午夜探花

Institute of Microelectronics

M.Sc. Ahmed Abdelaal

Ahmed Abdelaal received the B.鈥婼c degree in Electronics Engineering from the German University in Cairo (GUC), Egypt, 2016. Afterwards, he received the M.Sc degree in 2018 from 午夜探花, Germany, where he is currently working towards his PhD under the supervision of Professor Dr.-Ing. Maurits Ortmanns. His research interest is high-speed continuous-time sigma-delta modulators.

Student theses

[mt] = Master thesis, [rp] = Bachelor thesis

Past theses

  • 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]

Publications

2024

11.
Abdelaal, A.; Pietzko, M.; Kauffman, J. G.; Jain, A.; Ortmanns, M.
螖危 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)
August 2024
DOI:
10.
Abdelaal, A.; Pietzko, M.; Ungeth眉m, J.; Kauffman, J. G.; Ortmanns, M.
Using Negative-R Assisted Integrators in Wide-band Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
July 2024
DOI:
9.
Pietzko, M.; Ungeth眉m, J.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
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
May 2024
DOI:

2023

8.
Ungeth眉m, J.; Pietzko, M.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
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)
September 2023
DOI:

2022

7.
Mokhtar, M. A.; Abdelaal, A.; Sporer, M.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
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
November 2022
DOI:

2021

6.
Abdelaal, A.; Pietzko, M.; Mokhtar, M. A.; 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
5.
Pietzko, M.; Wagner, J.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
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)
May 2021
4.
Mokhtar, M. A.; Abdelaal, A.; Sporer, M.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
A 0.9-V Calibration-Free 97dB-SFDR 2-MS/s Continuous颅Time Incremental Delta-Sigma ADC Utilizing Variable Bit-Width Quantizer in 28nm CMOS
IEEE Custom Integrated Circuits Conference (CICC), Texas, USA (Virtual)
April 2021

2020

3.
Abdelaal, A.; Kauffman, J. G.; Mokhtar, M. A.; 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
2.
Mokhtar, M. A.; 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

2019

1.
Jain, A.; Abdelaal, A.; Ortmanns, M.
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.
May 2019

Research Assistent

Ahmed Abdelaal