Institute of Microelectronics

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

Papers  Books  Patents 

Papers

2023

385.
Reich, S.; Sporer, M.; Ortmanns, M.
A Flexible Power Management System-On-Chip for Implantable Brain-Machine-Interfaces
21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, Scotland
June 2023
DOI:10.1109/NEWCAS57931.2023.10198129
384.
Reich, S.; Sporer, M.; Ortmanns, M.
A Time-Domain Charge-Balancing Method for Neuromodulators
21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, Scotland
June 2023
DOI:10.1109/NEWCAS57931.2023.10198109
383.
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
382.
Sporer, M.; Graber, N.; Reich, S.; Gueli, C.; Becker, J.; Stieglitz, T.; Ortmanns, M.
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.
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
380.
Kässer, P.; Ismail, O.; Rudorf, C.; Wagner, J.; Ortmanns, M.
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.
Dalla Longa, M.; Conzatti, F.; Ceballos, J.L.; Ortmanns, M.
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.
Lippmann, B.; Hatsch, J.; Seidl, S.; Houdeau, D.; Subrahmanyam, N. P.; Schneider, D.; Safieh, M.; Passarelli, A.; Maftun, A.; Brunner, M.; Music, T.; Pehl, M.; Siddiqui, T.; Brederlow, R.; Schlichtmann, U.; Driemeyer, B.; Ortmanns, M.; Hesselbarth, R.; Hiller, M.
VE-FIDES: Designing Trustworthy Supply Chains Using Innovative Fingerprinting Implementations
Design, Automation & Test in Europe Conference & Exhibition (DATE)
April 2023
DOI:10.23919/DATE56975.2023.10137026
377.
Dalla Longa, M.; Conzatti, F.; Hofmann, T.; Kauffman, J. G.; Ortmanns, M.
An Intrinsically Linear 13-Level Capacitive DAC for Delta Sigma Modulators
IEEE Transactions on Circuits and Systems II: Express Briefs
April 2023
DOI:doi.org/10.1109/TCSII.2022.3224878
376.
Reich, S.; Fritschi, D.; Sporer, M.; Ortmanns, M.
In Vitro Study of Artifact-Recovery Using a 32-Channel Neuromodulator Platform
IEEE Transactions on Circuits and Systems I: Regular Papers (Early Access)
March 2023
DOI:10.1109/TCSI.2023.3255549

2022

375.
Mokhtar, M. A.; Abdelaal, A.; Sporer, M.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
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
November 2022
DOI:10.1109/JSSC.2022.3160325
374.
Sporer, M.; Reich, S.; Mandry, H.; Becker, J.; Ortmanns, M.
A Wireless Headstage Prototype Based on a Neurorecorder IC
IEEE Biomedical Circuits and Systems Conference (BioCAS), Taipei, Taiwan
October 2022
DOI:10.1109/BioCAS54905.2022.9948554
373.
Zhang, J.; Sin, S.-W.; Liu, Y.; Ye, F.; Wang, G.; Ortmanns, M.; Qi, L.
On the Synthesis of Continuous-Time Sturdy MASH Delta-Sigma Modulators
IEEE Transactions on Circuits and Systems II: Express Briefs
October 2022
DOI:10.1109/TCSII.2022.3212059
372.
Reich, S.; Ammann, P.; Sporer, M.; Ortmanns, M.
An Onchip Electrode Impedance Estimation achieving 1.2 dB 3σ-Accuracy with Minimum Hardware Overhead
IEEE Biomedical Circuits and Systems Conference (BioCAS), Taipeh, Taiwan
October 2022
DOI:10.1109/BioCAS54905.2022.9948672
371.
Driemeyer, B.; Mandry, H.; Wiens, D.-P.; Becker, J.; Ortmanns, M.
PUF-Entropy Extraction of DAC Intersymbol-Interference using Continuous-Time Delta-Sigma ADCs
IEEE International Conference on Electronics, Circuits and Systems (ICECS)
October 2022
DOI:10.1109/ICECS202256217.2022.9971072
370.
Reich, S.; Sporer, M.; Becker, J.; Rieger, S. B.; Schüttler, M.; Ortmanns, M.
A 32-ch Neuromodulator with redundant Voltage Monitors avoiding Blocking Capacitors
IEEE ESSDERC/ESSCIRC 2022, Milan, Italy
September 2022
369.
Häberle, M.; Djekic, D.; Krüger, D.; Rajabzadeh, M.; Ortmanns, M.; Anders, J.
An Integrator-Differentiator Transimpedance Amplifier Using Tunable Linearized High-Value Multi-Element Pseudo-Resistors
IEEE Transactions on Circuits and Systems--I: Regular Papers
August 2022
DOI:10.1109/TCSI.2022.3174174
368.
Sporer, M.; Reich, S.; Kauffman, J. G.; Ortmanns, M.
A Direct Digitizing Chopped Neural Recorder Using a Body-Induced Offset Based DC Servo Loop
IEEE Transactions on Biomedical Circuits and Systems
June 2022
DOI:10.1109/TBCAS.2022.3177241
367.
Reich, S.; Kunze, G.; Sporer, M.; Ortmanns, M.
Analysis of Chopper Ripple Reduction by Delayed Sampling
SMACD / PRIME 2022; International Conference on SMACD and 17th International Conference on PRIME, pp. 1-4
June 2022
366.
Reich, S.; Fritschi, D.; Sporer, M.; Ortmanns, M.
Artifact-Recovery in Neuromodulators using Tunable High-Pass Corners
20th IEEE International NEWCAS Conference, Québec, Canada
June 2022
365.
Wagner, J.; Mokhtar, M. A.; Ortmanns, M.
Automated Design of Sigma-Delta Modulators with FIR Feedback
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, USA
June 2022
364.
Reich, S.; Fritschi, D.; Sporer, M.; Ortmanns, M.
An Experimental Reliability Study of Pseudo-Resistors in Biomedical Applications
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, TX, USA
May 2022
363.
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
362.
Driemeyer, B.; Spiess, J.; Kauffman, J. G.; Ortmanns, M.
Complexity Reduced LUT-Based DAC Correction in Continuous-Time Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS)
May 2022
DOI:10.1109/ISCAS48785.2022.9937300
361.
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

Books

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