Papers
2023
389.
M. A. Mokhtar,
O. Ismail,
P. Vogelmann,
J. G. Kauffman and
M. Ortmanns,
"A 40 kS/sCalibration-Free Incremental 鈻澄� 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: |
388.
J. Ungeth眉m,
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: |
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: |
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: |
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: |
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: |
383.
M. Pietzko,
J. Spiess,
J. Ungeth眉m,
J. G. Kauffman,
Q. Li and
M. Ortmanns,
"Bitwise ELD Compensation under Integrator Nonidealities in 螖危 Modulators",
21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, United Kingdom,
Jun.
2023.
| DOI: |
382.
M. Sporer,
N. Graber,
S. Reich,
C. Gueli,
J. Becker,
T. Stieglitz and
M. Ortmanns,
"NeuroBus 鈥� Architecture and Communication Bus for an Ultra-Flexible Neural Interface",
IEEE International Symposium on Circuits and Systems (ISCAS), Monterey, CA, USA,
May
2023.
| DOI: |
381.
M. Pietzko,
J. Ungeth眉m,
J. G. Kauffman and
M. Ortmanns,
"Delay Error Shaping in 螖危 Modulators Using Time-Interleaved High Resolution Quantizers",
IEEE Transactions on Circuits and Systems I: Regular Papers,
May
2023.
| DOI: |
380.
P. K盲sser,
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: |
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: |
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: |
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: |
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: |
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: |
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: |
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: |
372.
S. Reich,
P. Ammann,
M. Sporer and
M. Ortmanns,
"An Onchip Electrode Impedance Estimation achieving 1.2 dB 3蟽-Accuracy with Minimum Hardware Overhead",
IEEE Biomedical Circuits and Systems Conference (BioCAS), Taipeh, Taiwan,
Oct.
2022.
| DOI: |
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: |
370.
S. Reich,
M. Sporer,
J. Becker,
S. B. Rieger,
M. Sch眉ttler and
M. Ortmanns,
"A 32-ch Neuromodulator with redundant Voltage Monitors avoiding Blocking Capacitors",
IEEE ESSDERC/ESSCIRC 2022, Milan, Italy,
Sep.
2022.
369.
M. H盲berle,
D. Djekic,
D. Kr眉ger,
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: |
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: |
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, Qu茅bec, 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.
Books
2026
11.
Ortmanns,
M.;
K盲sser,
P.;
Wagner,
J.
Incremental Delta-Sigma ADCs
Publisher: Springer Cham
March 2026
Incremental Delta-Sigma ADCs
Publisher: Springer Cham
March 2026
| DOI: | |
| 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鈥�479 Edition
2025
Interface Circuits
Publisher: Ed. Elsevier
in Comprehensive Microsystems, 2nd ed., Y. B. Gianchandani, Volume 1, 2025, pp. 452鈥�479 Edition
2025
| DOI: |
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
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: | |
| 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
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.
危螖 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
危螖 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.
Br眉ckner,
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
, 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