M.Sc. Omar Ismail

Omar Ismail received his B.​Sc degree in Electronics Engineering from the German University in Cairo (GUC), Egypt, 2019. Afterwards, he graduated from the "Communications Technology" master program in 2021 at Ulm University, Germany, where he completed his master project on Dual-Quantization Sigma-Delta ADCs at the Institute of Microelectronics. Since November 2021, he is working there towards his PhD in the field of high-resolution Incremental Sigma-Delta A/D converters under the supervision of Prof. Dr.-Ing. Maurits Ortmanns.


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]

Studentische Arbeiten

[mt] = Masterarbeit, [rp] = Bachelorarbeit

Aktuelle Arbeiten

Abgeschlossene Arbeiten

  • Christian Rudorf
    High Resolution Linear-Exponential Incremental Sigma-Delta ADC [mt]



Kässer, P.; Wagner, J.; Ismail, O.; Ortmanns, M.
Inner Transfer Functions in Incremental ΔΣ ADCs
IEEE Transactions on Circuits and Systems II: Express Briefs
April 2024


Kässer, P.; Wagner, J.; Ismail, O.; Driemeyer, B.; Ortmanns, M.
Quantizer Gain in Incremental Delta-Sigma ADCs
30th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Istanbul, Turkiye, pp. 1-4
Dezember 2023
Kässer, P.; Ismail, O.; Wagner, J.; Fischer, R.; Ortmanns, M.
Frequency-Domain Analysis of Reconfigured Incremental ΔΣ ADCs on the Example of the Exponential Phase
IEEE Transactions on Circuits and Systems I: Regular Papers
September 2023
Mokhtar, M. A.; Ismail, O.; Vogelmann, P.; Kauffman, J. G.; Ortmanns, M.
A 40 kS/sCalibration-Free Incremental △Σ ADC Achieving 104 dB DR and 105.7 dB SFDR
ESSCIRC 2023- IEEE 49th European Solid State Circuits Conference (ESSCIRC), Lisbon, Portugal, pp. 401-404
September 2023
Kässer, P.; Ismail, O.; Rudorf, C.; Wagner, J.; Ortmanns, M.
Linear-Exponential I-DS ADCs: Analysis, Limitations and Higher Order
IEEE International Symposium on Circuits and Systems (ISCAS), Monterey, CA, USA, pp. 1-5
Mai 2023

Wissenschaftl. Mitarbeiter

Omar Ismail