M.Sc. Ahmed Abdelaal

Ahmed Abdelaal erhielt 2016 den B. Sc-Abschluss in Elektrotechnik von der Deutschen Universität Kairo (GUC), Ägypten. Anschließend erhielt er 2018 den M.Sc.-Abschluss von der Universität Ulm, Deutschland, wo er derzeit unter der Leitung von Professor Dr. Ing. an seiner Promotion arbeitet. Maurits Ortmanns. Sein Forschungsinteresse gilt Hochgeschwindigkeits-Sigma-Delta-Modulatoren mit kontinuierlicher Zeit.


Studentische Arbeiten

[mt] = Masterarbeit, [rp] = Bachelorarbeit

Abgeschlossene Arbeiten

  • Santiago Noriega-Alvarez
    Negative-Resistance Assisted Amplifier [mt]
  • Fouad Elbadry
    Automated Opamp design using Cadence-Virtuoso Optimization Tool [rp]
  • Omar Ismail
    Dual quantization CT-Sigma-Delta ADC for wide-band applications [mt]

Publikationen

2025

15.
J. Conrad, S. Wilhelmstätter, H. Mandry, P. Kässer, A. Abdelaal, R. Asthana, V. Belagiannis and M. Ortmanns, "PSumSim: A Simulator for Partial-Sum Quantization in Analog Matrix-Vector Multipliers", IEEE International Symposium on Circuits and Systems (ISCAS), London, United Kingdom, Mai 2025.
DOI:10.1109/ISCAS56072.2025.11043442
14.
J. Conrad, S. Wilhelmstätter, H. Mandry, P. Kässer, A. Abdelaal, R. Asthana, V. Belagiannis and M. Ortmanns, "PSumSim: A Simulator for Partial-Sum Quantization in Analog Matrix-Vector Multipliers", IEEE International Symposium on Circuits and Systems (ISCAS), London, United Kingdom, pp. 1-5, Mai 2025.
DOI:10.1109/ISCAS56072.2025.11043442
13.
M. Dalla Longa, F. Conzatti, O. Ismail, A. Abdelaal, J. G. Kauffman and M. Ortmanns, "A 470-μW, 102.6-dB DR, 20-kHz BW Calibration-Free ΔΣ Modulator With SFDR in Excess of 110 dBc Using an Intrinsically Linear 13-Level DAC", IEEE Journal of Solid-State Circuits ( Early Access ), Page(s): 1 - 0, Apr. 2025.
DOI:10.1109/JSSC.2025.3553310
12.
D. -. Wiens, A. Abdelaal, B. Driemeyer, J. Becker, J. G. Kauffman and M. Ortmanns, "A Direct Digitizing, 1MHz Bandwidth, 28fA/√Hz Current Sensing Front-End Based on a Mixed-Signal Integrator-Differentiator TIA in 28nm CMOS", IEEE Custom Integrated Circuits Conference (CICC), Boston, MA, USA, Apr. 2025.
DOI:10.1109/CICC63670.2025.10983397

2024

11.
A. Abdelaal, M. Pietzko, J. G. Kauffman, A. Jain and M. Ortmanns, "ΔΣ Modulators Employing MASH DSM DAC-Based Dual Quantization", IEEE Transactions on Circuits and Systems I: Regular Papers ( Volume: 72, Issue: 1, Page(s) 71-84, January 2025), Aug. 2024.
DOI:10.1109/TCSI.2024.3448224
10.
A. Abdelaal, M. Pietzko, J. Ungethüm, J. G. Kauffman and M. Ortmanns, "Using Negative-R Assisted Integrators in Wide-band Delta-Sigma Modulators", IEEE International Symposium on Circuits and Systems (ISCAS), Singapore, Jul. 2024.
DOI:10.1109/ISCAS58744.2024.10558442
9.
M. Pietzko, J. Ungethüm, A. Abdelaal, J. G. Kauffman and M. Ortmanns, "A 600MS/s 10-bit SAR ADC with unit via-based delta-length C-DAC in 22nm FDSOI", IEEE International Symposium on Circuits and Systems (ISCAS), Singapore, Mai 2024.
DOI:10.1109/ISCAS58744.2024.10558087

2023

8.
J. Ungethüm, M. Pietzko, A. Abdelaal, J. G. Kauffman and M. Ortmanns, "A Chopped 6-bit 1.6 GS/s SAR ADC Utilizing Slow Decision Information in 22 nm FDSOI", ESSCIRC 2023- IEEE 49th European Solid State Circuits Conference (ESSCIRC), Sep. 2023.
DOI:10.1109/ESSCIRC59616.2023.10268704

2022

7.
M. A. Mokhtar, A. Abdelaal, M. Sporer, J. Becker, J. G. Kauffman and M. Ortmanns, "A 0.9-V DAC-Calibration-Free Continuous-Time Incremental Delta-Sigma Modulator Achieving 97-dB SFDR at 2 MS/s in 28-nm CMOS", IEEE Journal of Solid-State Circuits, Volume: 57, Issue: 11, Nov. 2022.
DOI:10.1109/JSSC.2022.3160325

2021

6.
A. Abdelaal, M. Pietzko, M. A. Mokhtar, J. G. Kauffman and M. Ortmanns, "FIR filter with Symmetric Non-Equal Coefficients for CT Delta-Sigma Modulators", IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea (Online), Mai 2021.
5.
M. Pietzko, J. Wagner, A. Abdelaal, J. G. Kauffman and M. Ortmanns, "Influence of Excess Loop Delay on the STF of Continuous-Time Delta-Sigma Modulators", IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea (Online), Mai 2021.
4.
M. A. Mokhtar, A. Abdelaal, M. Sporer, J. Becker, J. G. Kauffman and M. Ortmanns, "A 0.9-V Calibration-Free 97dB-SFDR 2-MS/s Continuous­Time Incremental Delta-Sigma ADC Utilizing Variable Bit-Width Quantizer in 28nm CMOS", IEEE Custom Integrated Circuits Conference (CICC), Texas, USA (Virtual), Apr. 2021.

2020

3.
A. Abdelaal, J. G. Kauffman, M. A. Mokhtar and M. Ortmanns, "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, Okt. 2020.
2.
M. A. Mokhtar, P. Vogelmann, A. Abdelaal, J. G. Kauffman and M. Ortmanns, "FIR DACs in CT Incremental Delta-Sigma Modulators", IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain, Okt. 2020.

2019

1.
A. Jain, A. Abdelaal and M. Ortmanns, "Effective Filtering of Requantization Error in Dual Quantized CTDSM using FIR DAC", IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan, pp. 1-5., Mai 2019.

Wissenschaftl. Mitarbeiter

Ahmed Abdelaal