Papers
2020
329.
A. Lanniel,
T. Boeser,
T. Alpert and
M. Ortmanns,
"Noise Analysis of Charge-Balanced Readout Circuits for MEMS Accelerometers",
IEEE Transactions on Circuits and Systems I: Regular Papers,
2020.
| DOI: | 10.1109/TCSI.2020.3034159 |
2019
328.
J. Wagner,
P. Vogelmann and
M. Ortmanns,
"On the Signal Filtering Property of CT Incremental Sigma-Delta ADCs",
IEEE Transactions on Circuits and Systems—II: Express Briefs,
Nov.
2019.
327.
M. Rajabzadeh,
J. Ungethüm,
A. Herkle,
C. Schilpp,
M. Fauler,
O. Wittekindt and
M. Ortmanns,
"A 24-Ch. Multi-Electrode Array Allowing Fast EIS to Determine Transepithelial Electrical Resistance",
2019 IEEE Biomedical Circuits and Systems Conference (BioCAS), Nara, Japan,
Oct.
2019.
326.
M. A. Mokhtar,
P. Vogelmann,
M. Haas and
M. Ortmanns,
"A 94.3 dB SFDR, 91.5 dB DR, 200 kS/s CT Incremental Delta-Sigma Modulator with Differentially Reset FIR Feedback",
IEEE Solid-State Circuits Letter, September 2019 - Presented on IEEE European Solid-State Circuits conference (ESSDERC/ESSCIRC), Krakow, Poland,
Sep.
2019.
325.
M. Rajabzadeh,
M. Häberle,
A. Jain and
M. Ortmanns,
"An Integrated Readout for Current Sensing Based on a Sigma Delta Modulator with Switched Capacitor Feedback",
IEEE European Solid-State Circuits conference (ESSDERC/ESSCIRC), Krakow, Poland,
Sep.
2019.
324.
A. Nikas,
S. Jambunathan,
L. Klein,
M. Völker and
M. Ortmanns,
"A Continuous-Time Delta-Sigma Modulator Using a Modified Instrumentation Amplifier and Current Reuse DAC for Neural Recording",
IEEE Journal of Solid-State Circuits PP(99):1-13,
Aug.
2019.
| DOI: | 10.1109/JSSC.2019.2931811 |
323.
M. Rajabzadeh,
M. Häberle and
M. Ortmanns,
"Comparison of Direct Digitization Current Sensing Circuits for EIS",
15th Conference on PhD Research in Microelectronics and Electronics (PRIME 2019), Lausanne, Switzerland,
Jul.
2019.
322.
M. Rajabzadeh,
J. Ungethüm,
H. Mandry,
C. Schilpp,
O. Wittekindt and
M. Ortmanns,
"An Evaluation Study of Various Excitation Signals for Electrical Impedance Spectroscopy",
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan,
May
2019.
321.
A. Jain,
A. Abdelaal and
M. Ortmanns,
"Effective Filtering of Requantization Error in Dual Quantized CTDSM using FIR DAC",
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan, pp. 1-5.,
May
2019.
320.
J. Chi,
H. Mandry and
M. Ortmanns,
"Finite Gain-Bandwidth of Q Enhancement in Bandpass CT ΣΔ Modulator and Compensation",
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan, pp. 1-5.,
May
2019.
319.
A. Herkle,
H. Mandry,
J. Becker and
M. Ortmanns,
"In-depth Analysis and Enhancements of RO-PUFs with a Partial Reconfiguration Framework on Xilinx Zynq-7000 SoC FPGAs",
IEEE International Symposium on Hardware Oriented Security and Trust (HOST), Tysons Corner, USA,
May
2019.
| DOI: | 10.18725/OPARU-14107 |
318.
M. A. Mokhtar,
P. Vogelmann,
J. Wagner and
M. Ortmanns,
"Incremental Sturdy-MASH Sigma-Delta Modulator with Reduced Sensitivity to DAC Mismatch",
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan,
May
2019.
317.
Y. Luo,
A. Jain,
J. Wagner and
M. Ortmanns,
"Input Referred Comparator Noise in SAR ADCs",
IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 66, no. 5, pp. 718-722,
May
2019.
| DOI: | 10.1109/TCSII.2019.2909429 |
316.
H. Mandry,
A. Herkle,
L. Kürzinger,
S. Müelich,
J. Becker,
R. Fischer and
M. Ortmanns,
"Modular PUF Coding Chain with High-Speed Reed-Muller Decoder",
IEEE International Symposium on Circuits and Systems (ISCAS), Sapporo, Japan,
May
2019.
315.
Y. Luo,
A. Jain and
M. Ortmanns,
"A Multi-bit Delta-Sigma DAC Architecture with Internal DAC Non-linearity Suppression",
Analogworkshop 2019, Universität Stuttgart,
Mar.
2019.
314.
L. Qi,
A. Jain,
D. Jiang,
S. -. Sin,
R. P. Martins and
M. Ortmanns,
"A 76.6dB-SNDR 50MHz-BW 29.2mW Noise-Coupling-Assisted CT Sturdy MASH ΔΣ Modulator with 1.5b/4b Quantizers in 28nm CMOS",
IEEE International Solid- State Circuits Conference - (ISSCC), San Francisco, USA,
Feb.
2019.
https://ieeexplore.ieee.org/document/8662529.
313.
P. Vogelmann,
J. Wagner,
M. Haas and
M. Ortmanns,
"A Dynamic Power Reduction Technique for Incremental ΔΣ Modulators",
IEEE Journal of Solid-State Circuits,
Jan.
2019.
312.
M. Häberle,
D. Djekic,
M. Rajabzadeh,
G. Fantner,
K. Lips,
M. Ortmanns and
J. Anders,
"Comparison of Different Precision Pseudo Resistor Realizations in the DC-Feedback of Capacitive Transimpedance Amplifiers",
IEEE International Conference on Electronics Circuits and Systems (ICECS 2019), Genova, Italy pp. 699-702,
2019.
| DOI: | 10.1109/ICECS46596.2019.8965196 |
311.
A. Lanniel,
T. Boeser,
L. Aichholz,
T. Alpert and
M. Ortmanns,
"Impact of Parasitics on the Settling Time of a Readout Circuit for High Performance MEMS Accelerometers",
IEEE International Symposium on Inertial Sensors and Systems (INERTIAL),
2019.
| DOI: | 10.1109/ISISS.2019.8739750 |
310.
A. Lanniel,
T. Boeser,
T. Alpert and
M. Ortmanns,
"Tackling SDM Feedback Coefficient Modulation in Area Optimized Frontend Readout Circuit for High Performance MEMS Accelerometers",
IEEE International Symposium on Inertial Sensors and Systems (INERTIAL),
2019.
| DOI: | 10.1109/ISISS.2019.8739683 |
2018
309.
L. Lv,
A. Jain,
X. Zhou,
J. Becker,
Q. Li and
M. Ortmanns,
"A 0.4-V Gm–C Proportional-Integrator-Based Continuous-Time Delta-Sigma Modulator With 50-kHz BW and 74.4-dB SNDR",
IEEE Journal of Solid-State Circuits, vol. 53, no. 11, pp. 3256-3267,
Nov.
2018.
308.
J. Wagner,
F. Vogel,
F. Kuhm and
M. Ortmanns,
"Automated Synthesis of Subsampling CT Bandpass Sigma-Delta Modulators with Non-Idealities",
2nd New Generation of Circuits & Systems Conference (NGCAS 2018), Valetta, Malta,
Nov.
2018.
307.
J. Wagner,
P. Vogelmann and
M. Ortmanns,
"On the Optimization of DT Incremental Sigma-Delta Modulators in Combination with CoI Reconstruction Filters",
2nd New Generation of Circuits & Systems Conference (NGCAS 2018), Valetta, Malta,
Nov.
2018.
306.
M. Haas and
M. Ortmanns,
"Efficient implementation and stability analysis of a HV-CMOS current/voltage mode stimulator",
IEEE/CAS-EMB Biomedical Circuits and Systems Conference (BioCAS) 2018, Cleveland, USA,
Oct.
2018.
305.
M. Häberle,
D. Djekic,
G. Fantner,
K. Lips,
M. Ortmanns and
J. Anders,
"An integrator-differentiator TIA using a multi-element pseudo-resistor in its DC servo loop for enhanced noise performance",
ESSCIRC 2018 - 44th IEEE European Solid State Circuits Conference, Dresden, Germany,
Sep.
2018.
https://ieeexplore.ieee.org/document/8494290.
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