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

8.
Pietzko, M.; Ungethüm, 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:10.1109/ISCAS58744.2024.10558087

2023

7.
Ungethüm, 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:10.1109/ESSCIRC59616.2023.10268704
6.
Pietzko, M.; Spiess, J.; Ungethüm, J.; Kauffman, J. G.; Li, Q.; Ortmanns, M.
Bitwise ELD Compensation under Integrator Nonidealities in ΔΣ Modulators
21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, United Kingdom
June 2023
DOI:10.1109/NEWCAS57931.2023.10198050
5.
Pietzko, M.; Ungethüm, J.; Kauffman, J. G.; Ortmanns, M.
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.
Pietzko, M.; Ungethüm, J.; Kauffman, J. G.; Li, Q.; Ortmanns, M.
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.
Ungethüm, J.; Pietzko, M.; Kauffman, J. G.; Li, Q.; Ortmanns, M.
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.
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
1.
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

Research Assistent

Michael Pietzko