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
B. Zaky: Continuous-Time Delta-Sigma Modulators (CTDSMs) have recently become essential in both wireless and wired broadband communications. Their inherent anti-aliasing capabilities and ability to meet relaxed sampling requirements make them preferable to their discrete-time counterparts ... [more]
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]
