Browsing Publikationen by Institution "Institut für Mikroelektronik"
Now showing items 1-16 of 16
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A high speed/high linearity continuous-time delta-sigma modulator
Dissertation(Universität Ulm, 2017-12-01)Modern wireless communication systems demand wideband ADCs with high resolution and high linearity. Among different ADC topologies, CT Delta Sigma modulators are very popular due to inherent anti-aliasing filtering and ... -
An Arbiter PUF employing eye-opening oscillation for improved noise suppression
Beitrag zu einer Konferenz(Universität Ulm, 2018-05-04)Like every integrated circuit, Arbiter-PUFs suffer from any ambience variations such as electrical noise, supply voltage variations and temperature fluctuations. In this work, we show that most bit-errors are related to ... -
An evaluation study of various excitation signals for electrical impedance spectroscopy
Beitrag zu einer Konferenz(Universität Ulm, 2019-05-01)Electrical Impedance Spectroscopy (EIS) is a popular method for investigating tissue properties. Implementing the signal generator for EIS measurements with a suitable excitation signal type is thereby one of the two system ... -
An integrated readout for current sensing based on a delta sigma modulator with switched capacitor feedback
Beitrag zu einer Konferenz(Universität Ulm, 2019-11-18)This work presents a current input continuous-time sigma-delta modulator (C-CTSDM) for biomedical application such as electrochemical impedance spectroscopy. Low noise and low area current input digitizers are required to ... -
Comparison of direct digitization current sensing circuits for EIS
Beitrag zu einer Konferenz(Universität Ulm, 2019-08-05)In this work, a qualitative comparison between state of the art current recorders for biomedical applications is presented. Prior work showed that direct digitizing frontends outweight their analog counterparts. This work ... -
Comparison study of integrated potentiostats : Resistive-TIA, Capacitive-TIA, CT ΣΔ Modulator
Beitrag zu einer Konferenz(Universität Ulm, 2018-05-04)In this paper, a comparison between three different current readouts for micro-potentiostats is presented: resistive transimpedance amplifier (R-TIA), capacitive transimpedance amplifier (C-TIA), and current-mode continuous-time ... -
Concept and design of a high speed current mode based SAR ADC
Dissertation(Universität Ulm, 2016-07-20)There is continuous research to exploit the improved speed of scaled CMOS technologies in realizing high-speed analog-to-digital converters and SAR ADCs are one of the candidates which can significantly benefit from this ... -
Enhanced Arbiter PUFs using custom sized structures for reduced noise sensitivity
Beitrag zu einer Konferenz(Universität Ulm, 2019-08-14)This paper presents a simple yet effective way of improving delay based Physical Unclonable Functions by changing transistor gate sizes only. All utilized components of an Arbiter PUF were simulated in a 90nm CMOS process ... -
Evaluation of single-bit sigma-delta modulator DAC for electrical impedance spectroscopy
Beitrag zu einer Konferenz(Universität Ulm, 2017-03-29)In this paper, single-bit sigma-delta modulator based digital-analog conversion (DAC) is evaluated as potential driver in multichannel electrical impedance spectroscopy (EIS) arrays. The sinusoidal excitation with typical ... -
Exploiting Weak PUFs from Data Converter Non-Linearity - E.g. A multibit CT ∆Σ Modulator
Wissenschaftlicher Artikel(Universität Ulm, 2019-08-14)This paper presents a novel approach of deriving Physical Unclonable Functions (PUF) from correction circuits measuring and digitizing non-linearities of data converters. The often digitally available correction data can ... -
Fully integrated, multichannel IC for brain machine interfaces
Dissertation(Universität Ulm, 2019-10-25)The rapid progress of technology in the semiconductor industry over the last decades allowed the development of a whole new generation of fully integrated neuromodulators. By an increase in the level of integration, new ... -
High linearity Sigma-Delta-enhanced SAR ADCs
Dissertation(Universität Ulm, 2019-06-11)SAR ADCs recorded the highest power efficiency in the last decade, while employing a simple architecture and making a perfect use of the advanced digital capabilities in modern deeply-scaled CMOS technologies. Recently, ... -
In-depth Analysis and Enhancements of RO-PUFs with a Partial Reconfiguration Framework on Xilinx Zynq-7000 SoC FPGAs
Beitrag zu einer Konferenz(Universität Ulm, 2019-08-14)Physical unclonable functions (PUFs) are excellent candidates to generate secret information on-chip without the need for secure storage. Ring-oscillator (RO) based PUFs have been receiving great attention over the years ... -
Methoden zur Verbesserung von CMOS integrierten Arbiter-PUFs
Beitrag zu einer Konferenz(Universität Ulm, 2019-08-16)In diesem Beitrag wird eine Auswahl von Methoden zur Verbesserung integrierter CMOS PUFs vorgestellt. Am Beispiel der Arbiter-PUF zeigen wir, dass sowohl die PUF-definierenden Zufallsquellen erheblich optimiert werden ... -
Modular PUF coding chain with high-speed Reed-Muller decoder
Beitrag zu einer Konferenz(Universität Ulm, 2019-05-01)Physical Unclonable Functions (PUFs) offer the possibility to produce unique fingerprints for integrated circuits. As raw PUF responses are affected by noise, some post-processing steps are necessary. We present a coding ... -
Pulse modulation techniques for switched-mode transmitter
Dissertation(Universität Ulm, 2016-04-25)Nowadays more and more communication devices incorporate multiple transceivers operating in different frequency bands. To reduce form factor and power consumption of such devices, a fully digital, multi-standard, multiband ...