Institute of Microelectronics

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

Papers  Books  Patents 

Papers

2024

398.
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.
397.
R. Asthana, J. Conrad, Y. Dawoud, M. Ortmanns and V. Belagiannis, "Multi-conditioned Graph Diffusion for Neural Architecture Search", Transactions on Machine Learning Research, Mar. 2024. https://openreview.net/forum?id=5VotySkajV.
Weblink:https://openreview.net/forum?id=5VotySkajV
396.
M. Sporer, I. -. Vasilaș, A. Adžemović, N. Graber, S. Reich, C. Gueli, M. Eickenscheidt, I. Diester, T. Stieglitz and M. Ortmanns, "NeuroBus - Architecture for an Ultra-Flexible Neural Interface", IEEE Transactions on Biomedical Circuits and Systems ( Early Access ), Pages: 1 - 16, Jan. 2024.
DOI:10.1109/TBCAS.2024.3354785
395.
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

394.
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, Dec. 2023.
DOI:10.1109/ICECS58634.2023.10382904
393.
B. Driemeyer, P. Kässer, H. Mandry, D. -. Wiens and M. Ortmanns, "A Feasibility Study on a Switched-Capacitor Based PUF in 28 nm Technology", 30th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Istanbul, Turkiye, Dec. 2023.
DOI:10.1109/ICECS58634.2023.10382899
392.
B. Driemeyer, P. Kässer and M. Ortmanns, "Optimum Position of Digital DAC Error Correction relative to the Decimation Filter in ΔΣ ADCs", 30th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Istanbul, Turkiye, Dec. 2023.
DOI:10.1109/ICECS58634.2023.10382885
391.
D. -. Wiens, M. Sporer, B. Driemeyer and M. Ortmanns, "A Mixed-Signal Integrator-Differentiator-TIA", IEEE Transactions on Circuits and Systems--II: Express Briefs, Sep. 2023.
DOI:10.1109/TCSII.2023.3318725
390.
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
389.
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
388.
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
387.
M. Jang, X. Tang, Y. Lim, J. G. Kauffman, L. Sun, M. Ortmanns and Y. Chae, "Design Techniques for Energy Efficient Analog-to-Digital Converters", IEEE Open Journal of the Solid-State Circuits Society, Sep. 2023.
DOI:10.1109/OJSSCS.2023.3311418
386.
Y. Chae, C. M. Lopez, K. A. A. Makinwa, M. Ortmanns and W. Sansen, "A Glimpse of the History of Analog ICs: A Tale of Amplifiers, Data Converters, and Sensor Interfaces", IEEE Solid-State Circuits Magazine, Aug. 2023.
DOI:10.1109/MSSC.2023.3282557
385.
S. Reich, M. Sporer and M. Ortmanns, "A Flexible Power Management System-On-Chip for Implantable Brain-Machine-Interfaces", 21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, Scotland, Jun. 2023.
DOI:10.1109/NEWCAS57931.2023.10198129
384.
S. Reich, M. Sporer and M. Ortmanns, "A Time-Domain Charge-Balancing Method for Neuromodulators", 21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, Scotland, Jun. 2023.
DOI:10.1109/NEWCAS57931.2023.10198109
383.
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
382.
M. Sporer, N. Graber, S. Reich, C. Gueli, J. Becker, T. Stieglitz and M. Ortmanns, "NeuroBus – Architecture and Communication Bus for an Ultra-Flexible Neural Interface", IEEE International Symposium on Circuits and Systems (ISCAS), Monterey, CA, USA, May 2023.
DOI:10.1109/ISCAS46773.2023.10181816
381.
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
380.
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, May 2023.
DOI:10.1109/ISCAS46773.2023.10182215
379.
M. Dalla Longa, F. Conzatti, J. L. Ceballos and M. Ortmanns, "On the Intrinsic Linearity Limitations of Single-Bit Delta Sigma Modulators", IEEE International Symposium on Circuits and Systems (ISCAS), May 2023.
DOI:10.1109/ISCAS46773.2023.10181538
378.
B. Lippmann, J. Hatsch, S. Seidl, D. Houdeau, N. P. Subrahmanyam, D. Schneider, M. Safieh, A. Passarelli, A. Maftun, M. Brunner, T. Music, M. Pehl, T. Siddiqui, R. Brederlow, U. Schlichtmann, B. Driemeyer, M. Ortmanns, R. Hesselbarth and M. Hiller, "VE-FIDES: Designing Trustworthy Supply Chains Using Innovative Fingerprinting Implementations", Design, Automation & Test in Europe Conference & Exhibition (DATE), Apr. 2023.
DOI:10.23919/DATE56975.2023.10137026
377.
M. Dalla Longa, F. Conzatti, T. Hofmann, J. G. Kauffman and M. Ortmanns, "An Intrinsically Linear 13-Level Capacitive DAC for Delta Sigma Modulators", IEEE Transactions on Circuits and Systems II: Express Briefs, Apr. 2023.
DOI:doi.org/10.1109/TCSII.2022.3224878
376.
S. Reich, D. Fritschi, M. Sporer and M. Ortmanns, "In Vitro Study of Artifact-Recovery Using a 32-Channel Neuromodulator Platform", IEEE Transactions on Circuits and Systems I: Regular Papers (Early Access), Mar. 2023.
DOI:10.1109/TCSI.2023.3255549

2022

375.
M. A. Mokhtar, A. Abdelaal, M. Sporer, J. Becker, J. G. Kauffman and M. Ortmanns, "A 0.9-V DAC-Calibration-Free Continuous-Time Incremental Delta-Sigma Modulator Achieving 97-dB SFDR at 2 MS/s in 28-nm CMOS", IEEE Journal of Solid-State Circuits, Volume: 57, Issue: 11, Nov. 2022.
DOI:10.1109/JSSC.2022.3160325
374.
M. Sporer, S. Reich, H. Mandry, J. Becker and M. Ortmanns, "A Wireless Headstage Prototype Based on a Neurorecorder IC", IEEE Biomedical Circuits and Systems Conference (BioCAS), Taipei, Taiwan, Oct. 2022.
DOI:10.1109/BioCAS54905.2022.9948554

Books

2026

11.
Ortmanns, M.; Kässer, P.; Wagner, J.
Incremental Delta-Sigma ADCs
Publisher: Springer Cham
March 2026
DOI:10.1007/978-3-032-09468-1
ISBN:978-3-032-09467-4

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
Publisher: Springer, Cham
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:10.1007/978-3-031-22231-3_5
ISBN:978-3-031-22230-6

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