M.Sc. Mohamed Aly Mokhtar

Mohamed Aly Mokhtar studied communication technology and electronics from University of Ain-Shams in Cairo, Egypt. He received his B.Sc. degree in 2012. In 2014, he moved to Ulm, Germany to pursue his master degree, where electronics subjects were his main interest. He received his M.Sc. degree in 2017. The topic of his Master thesis was "Design and Implementation of a Power Optimized Incremental Sigma-Delta Modulators".

During his master studies, he did an internship in Fraunhofer IIS in Erlangen, Germany, where he fully designed a Sigma-Delta modulator for resistive sensor applications.

Since October 2017, he is working towards his Ph.D. degree under the supervision of Professor Dr.-Ing. Maurits Ortmanns. His research interest is in the field of power-optimized high-resolution incremental Sigma-Delta analog-to-digital converters.


High-Resolution, Efficient Incremental Sigma-Delta Modulators

M. Mokhtar: 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]

Students theses

[mt] =Master theses  [rp] = Bachelor theses

Past theses

  • Michael Pietzko
    Highly Linear Gm C based Sigma Delta Modulator [mt]
  • Roman Dorsch
    Analysis of CT Incremental Sigma-Delta ADCs with low Oversampling Ratios [mt]
  • Martin Merkle
    Analysis of Sigma-Delta Modulators based on Single Opamp Resonators [mt]
  • Mohamed Atef Hassan
    Optimization of a Continuous-Time Incremental ΣΔ ADC [mt]



Abdelaal, A.; Pietzko, M.; Mokhtar, M.; Kauffman, J. G.; Ortmanns, M.
FIR filter with Symmetric Non-Equal Coefficients for CT Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea (Online)
May 2021


Abdelaal, A.; Kauffman, J. G.; Mokhtar, M.; Ortmanns, M.
A Comparative Study of ISI Errors in Different DAC Structures for CT Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
Mokhtar, M.; Vogelmann, P.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
FIR DACs in CT Incremental Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
Conrad, J.; Vogelmann, P.; Mokhtar, M.; Ortmanns, M.
Design Approach for Ring Amplifiers
IEEE Transactions on Circuits and Systems I: Regular Papers
April 2020


Mokhtar, M.; Vogelmann, P.; Haas, M.; Ortmanns, M.
A 94.3 dB SFDR, 91.5 dB DR, 200 kS/s CT Incremental Delta-Sigma Modulator with Differentially Reset FIR Feedback
IEEE Solid-State Circuits Letter, September 2019 - Presented on IEEE European Solid-State Circuits conference (ESSDERC/ESSCIRC), Krakow, Poland
September 2019
Mokhtar, M.; Vogelmann, P.; Wagner, J.; Ortmanns, M.
Incremental Sturdy-MASH Sigma-Delta Modulator with Reduced Sensitivity to DAC Mismatch
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan
May 2019


Mokhtar, M.; Ortmanns, M.
Study of Single Opamp Resonators in CT Sigma-Delta Modulators
Analogworkshop 2018, Albert-Ludwigs-Universität Freiburg, Germany
March 2018

Research Assistent

Mohamed Aly Mokhtar