Our research in analog-to-digital converters (ADC) focuses on architectural and circuit innovations in Delta-Sigma and other types of ADCs. Both incremental and free-running Delta-Sigma modulators are a center-piece of our research work. Thereby, enhanced power efficiency and (intrinsically) high linearity are goals of our innovation.
The target applications involve high-resolution biomedical implants and sensor readouts, as well as wideband applications for communication and radar. Furthermore, we research towards design methodologies for Delta-Sigma modulators including an online design environment www.sigma-delta.de
J. Ungethüm: Continuous-Time (CT) Analog-to-Digital Converters (ADCs) have become ubiquitous in state-of-the-art (SoA) communication systems thanks to their achievable conversion speed, resolution and power efficiency. Recently, CT pipelined ADCs have gained interest in the research community ... [more]
M. Pietzko: Continuous-time delta sigma modulators (CT-DSMs) have recently become the key device for broadband wireless and wireline communication. Due to their built in anti-aliasing filter and the ability to have relaxed sampling requirements the CTDS modulators are preferred over their discrete-time counterparts. ... [more]
D.-P. Wiens: Precise current-sensing front-ends are essential in many bioelectronic and electrochemical sensing applications. These systems often have stringent requirements for low noise and high bandwidth performance. Low noise is essential to ensure high sensitivity, while wide bandwidth is required to capture rapidly changing AC signals ... [more]
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]
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]
A. Abdelaal: 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]
