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]
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]
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]
