Papers
2013
179.
T. Brückner,
M. Kiebler,
M. Lorenz,
C. Zorn,
W. Mathis and
M. Ortmanns,
"Calculating Transfer Functions of CT Sigma-Delta Modulators with Arbitrary DAC Waveforms",
IEEE International Symposium on Circuits and Systems (ISCAS), Beijing, China,
May
2013.
178.
M. Lorenz,
T. Brückner,
R. Ritter and
M. Ortmanns,
"Concurrent Estimation of Amplifier Nonidealities and Excess Loop Delay in Continuous-Time Sigma-Delta Modulators",
IEEE International Symposium on Circuits and Systems (ISCAS), Beijing, China,
May
2013.
177.
R. Ritter,
J. G. Kauffman,
M. Lorenz and
M. Ortmanns,
"Integrator Swing Reduction in Feedback Compensated Sigma Delta Modulators",
IEEE International Symposium on Circuits and Systems (ISCAS), Beijing, China,
May
2013.
176.
J. G. Kauffman,
R. Ritter,
C. Chu,
J. Becker and
M. Ortmanns,
"Low Power Quantizer Design in CT Delta Sigma Modulators",
IEEE International Symposium on Circuits and Systems (ISCAS), Beijing, China,
May
2013.
175.
B. Schlecker,
M. Ortmanns,
G. Fantner and
J. Anders,
"PLL-based high-speed demodulation of FM signals for real-time AFM applications",
IEEE International Symposium on Circuits and Systems (ISCAS), Beijing, China,
May
2013.
174.
T. Liu,
J. Anders and
M. Ortmanns,
"System Level Model for Transcutaneous Optical Telemetric Link",
IEEE International Symposium on Circuits and Systems (ISCAS), Beijing, China,
May
2013.
173.
T. Liu,
H. Xu and
M. Ortmanns,
"Light Tissue Interaction for transcutaneous Optical Telemetric Link",
Analog 2013, Aachen, Germany,
Mar.
2013.
172.
B. Schlecker,
J. Anders and
M. Ortmanns,
"PLL-basierte Demodulation von FM Signalen für frequenzmodulierte Hochgeschwindigkeitsrasterkraftmikroskopie",
15. Workshop Analogschaltungen 2013, Reutlingen, Germany,
Feb.
2013.
2012
171.
C. Bulach,
U. Bihr and
M. Ortmanns,
"Evaluating the Influence of the Bit Error Rate on the
Information of Neural Spike Signals",
19th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Seville, Spain,
Dec.
2012.
170.
T. Brückner,
M. Kiebler,
C. Zorn,
W. Mathis and
M. Ortmanns,
"Discrete-Time Simulation of Arbitrary Digital/Analog Converter Waveforms in Continuous-Time Sigma-Delta Modulators
",
19th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Seville, Spain,
Dec.
2012.
169.
M. Lorenz,
M. Maurer,
Y. Manoli and
M. Ortmanns,
"Joint Estimation of Filter Nonidealities in Continuous-Time Sigma-Delta Modulators by using an Unscented Kalman Filter",
19th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Seville, Spain,
Dec.
2012.
168.
C. Zorn,
T. Brückner,
M. Ortmanns and
W. Mathis,
"Performance tuning of multi-bit continuous time ΣΔ-modulators using a
switched system model",
19th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Seville, Spain,
Dec.
2012.
167.
C. Chu,
J. G. Kauffman and
M. Ortmanns,
"A 12-bit continuous-time third Order ΔΣ Modulator with 85dBFS SFDR in a 15MHz BW",
Kleinheubacher Tagung 2012, Miltenberg, Germany,
Sep.
2012.
166.
A. Zahabi,
M. Anis and
M. Ortmanns,
"A 9.6 GS/s 112 mW 58 dB DR 150 MHz Bandwidth RF Bandpass Transmission Line SD Modulator",
European Solid-State Circuit Conf. (ESSCIRC), Bordeaux, France,
Sep.
2012.
165.
U. Bihr and
M. Ortmanns,
"A Front-End Circuit for Neural Recording Applications with Spectral Separation of LFP and Action Potentials Consuming 21 μW per Channel",
46. DGBMT Jahrestagung (BMT 2012), Jena, Germany,
Sep.
2012.
164.
H. Xu,
E. Noorsal,
K. Sooksood,
J. Becker and
M. Ortmanns,
"A Multichannel Neurostimulator with Transcutaneous Closed-Loop Power Control and Self-Adaptive Supply",
IEEE European Solid-State Circuits Conference (ESSCIRC), Bordeaux, France,
Sep.
2012.
163.
B. Schlecker,
M. Ortmanns and
J. Anders,
"Hochgeschwindigkeitsdetektoren für frequenzmodulierte Rasterkraftmikroskopie",
Kleinheubacher Tagung, Miltenberg, Germany,
Sep.
2012.
162.
J. Handwerker,
M. Ortmanns and
J. Anders,
"Multiplexingstrategien für vollintegrierte CMOS NMR Empänger für die NMR Mikroskopie",
Kleinheubacher Tagung, Miltenberg, Germany,
Sep.
2012.
161.
A. Zahabi,
M. Anis and
M. Ortmanns,
"A Power/Area-Starved Complementary-Cross-Coupled Filter for Integrated Transmission Line SD Modulators",
IEEE Midwest Symposium on Circuits and Systems (MWSCAS 2012), Boise, Idaho, USA,
Aug.
2012.
160.
E. Noorsal,
K. Sooksood,
U. Bihr,
J. Becker and
M. Ortmanns,
"Distributed Clock Gating for Power Reduction of a Programmable Waveform Generator for Neural Stimulation",
34nd Annual Int. Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2012), San Diego, USA,
Aug.
2012.
159.
C. Bulach,
U. Bihr and
M. Ortmanns,
"Evaluation Study of Compressed Sensing for Neural Spike Recordings",
34nd Annual Int. Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2012), San Diego, USA,
Aug.
2012.
158.
T. Brückner,
M. Lorenz,
C. Zorn,
J. Becker,
W. Mathis and
M. Ortmanns,
"Hardware-Accelerated Simulation Environment for CT Sigma–Delta Modulators Using an FPGA",
Transactions on Circuits and Systems II, Vol. 59, no.8, pp. 471-475,
Aug.
2012.
157.
A. Zahabi,
M. Anis and
M. Ortmanns,
"Near Field Inductive Coupled Tuning Technique For RF Bandpass SD Modulators",
IEEE Midwest Symposium on Circuits and Systems (MWSCAS 2012), Boise, Idaho, USA,
Aug.
2012.
156.
T. Liu,
U. Bihr,
M. Anis and
M. Ortmanns,
"Optical Transcutaneous Link for Low Power, High Data Rate Telemetry",
34nd Annual Int. Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2012), San Diego, USA,
Aug.
2012.
155.
J. G. Kauffman,
T. Brückner and
M. Ortmanns,
"PVT Robust Design of Wideband CT Delta Sigma Modulators Including Finite GBW Compensation",
The 55th IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), Boise, Idaho, USA,
Aug.
2012.
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