Institut für Mikroelektronik

M.Sc. Omar Ismail

Omar Ismail erhielt 2019 seinen B. Sc-Abschluss in Elektrotechnik an der "German University of Cairo" (GUC), Ägypten. Anschließend absolvierte er 2021 das Masterstudium "Kommunikationstechnologie" an der Universität Ulm, Deutschland, wo er am Institut für Mikroelektronik sein Masterprojekt zu Dual-Quantisierungs-Sigma-Delta-ADCs abschloss.

Seit November 2021 arbeitet er dort an seiner Promotion im Bereich hochauflösender inkrementeller Sigma-Delta A/D-Wandler unter der Leitung von Prof. Dr.-Ing. Maurits Ortmanns.

Studentische Arbeiten

[mt] = Masterarbeit, [rp] = Bachelorarbeit

Abgeschlossene Arbeiten

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

Publikationen

2025

15.
P. Kässer, O. Ismail, J. Becker and M. Ortmanns, "Compensation of Excess Loop Delay in Continuous-Time Incremental ∆Σ ADCs", IEEE International Symposium on Circuits and Systems (ISCAS), London, United Kingdom, pp. 1-5, Mai 2025.
DOI:10.1109/ISCAS56072.2025.11044169
14.
P. Kässer, O. Ismail, J. Becker and M. Ortmanns, "Does the Maximum Stable Amplitude depend on Reconstruction Filters in Incremental ∆Σ ADCs?", IEEE International Symposium on Circuits and Systems (ISCAS), London, United Kingdom, pp. 1-5, Mai 2025.
DOI:10.1109/ISCAS56072.2025.11043924
13.
O. Ismail, P. Kässer, M. Sporer, J. G. Kauffman and M. Ortmanns, "Incremental ∆Σ ADCs without Periodic Reset", IEEE International Symposium on Circuits and Systems (ISCAS), London, United Kingdom, pp. 1-5, Mai 2025.
DOI:10.1109/ISCAS56072.2025.11043980
12.
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
11.
O. Ismail, P. Kässer and M. Ortmanns, "Reducing the Impact of Non-Idealities on Incremental Δ∑ ADCs by Reconfiguration: A Review", IEEE Custom Integrated Circuits Conference (CICC), Boston, MA, USA, pp. 1-8, Apr. 2025.
DOI:10.1109/CICC63670.2025.10983744

2024

10.
M. Dalla Longa, F. Conzatti, O. Ismail, J. G. Kauffman and M. Ortmanns, "A 470μW, 102.6dB-DR, 20kHz BW Calibration-Free ΔΣ Modulator with SFDR in Excess of 110dBc using an Intrinsically Linear 13-Level DAC", IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits), Honolulu, HI, USA, 2024, pp. 1-2, Jun. 2024.
DOI:10.1109/VLSITechnologyandCir46783.2024.10631405
9.
P. Kässer, O. Ismail, D. -. Wiens and M. Ortmanns, "Offset Cancellation in Incremental ∆Σ ADCs", IEEE International Symposium on Circuits and Systems (ISCAS), Singapore, Mai 2024.
DOI:10.1109/ISCAS58744.2024.10557952
8.
P. Kässer, S. Kaltenstadler, J. Conrad, J. Wagner, O. Ismail and M. Ortmanns, "Stability Prediction of Δ∑ Modulators using Artificial Neural Networks", IEEE International Symposium on Circuits and Systems (ISCAS), Singapore, Mai 2024.
DOI:10.1109/ISCAS58744.2024.10557868
7.
P. Kässer, J. Wagner, O. Ismail and M. Ortmanns, "Inner Transfer Functions in Incremental ΔΣ ADCs", IEEE Transactions on Circuits and Systems II: Express Briefs, Apr. 2024.
DOI:10.1109/TCSII.2024.3390397
6.
O. Ismail, P. Kässer, J. G. Kauffman and M. Ortmanns, "Non-Ideal Reset in Incremental Delta-Sigma ADCs", IEEE 22nd Interregional NEWCAS Conference Sherbrooke, Quebec, Canada, Apr. 2024.
5.
O. Ismail, P. Kässer, J. G. Kauffman and M. Ortmanns, "DAC Element Mismatch Shaping Algorithms in Incremental Delta-Sigma ADCs", IEEE International Symposium on Circuits and Systems (ISCAS), Singapore, Jan. 2024.
DOI:10.1109/ISCAS58744.2024.10558337

2023

4.
P. Kässer, J. Wagner, O. Ismail, B. Driemeyer and M. Ortmanns, "Quantizer Gain in Incremental Delta-Sigma ADCs", 30th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Istanbul, Turkiye, pp. 1-4, Dez. 2023.
DOI:10.1109/ICECS58634.2023.10382904
3.
P. Kässer, O. Ismail, J. Wagner, R. Fischer and M. Ortmanns, "Frequency-Domain Analysis of Reconfigured Incremental ΔΣ ADCs on the Example of the Exponential Phase", IEEE Transactions on Circuits and Systems I: Regular Papers, Sep. 2023.
DOI:10.1109/TCSI.2023.3310655
2.
M. A. Mokhtar, O. Ismail, P. Vogelmann, J. G. Kauffman and M. Ortmanns, "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, Sep. 2023.
DOI:10.1109/ESSCIRC59616.2023.10268735
1.
P. Kässer, O. Ismail, C. Rudorf, J. Wagner and M. Ortmanns, "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.
DOI:10.1109/ISCAS46773.2023.10182215

Wissenschaftl. Mitarbeiter

Omar Ismail