Institute of Microelectronics

Publications - Prof. Dr.-Ing. M. Ortmanns

Papers  Books  Patents 

Papers

2025

425.
Kässer, P.; Ismail, O.; Becker, J.; Ortmanns, M.
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
May 2025
DOI:10.1109/ISCAS56072.2025.11044169
424.
Kässer, P.; Ismail, O.; Becker, J.; Ortmanns, M.
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
May 2025
DOI:10.1109/ISCAS56072.2025.11043924
423.
Ismail, O.; Kässer, P.; Sporer, M.; Kauffman, J. G.; Ortmanns, M.
Incremental ∆Σ ADCs without Periodic Reset
IEEE International Symposium on Circuits and Systems (ISCAS), London, United Kingdom, pp. 1-5
May 2025
DOI:10.1109/ISCAS56072.2025.11043980
422.
Conrad, J.; Wilhelmstätter, S.; Mandry, H.; Kässer, P.; Abdelaal, A.; Asthana, R.; Belagiannis, V.; Ortmanns, M.
PSumSim: A Simulator for Partial-Sum Quantization in Analog Matrix-Vector Multipliers
IEEE International Symposium on Circuits and Systems (ISCAS), London, United Kingdom, pp. 1-5
May 2025
DOI:10.1109/ISCAS56072.2025.11043442
421.
Dalla Longa, M.; Conzatti, F.; Ismail, O.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
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
April 2025
DOI:10.1109/JSSC.2025.3553310
420.
Wiens, D.-P.; Abdelaal, A.; Driemeyer, B.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
A Direct Digitizing, 1MHz Bandwidth, 28fA/√Hz Current Sensing Front-End Based on a Mixed-Signal Integrator-Differentiator TIA in 28nm CMOS
IEEE Custom Integrated Circuits Conference (CICC), Boston, MA, USA
April 2025
DOI:10.1109/CICC63670.2025.10983397
419.
Ismail, O.; Kässer, P.; Ortmanns, M.
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
April 2025
DOI:10.1109/CICC63670.2025.10983744
418.
Driemeyer, B.; Mandry, H.; Wiens, D.-P.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
17.5 An Eye-Opening Arbiter PUF for Fingerprint Generation Using Auto-Error Detection for PVT-Robust Masking and Bit Stabilization Achieving a BER of 2e-8 in 28nm CMOS
IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA
February 2025
417.
Mayer, M.; Reich, S.; Mandry, H.; Ortmanns, M.
A Rapid-Prototyping Platform for Active Stents Utilizing Device Decapsulation for Miniaturization
31st IEEE International Conference on Electronics, Circuits and Systems (ICECS)
January 2025
DOI:10.1109/ICECS61496.2024.10848908
416.
Mandry, H.; Driemeyer, B.; Becker, J.; Ortmanns, M.
Investigation of the Influence of Multi-Valued Symbol Extraction on PUF Randomness
31st IEEE International Conference on Electronics, Circuits and Systems (ICECS)
January 2025
DOI:10.1109/ICECS61496.2024.10849251
415.
Aziz, M.; Kässer, P.; Ibrahim, S.; Ortmanns, M.
A Comparative Study of Incremental ΔΣ Analog-to-Digital Converter Architectures with Extended Order and Resolution
MDPI Electronics 2025, 14, 372
January 2025
DOI:10.3390/electronics14020372
414.
Mandry, H.; Ruchti, J.; Nowakowski, J.; Pehl, M.; Ortmanns, M.
Protection of Oscillator-Based PUFs against Side Channel Analyses by Random Interruption
IACR Transactions on Cryptographic Hardware and Embedded Systems, Vol. 2025 No. 2, 460-488
2025
DOI:10.46586/tches.v2025.i2.460-488

2024

413.
Sporer, M.; Graber, N.; Mayer, M.; Reich, S.; Stieglitz, T.; Ortmanns, M.
An ultra-miniaturized Neural Recording μASIC for the NeuroBus Implant
IEEE Biomedical Circuits and Systems Conference (BioCAS), Xi'an, China, pp. 1-5
December 2024
DOI:10.1109/BioCAS61083.2024.10798303
412.
Conrad, J.; Wilhelmstätter, S.; Asthana, R.; Belagiannis, V.; Ortmanns, M.
Differentiable Cost Model for Neural-Network Accelerator Regarding Memory Hierarchy
IEEE Transactions on Circuits and Systems I: Regular Papers ( Early Access )
October 2024
DOI:10.1109/TCSI.2024.3476534
411.
Conrad, J.; Kauffman, J. G.; Wilhelmstätter, S.; Asthana, R.; Belagiannis, V.; Ortmanns, M.
Confidence Estimation and Boosting for Dynamic-Comparator Transient-Noise Analysis
22nd IEEE Interregional NEWCAS Conference (NEWCAS)
September 2024
DOI:10.1109/NewCAS58973.2024.10666354
410.
Abdelaal, A.; Pietzko, M.; Kauffman, J. G.; Jain, A.; Ortmanns, M.
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)
August 2024
DOI:10.1109/TCSI.2024.3448224
409.
Abdelaal, A.; Pietzko, M.; Ungethüm, 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:10.1109/ISCAS58744.2024.10558442
408.
Wilhelmstätter, S.; Conrad, J.; Upadhyaya, D.; Polian, I.; Ortmanns, M.
Enabling Power Side-Channel Attack Simulation on Mixed-Signal Neural Network Accelerators
IEEE International Conference on Omni-Layer Intelligent Systems (COINS), London, UK
July 2024
407.
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
DOI:10.1109/VLSITechnologyandCir46783.2024.10631405
406.
Wiens, D.-P.; Driemeyer, B.; Ortmanns, M.
A Mixed-Signal TIA with Input Restoring ADC
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
May 2024
DOI:10.1109/ISCAS58744.2024.10557979
405.
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
DOI:10.1109/ISCAS58744.2024.10557952
404.
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
DOI:10.1109/ISCAS58744.2024.10557868
403.
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
402.
Driemeyer, B.; Mandry, H.; Wiens, D.-P.; Becker, J.; Ortmanns, M.
Optimisation of RO-PUF Design Parameters for Minimising the Effective Area per PUF Bit
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
May 2024
DOI:10.1109/ISCAS58744.2024.10558478
401.
Conrad, J.; Wilhelmstätter, S.; Asthana, R.; Belagiannis, V.; Ortmanns, M.
Too-Hot-to-Handle: Insights into Temperature and Noise Hyperparameters for Differentiable Neural-Architecture-Searches
6th IEEE International Conference on Artificial Intelligence Circuits and Systems (AICAS), Abu-Dhabi, UAE
April 2024
DOI:10.1109/AICAS59952.2024.10595971

Books

2025

10.
Buhmann, A.; Lanniel, A.; Hiller, T.; Sporer, M.; Reich, S.; Ortmanns, M.
Interface Circuits
Publisher: Ed. Elsevier
in Comprehensive Microsystems, 2nd ed., Y. B. Gianchandani, Volume 1, 2025, pp. 452–479 Edition
2025
DOI:10.1016/B978-0-323-95478-5.00040-6

2023

9.
Chan, C.-H.; Zhu, Y.; Qi, L.; Sin, S.-W.; Ortmanns, M.; Martins, R. P.
High-Performance Oversampling ADCs
Paulo da Silva Martins, R., Mak, PI. (eds) Analog and Mixed-Signal Circuits in Nanoscale CMOS. Analog Circuits and Signal Processing. Springer, Cham. Edition
January 2023
DOI:doi.org/10.1007/978-3-031-22231-3_5

2021

8.
Haas, M.; Ortmanns, M.
Neural Stimulation Circuits
Publisher: River Publishers
Selected Topics in Biomedical Circuits and Systems, Eds Minkyu Je and Myung Hoon Sunwoo Edition
February 2021
ISBN:9788770221481

2019

7.
Vogelmann, P.; Mokhtar, M. A.; Luo, Y.; Ortmanns, M.
Next-Generation ADCs, High-Performance Power Management, and Technology Considerations for Advanced Integrated Circuits: Advances in Analog Circuit Design 2019
Publisher: Springer
2019
ISBN:978-3030252663

2016

6.
Ortmanns, M.; Ritter, R.; Chi, J.
ΣΔ ADCs with Improved Interferer Robustness
Volume Wideband Continuous-time SD-ADCs, Automotive Electronics, and Power Management: Advances in Analog Circuit Design 2016
Publisher: Springer
2016
ISBN:978-3319416694

2014

5.
Brückner, T.; Ortmanns, M.
Automated Design of High-Speed Continuous-Time Sigma-Delta Modulators employing Compensation and Correction of Non-Idealities, in High-Performance AD and DA Converters, IC Design in Scaled Technologies, and Time-Domain Signal Processing
Publisher: Springer
2014

2007

4.
Ortmanns, M.; Buhmann, A.; Manoli, Y.
Interface Circuits in Comprehensive Microsystems
Publisher: Elsevier Pubs.
2007

2006

3.
Buhmann, A.; Keller, M.; Ortmanns, M.; Gerfers, F.; Manoli, Y.
Time-Continuous Delta-Sigma A/D Converters - From Theory to Practical Implementation
Publisher: in Advanced Signal Processing, Circuits, and Systems Design Techniques for Communications, (eds. Paliouras, V.; Stouraitis, Th.; Ioinovici, A.)
2006

2005

2.
Ortmanns, M.; Gerfers, F.
Continuous-Time Sigma-Delta A/D Conversion, Fundamentals, Error Correction and Robust Implementations
Publisher: Springer Pubs.
2005

2003

1.
Ortmanns, M.
Error Compensation in Continuous-Time Sigma-Delta A/D Converters
Publisher: PhD Thesis, Albert-Ludwigs-University Freiburg
2003

Patents

  1. A. Herkle, J. Becker, M. Ortmanns
    [DE] Verfahren und Vorrichtung zur Erzeugung einer digitalen Signatur
    DE102016204055A1, Patent record available from the German Patent
    2016

  2. R. Ritter, M. Schimper, W. Schelmbauer, M. Ortmanns
    Analog-to-digital converter, signal processor, and method for analog-to-digital conversion.
    US8760330, Patent record available from the US Patent Office
    2014

  3. A. Rocke, M. Ortmanns und N. Unger
    Device for controlling the electric charge on stimulation electrodes.
    EP1827591, Patent record available from the European Patent
    2007

  4. M. Ortmanns, Y. Manoli und F. Gerfers
    Controlled power source, in particular for a digital/analogue converter in continuous time sigma/delta modulators.
    EP1550222, Patent record available from the European Patent
    2005

  5. A. Rocke, M. Ortmanns und N. Unger
    Device for controlling the electric charge on stimulation electrodes.
    WO06063743, Patent record available from the World Intellectual Property Organization (WIPO)
    2006

  6. M. Ortmanns und Y. Manoli
    Method for the characterisation of and for the automatic correction of linear errors in analog/digital converters.
    WO05078936, Patent record available from the World Intellectual Property Organization (WIPO)
    2005

  7. M. Ortmanns, Y. Manoli und F. Gerfers
    Controlled power source, in particular for a digital/analogue converter in continuous time sigma/delta modulators.
    WO04034588, Patent record available from the World Intellectual Property Organization (WIPO)
    2004

  8. M. Ortmanns, Y. Manoli und F. Gerfers
    Controlled current source, in particular for digital/analogue converters in continuous-time sigma/delta modulators.
    US7151474, Patent record available from the US Patent Office
    2006

  9. M. Ortmanns, Y. Manoli und F. Gerfers
    Controlled power source, in particular for a digital/analogue converter in continuous time sigma delta modulators.
    US20060055580, Patent record available from the US Patent Office
    2006