Current Projects

High-Resolution, Efficient Incremental Sigma-Delta Modulators

M. Mokhtar, O. Ismail: Sigma-Delta (ΣΔ) ADCs are suitable for various applications, due to its oversampling and noise-shaping behavior, thus high resolutions can be achieved independent on the matching accuracy of the analog components. For multiplexed applications, where an ADC is used to digitize the input coming from multi-channels ... [more]

Ultra-low Power, Wide Bandwidth Continuous-time Sigma Delta Analog to Digital Converter Design

A. Abdelaal, M. Pietzko: Continues time delta sigma modulators (CTDS) have recently become the key device for broadband wireless and wireline communication.  Due to there built in anti-aliasing filter and the ability to have relaxed sampling requirements the CTDS modulators are preferred over there discrete time counterparts ... [more]

Physical Unclonable Functions (PUFs)

H. Mandry: Over the last decade, Physical Unclonable Functions (PUF) became a topic of increasing interest in cryptographic and authentication applications. Utilizing physical variations in the silicon resulting from limited fabrication accuracy, PUFs offer great characteristics for this field namely uniqueness, unpredictability and unclonability. When stimulated with a digital input, they generate an individual digital response based on their unique mismatches ... [ mehr]


Online Tool for Rapid Continuous-Time ΣΔ Modulator Design

P. Kässer: ΣΔ A/D converters are the state of the art for many different applications. The basis for this type of A/D converter is the ΣΔ modulator. For a long time, discrete-time (DT) ΣΔ modulators dominated as their design techniques could easily be adopted to ensured high performance... [ more]

CMOS Circuits for Multi-Channel, Bidirectional Neural Interfaces

S. Reich, M. Sporer: Bidirectional, neural interfaces are a tool which is widely used in the study of the complex interconnections between neurons within the brain. To understand the activity of neural cells, nervous tissue is first stimulated with a current or voltage signal and afterwards its electrical activity is observed ... [more]

Adaptable Architectures for Microcontroller Devices

E. Schubert: Modern distributed control systems (such as Cyber-Physical Systems) require microelectronic devices to quickly adapt. With a focus on techniques for implementing different I/O standards -- analog and digital -- in off-the-shelf devices such as FPGAs, we look into optimizing the whole path including signal-conditioning for sensor inputs, processing and visualization, power circuitry for driving actuators ... [more]

Circuit design for a subretinal stimulator

S. Moll, H. Schütz, R. Steinhoff: In this project we develop CMOS circuits optimized for the usage in medical implants. The emphasis is on low-power, optimized silicon area, and optimized performance ... [more]