Papers
2023
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 |
373.
J. Zhang,
S. -. Sin,
Y. Liu,
F. Ye,
G. Wang,
M. Ortmanns and
L. Qi,
"On the Synthesis of Continuous-Time Sturdy MASH Delta-Sigma Modulators",
IEEE Transactions on Circuits and Systems II: Express Briefs,
Oct.
2022.
| DOI: | 10.1109/TCSII.2022.3212059 |
372.
S. Reich,
P. Ammann,
M. Sporer and
M. Ortmanns,
"An Onchip Electrode Impedance Estimation achieving 1.2 dB 3σ-Accuracy with Minimum Hardware Overhead",
IEEE Biomedical Circuits and Systems Conference (BioCAS), Taipeh, Taiwan,
Oct.
2022.
| DOI: | 10.1109/BioCAS54905.2022.9948672 |
371.
B. Driemeyer,
H. Mandry,
D. -. Wiens,
J. Becker and
M. Ortmanns,
"PUF-Entropy Extraction of DAC Intersymbol-Interference using Continuous-Time Delta-Sigma ADCs",
IEEE International Conference on Electronics, Circuits and Systems (ICECS),
Oct.
2022.
| DOI: | 10.1109/ICECS202256217.2022.9971072 |
370.
S. Reich,
M. Sporer,
J. Becker,
S. B. Rieger,
M. Schüttler and
M. Ortmanns,
"A 32-ch Neuromodulator with redundant Voltage Monitors avoiding Blocking Capacitors",
IEEE ESSDERC/ESSCIRC 2022, Milan, Italy,
Sep.
2022.
369.
M. Häberle,
D. Djekic,
D. Krüger,
M. Rajabzadeh,
M. Ortmanns and
J. Anders,
"An Integrator-Differentiator Transimpedance Amplifier Using Tunable Linearized High-Value Multi-Element Pseudo-Resistors",
IEEE Transactions on Circuits and Systems--I: Regular Papers,
Aug.
2022.
| DOI: | 10.1109/TCSI.2022.3174174 |
368.
M. Sporer,
S. Reich,
J. G. Kauffman and
M. Ortmanns,
"A Direct Digitizing Chopped Neural Recorder Using a Body-Induced Offset Based DC Servo Loop",
IEEE Transactions on Biomedical Circuits and Systems,
Jun.
2022.
| DOI: | 10.1109/TBCAS.2022.3177241 |
367.
S. Reich,
G. Kunze,
M. Sporer and
M. Ortmanns,
"Analysis of Chopper Ripple Reduction by Delayed Sampling",
SMACD / PRIME 2022; International Conference on SMACD and 17th International Conference on PRIME, pp. 1-4,
Jun.
2022.
366.
S. Reich,
D. Fritschi,
M. Sporer and
M. Ortmanns,
"Artifact-Recovery in Neuromodulators using Tunable High-Pass Corners",
20th IEEE International NEWCAS Conference, Québec, Canada,
Jun.
2022.
365.
J. Wagner,
M. A. Mokhtar and
M. Ortmanns,
"Automated Design of Sigma-Delta Modulators with FIR Feedback",
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, USA,
Jun.
2022.
364.
S. Reich,
D. Fritschi,
M. Sporer and
M. Ortmanns,
"An Experimental Reliability Study of Pseudo-Resistors in Biomedical Applications",
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, TX, USA,
May
2022.
363.
M. Pietzko,
J. Ungethüm,
J. G. Kauffman,
Q. Li and
M. Ortmanns,
"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.
B. Driemeyer,
J. Spiess,
J. G. Kauffman and
M. Ortmanns,
"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.
J. Ungethüm,
M. Pietzko,
J. G. Kauffman,
Q. Li and
M. Ortmanns,
"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 |
360.
L. Qi,
Y. Liu,
S. -. Sin,
X. Xing,
G. Wang,
M. Ortmanns and
R. P. Martins,
"Wideband Continuous-time MASH Delta-Sigma Modulators: A Tutorial Review",
IEEE Transactions on Circuits and Systems II: Express Briefs,
Mar.
2022.
| DOI: | 10.1109/TCSII.2022.3163766 |
2021
359.
M. A. Mokhtar,
M. Merkle,
J. G. Kauffman and
M. Ortmanns,
"A Comparative Study of Noise Behavior in Single-Opamp Resonators in Delta-Sigma Modulators",
28th IEEE International Conference on Electronics, Circuits, and Systems (ICECS), Dubai, UAE,
Nov.
2021.
358.
J. Ungethüm,
J. G. Kauffman and
M. Ortmanns,
"Digital Resolution Requirements in 0-X Mash Delta-Sigma-Modulators",
2021 IEEE International Conference on Electronics Circuits and Systems (ICECS),
Nov.
2021.
357.
A. Lanniel,
T. Boeser,
T. Alpert and
M. Ortmanns,
"Low-Noise Readout Circuit for an Automotive MEMS Accelerometer",
IEEE Open Journal of the Solid-State Circuits Society, vol. 1, pp. 140-148,
Sep.
2021.
| DOI: | 10.1109/OJSSCS.2021.3116125 |
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
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
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
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
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
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
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
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
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
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
Error Compensation in Continuous-Time Sigma-Delta A/D Converters
Publisher: PhD Thesis, Albert-Ludwigs-University Freiburg
2003
Patents
- A. Herkle, J. Becker, M. Ortmanns
[DE] Verfahren und Vorrichtung zur Erzeugung einer digitalen Signatur
DE102016204055A1, Patent record available from the German Patent
2016 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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