Contact
Room: 43.2.252
Tel.: +49 (0)731 50 26216
omar.ismail(at)uni-ulm.de
M.Sc. Omar Ismail
Omar Ismail received his B.Sc degree in Electronics Engineering from the German University of 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.
Student theses
[mt] = Master theses, [rp] = Bachelor theses
Publications
2024
10.
Dalla Longa,
M.;
Conzatti,
F.;
Ismail,
O.;
Kauffman,
J. G.;
Ortmanns,
M.
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
June 2024
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
June 2024
| DOI: | 10.1109/VLSITechnologyandCir46783.2024.10631405 |
9.
Kässer,
P.;
Ismail,
O.;
Wiens,
D.-P.;
Ortmanns,
M.
Offset Cancellation in Incremental ∆Σ ADCs
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
May 2024
Offset Cancellation in Incremental ∆Σ ADCs
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
May 2024
| DOI: | 10.1109/ISCAS58744.2024.10557952 |
8.
Kässer,
P.;
Kaltenstadler,
S.;
Conrad,
J.;
Wagner,
J.;
Ismail,
O.;
Ortmanns,
M.
Stability Prediction of Δ∑ Modulators using Artificial Neural Networks
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
May 2024
Stability Prediction of Δ∑ Modulators using Artificial Neural Networks
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
May 2024
| DOI: | 10.1109/ISCAS58744.2024.10557868 |
7.
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
Inner Transfer Functions in Incremental ΔΣ ADCs
IEEE Transactions on Circuits and Systems II: Express Briefs
April 2024
| DOI: | 10.1109/TCSII.2024.3390397 |
6.
Ismail,
O.;
Kässer,
P.;
Kauffman,
J. G.;
Ortmanns,
M.
Non-Ideal Reset in Incremental Delta-Sigma ADCs
IEEE 22nd Interregional NEWCAS Conference Sherbrooke, Quebec, Canada
April 2024
Non-Ideal Reset in Incremental Delta-Sigma ADCs
IEEE 22nd Interregional NEWCAS Conference Sherbrooke, Quebec, Canada
April 2024
5.
Ismail,
O.;
Kässer,
P.;
Kauffman,
J. G.;
Ortmanns,
M.
DAC Element Mismatch Shaping Algorithms in Incremental Delta-Sigma ADCs
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
January 2024
DAC Element Mismatch Shaping Algorithms in Incremental Delta-Sigma ADCs
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
January 2024
| DOI: | 10.1109/ISCAS58744.2024.10558337 |
2023
4.
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
December 2023
Quantizer Gain in Incremental Delta-Sigma ADCs
30th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Istanbul, Turkiye, pp. 1-4
December 2023
| DOI: | 10.1109/ICECS58634.2023.10382904 |
3.
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
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
| DOI: | 10.1109/TCSI.2023.3310655 |
2.
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
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
| DOI: | 10.1109/ESSCIRC59616.2023.10268735 |
1.
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
May 2023
Linear-Exponential I-DS ADCs: Analysis, Limitations and Higher Order
IEEE International Symposium on Circuits and Systems (ISCAS), Monterey, CA, USA, pp. 1-5
May 2023
| DOI: | 10.1109/ISCAS46773.2023.10182215 |
Research Assistent
