. In combination with a neural recording system in 22 nm FDSOI, feasibility of scaling up to 1024 channels with an efficiency of up to 78.4 % is shown.

This brief presents a scalable electrophysiology front-end designed in Globalfoundries 22 nm FDSOI. A very low footprint of 0.018 $mm^{2}$ per channel is achieved. Robust and yet power- and area-efficient digital circuits replace Process-, Supply Voltage- and Temperature-(PVT) sensitive components like high- and low-pass filters. Low-noise amplifiers with different gain are investigated. Depending on the LNA version, input signals of ±1 mV and ±10 mV can be acquired. To reduce offsets in the variable gain amplifier and SAR ADC, a chopping technique is applied. All these approaches combined make the system more robust in small technologies and reduce input-referred noise down to 5.6 $\mu V$ at 1.5 $\mu W$ /ch.

Recent years have witnessed a growing interest in EEG-based wearable classifiers of emotions, which could enable the real-time monitoring of patients suffering from neurological disorders such as Amyotrophic Lateral Sclerosis (ALS), Autism Spectrum Disorder (ASD), or Alzheimer's. The hope is that such wearable emotion classifiers would facilitate the patients’ social integration and lead to improved healthcare outcomes for them and their loved ones. Yet in spite of their direct relevance to neuro-medicine, the hardware platforms for emotion classification have yet to fill up some important gaps in their various approaches to emotion classification in a healthcare context. In this paper, we present the first hardware-focused critical review of EEG-based wearable classifiers of emotions and survey their implementation perspectives, their algorithmic foundations, and their feature extraction methodologies. We further provide a neuroscience-based analysis of current hardware accelerators of emotion classifiers and use it to map out several research opportunities, including multi-modal hardware platforms, accelerators with tightly-coupled cores operating robustly in the near/supra-threshold region, and pre-processing libraries for universal EEG-based datasets.

Sebastian Höppner examines the effects for societates Europaeae based in Germany of the regulations on gender and female quota introduced by the German legislator. The author offers an introduction to the problems that arise due to the integration of SEs into European law and analyzes the compatibility of the created quota regulations with this framework. In formal terms, the focus lies on working out the legislative powers within the framework of a hierarchy of norms prescribed by European law. From a material point of view, the focus of the investigation lies on the analysis of characteristics related to the organizational form of the SE, and their effects with regards to quota regulations. Sebastian Höppner untersucht die Auswirkungen der vom deutschen Gesetzgeber eingeführten Regelungen zur Geschlechter- und Frauenquote auf die Europäische Aktiengesellschaft deutscher Prägung. Der Autor führt dabei in die Probleme, die aufgrund der europarechtlichen Einbindung der SE entstehen, ein und analysiert die Vereinbarkeit der geschaffenen Quotenregelungen mit diesem Regelungsgeflecht. Dabei liegt in formeller Hinsicht der Fokus auf der Herausarbeitung der Gesetzgebungskompetenz im Rahmen der europarechtlich vorgegeben Normenhierarchie. In materieller Hinsicht liegt der Schwerpunkt der Untersuchung auf der Analyse der organisationsformbedingten Besonderheiten der SE und deren Auswirkungen im Hinblick auf die Quotenregelungen.

Sebastian Höppner examines the effects for societates Europaeae based in Germany of the regulations on gender and female quota introduced by the German legislator. The author offers an introduction to the problems that arise due to the integration of SEs into European law and analyzes the compatibility of the created quota regulations with this framework. In formal terms, the focus lies on working out the legislative powers within the framework of a hierarchy of norms prescribed by European law. From a material point of view, the focus of the investigation lies on the analysis of characteristics related to the organizational form of the SE, and their effects with regards to quota regulations. Sebastian Höppner untersucht die Auswirkungen der vom deutschen Gesetzgeber eingeführten Regelungen zur Geschlechter- und Frauenquote auf die Europäische Aktiengesellschaft deutscher Prägung. Der Autor führt dabei in die Probleme, die aufgrund der europarechtlichen Einbindung der SE entstehen, ein und analysiert die Vereinbarkeit der geschaffenen Quotenregelungen mit diesem Regelungsgeflecht. Dabei liegt in formeller Hinsicht der Fokus auf der Herausarbeitung der Gesetzgebungskompetenz im Rahmen der europarechtlich vorgegeben Normenhierarchie. In materieller Hinsicht liegt der Schwerpunkt der Untersuchung auf der Analyse der organisationsformbedingten Besonderheiten der SE und deren Auswirkungen im Hinblick auf die Quotenregelungen. Sebastian Höppner examines the effects for societates Europaeae based in Germany of the regulations on gender and female quota introduced by the German legislator. The author offers an introduction to the problems that arise due to the integration of SEs into European law and analyzes the compatibility of the created quota regulations with this framework. In formal terms, the focus lies on working out the legislative powers within the framework of a hierarchy of norms prescribed by European law. From a material point of view, the focus of the investigation lies on the analysis of characteristics related to the organizational form of the SE, and their effects with regards to quota regulations. Sebastian Höppner untersucht die Auswirkungen der vom deutschen Gesetzgeber eingeführten Regelungen zur Geschlechter- und Frauenquote auf die Europäische Aktiengesellschaft deutscher Prägung. Der Autor führt dabei in die Probleme, die aufgrund der europarechtlichen Einbindung der SE entstehen, ein und analysiert die Vereinbarkeit der geschaffenen Quotenregelungen mit diesem Regelungsgeflecht. Dabei liegt in formeller Hinsicht der Fokus auf der Herausarbeitung der Gesetzgebungskompetenz im Rahmen der europarechtlich vorgegeben Normenhierarchie. In materieller Hinsicht liegt der Schwerpunkt der Untersuchung auf der Analyse der organisationsformbedingten Besonderheiten der SE und deren Auswirkungen im Hinblick auf die Quotenregelungen. Sebastian Höppner examines the effects for societates Europaeae based in Germany of the regulations on gender and female quota introduced by the German legislator. The author offers an introduction to the problems that arise due to the integration of SEs into European law and analyzes the compatibility of the created quota regulations with this framework. In formal terms, the focus lies on working out the legislative powers within the framework of a hierarchy of norms prescribed by European law. From a material point of view, the focus of the investigation lies on the analysis of characteristics related to the organizational form of the SE, and their effects with regards to quota regulations. Sebastian Höppner untersucht die Auswirkungen der vom deutschen Gesetzgeber eingeführten Regelungen zur Geschlechter- und Frauenquote auf die Europäische Aktiengesellschaft deutscher Prägung. Der Autor führt dabei in die Probleme, die aufgrund der europarechtlichen Einbindung der SE entstehen, ein und analysiert die Vereinbarkeit der geschaffenen Quotenregelungen mit diesem Regelungsgeflecht. Dabei liegt in formeller Hinsicht der Fokus auf der Herausarbeitung der Gesetzgebungskompetenz im Rahmen der europarechtlich vorgegeben Normenhierarchie. In materieller Hinsicht liegt der Schwerpunkt der Untersuchung auf der Analyse der organisationsformbedingten Besonderheiten der SE und deren Auswirkungen im Hinblick auf die Quotenregelungen.

A 0.5V ultra-low voltage Arm Cortex-M4F MCU in a 22nm FDSOI technology with 512kB SRAM and 140MHz operating frequency with 11.5μW/MHz is presented. An all-digital closed-loop continuous adaptive body biasing with individual P and N compensation and low ripple less than 30mV enables target performance from -400C to 1250C and over full process corner range. The MCU has been implemented using an adaptive body bias aware implementation flow, which considers the corner tightening during implementation and sign-off for improved power, performance and area.