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

Papers

2021

357.
Ungethüm, J.; Kauffman, J. G.; Ortmanns, M.
Digital Resolution Requirements in 0-X Mash Delta-Sigma-Modulators
2021 IEEE International Conference on Electronics Circuits and Systems (ICECS)
November 2021
356.
Ortmanns, M.
Wideband and Low-Power Delta-Sigma ADCs: State of the Art, Trends and Implementation Examples
IEEE 47th European Solid State Circuits Conference (ESSCIRC)
September 2021
DOI:10.1109/ESSCIRC53450.2021.9567861
355.
Lanniel, A.; Boeser, T.; Alpert, T.; Ortmanns, M.
Low-Noise Readout Circuit for an Automotive MEMS Accelerometer
IEEE Open Journal of the Solid-State Circuits Society, vol. 1, pp. 140-148
September 2021
DOI:10.1109/OJSSCS.2021.3116125
354.
Ungethüm, J.; Kauffman, J. G.; Ortmanns, M.
Minimizing Signal-Dependent Residue in CT Pipelined ADCs
2021 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS)
August 2021
353.
Reich, S.; Sporer, M.; Haas, M.; Becker, J.; Schüttler, M.; Ortmanns, M.
A High-Voltage Compliance, 32-Channel Digitally Interfaced Neuromodulation System on Chip
IEEE Journal of Solid-State Circuits, vol. 56, issue 8, pp. 2476-2487
August 2021
DOI:10.1109/JSSC.2021.3076510
352.
Wagner, J.; Miki, T.; Ortmanns, M.
Compensation of Finite GBW in CT Baddpass SDMs Based on Single-OpAmp Resonators with Positive-Feedback
IEEE 64th International Midwest Symposium on Circuits and Systems (MWSCAS)
August 2021
351.
Müelich, S.; Mandry, H.; Ortmanns, M.; Fischer, R.
A Multilevel Coding Scheme for Multi-Valued Physical Unclonable Functions
IEEE Transactions on Information Forensics and Security
June 2021
DOI:10.1109/TIFS.2021.3089883
350.
Reich, S.; Sporer, M.; Ortmanns, M.
A Chopped Neural Front-end featuring Input Impedance Boosting with suppressed offset-induced charge transfer
IEEE Transactions on Biomedical Circuits and Systems
May 2021
DOI:10.1109/TBCAS.2021.3080398
349.
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
348.
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
347.
Mandry, H.; Müelich, S.; Becker, J.; Fischer, R.; Ortmanns, M.
Using Polynomial Interpolation for Reproducing Multi-Valued Responses of Physical Unclonable Functions on FPGAs
IEEE International Symposium on Circuits and Systems (ISCAS)
May 2021
DOI:10.1109/ISCAS51556.2021.9401501
346.
Mokhtar, M. A.; Abdelaal, A.; Sporer, M.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
A 0.9-V Calibration-Free 97dB-SFDR 2-MS/s Continuous­Time Incremental Delta-Sigma ADC Utilizing Variable Bit-Width Quantizer in 28nm CMOS
IEEE Custom Integrated Circuits Conference (CICC), Texas, USA (Virtual)
April 2021
345.
Rajabzadeh, M.; Ungethüm, J.; Herkle, A.; Schilpp, C.; Becker, J.; Fauler, M.; Wittekindt, O.; Frick, M.; Ortmanns, M.
A PCB Based 24-Ch. MEA-EIS Allowing Fast Measurement of TEER
IEEE Sensor Journal
March 2021
DOI:10.1109/JSEN.2021.3067823
344.
Conrad, J.; Jiang, B.; Kässer, P.; Belagiannis, V.; Ortmanns, M.
Nonlinearity Modeling for Mixed-Signal Inference Accelerators in Training Frameworks
28th IEEE International Conference on Electronics, Circuits, and Systems (ICECS), pp. 1-4
2021
DOI:10.1109/ICECS53924.2021.9665503
343.
Luo, Y.; Ortmanns, M.
Input Referred Noise of VCO-Based Comparators
IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 68, no. 1, pp. 82-86
January 2021
DOI:10.1109/TCSII.2020.3008260

2020

342.
Wagner, J.; Vogelmann, P.; Ortmanns, M.
An Automated Design Environment for CT Incremental Sigma-Delta ADCs
27th IEEE International Conference on Electronics, Circuits and Systems (ICECS)
November 2020
341.
Herkle, A.; Mandry, H.; Becker, J.; Reich, S.; Sporer, M.; Ortmanns, M.
Extracting Weak PUFs from Differential Nonlinearity of Digital-to-Analog Converters
IEEE International Symposium on Circuits and Systems (ISCAS), Seville, Spain
October 2020
340.
Herkle, A.; Mandry, H.; Becker, J.; Ortmanns, M.
Live Demonstration: Generating FPGA Fingerprints utilizing Full-Chip Characterization with Ring-Oscillator PUFs
IEEE International Symposium on Circuits and Systems (ISCAS), Seville, Spain
October 2020
339.
Mokhtar, M. A.; Vogelmann, P.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
FIR DACs in CT Incremental Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
338.
Abdelaal, A.; Kauffman, J. G.; Mokhtar, M. A.; Ortmanns, M.
A Comparative Study of ISI Errors in Different DAC Structures for CT Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
337.
Reich, S.; Sporer, M.; Ortmanns, M.
A self-compensated, low-offset Voltage Buffer for Input Impedance Boosting in Chopped Neural Front-ends
IEEE International Symposium on Circuits and Systems (ISCAS), Seville, Spain
October 2020
336.
Herkle, A.; Rossak, P.; Mandry, H.; Becker, J.; Ortmanns, M.
Comparison of measurement and readout strategies for RO-PUFs on Xilinx Zynq-7000 SoC FPGAs
IEEE International Symposium on Circuits and Systems (ISCAS), Seville, Spain
October 2020
335.
Vogelmann, P.; Wagner, J.; Ortmanns, M.
A 14b, Twofold Time-Interleaved Incremental ΔΣ ADC Using Hardware Sharing
IEEE Transactions on Circuits and Systems I: Regular Papers
July 2020
DOI:10.1109/TCSI.2020.3011362
334.
Rajabzadeh, M.; Häberle, M.; Becker, J.; Ortmanns, M.
Comparison Study of DAC Realizations in Current Input CTΣΔ Modulators
IEEE Transactions on Circuits and Systems II: Express Briefs
July 2020
DOI:10.1109/TCSII.2020.3007964
333.
Conrad, J.; Vogelmann, P.; Mokhtar, M. A.; Ortmanns, M.
Design Approach for Ring Amplifiers
IEEE Transactions on Circuits and Systems I: Regular Papers
April 2020
DOI:10.1109/TCSI.2020.2986553

Books

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