Institute of Microelectronics

M.Sc. Michael Pietzko

I studied electrical engineering at Saarland University, where I received my B.Sc. degree in October 2016. I continued my studies at the University of Ulm, where I received my M.Sc. degree in January 2020. From October 2018 to March 2019, I worked as an intern in the ASIC Design group at the Robert Bosch Research and Technology Center (Sunnyvale, CA). The topic of my Master thesis was ''Highly Linear Gm-C based Sigma Delta Modulator''.

In February 2020 I started working towards my Ph.D. degree at the Institute of Microelectronics at the University of Ulm under the supervision of Prof. Dr.-Ing. Maurits Ortmanns. My current research interest is in the field of ultra-low power continuous-time Sigma-Delta analog-to-digital converters.

Student theses

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

Past theses

  • Sherif Elsayed
    Calibration of High-Speed Time-Interleaved ADCs [mt]
  • Mohamed Mahmoud
    Investigation of Time-Interleaving in Noise-Shaped SAR ADCs [mt]
  • Julian Spiess
    Power Efficient Delta-Sigma Modulator with Bitwise ELD Compensation [mt]

Publications

2024

10.
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
9.
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
8.
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, May 2024.
DOI:10.1109/ISCAS58744.2024.10558087

2023

7.
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
6.
M. Pietzko, J. Spiess, J. Ungethüm, J. G. Kauffman, Q. Li and M. Ortmanns, "Bitwise ELD Compensation under Integrator Nonidealities in ΔΣ Modulators", 21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, United Kingdom, Jun. 2023.
DOI:10.1109/NEWCAS57931.2023.10198050
5.
M. Pietzko, J. Ungethüm, J. G. Kauffman and M. Ortmanns, "Delay Error Shaping in ΔΣ Modulators Using Time-Interleaved High Resolution Quantizers", IEEE Transactions on Circuits and Systems I: Regular Papers, May 2023.
DOI:10.1109/TCSI.2023.3269573

2022

4.
M. Pietzko, J. Ungethüm, J. G. Kauffman, Q. Li and M. Ortmanns, "Bitwise ELD Compensation in ∆Σ Modulators", IEEE International Symposium on Circuits and Systems (ISCAS), Austin, USA, May 2022.
DOI:10.1109/ISCAS48785.2022.9937305
3.
J. Ungethüm, M. Pietzko, J. G. Kauffman, Q. Li and M. Ortmanns, "Maximizing the Inter-Stage Gain in CT 0-X MASH Delta-Sigma-Modulators", IEEE International Symposium on Circuits and Systems (ISCAS), Austin, TX, USA, May 2022.
DOI:10.1109/ISCAS48785.2022.9937739

2021

2.
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), May 2021.
1.
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), May 2021.

Research Assistent

Michael Pietzko