Papers
2008
79.
J. Becker,
F. Henrici,
S. Trendelenburg,
M. Ortmanns and
Y. Manoli,
"A Field-Programmable Analog Array of 55 Digitally Tunable OTAs in a Hexagonal Lattice",
IEEE Journal of Solid-State Circuits,
vol. 43,
no. 12,
pp. 2759 - 2768,
Dec.
2008.
78.
D. Maurath,
F. Michel,
M. Ortmanns and
Y. Manoli,
"A 0.5V Rail-to-Rail 1.5 µW CMOS Amplifier for Micro-Energy Harvesting Applications",
IEEE Midwest Symposium on Circuits and Systems (MWSCAS), Knoxville, USA,
2008.
77.
T. Hehn,
C. Peters,
F. Hagedorn,
M. Ortmanns and
Y. Manoli,
"A CMOS Integrated Interface for Piezoelectric Generators",
Proc. PowerMEMS 2008+ microEMS2008, November 9-12,457-460, Sendai, Japan,
2008.
76.
C. Peters,
D. Spreemann,
M. Ortmanns and
Y. Manoli,
"A CMOS integrated voltage and power efficient AC/DC converter for energy harvesting applications",
Journal of Micromechanics Microengineering, JMM, 18 104005,
2008.
75.
M. Keller,
A. Buhmann,
M. Ortmanns and
Y. Manoli,
"A Comparative Study on Excess Loop Delay Compensation Techniques for Continuous-Time Sigma-Delta Modulators",
IEEE Trans. on Circuits and Systems I,
2008.
74.
J. Becker,
F. Henrici,
S. Trendelenburg,
M. Ortmanns and
Y. Manoli,
"A continuous-time hexagonal field programmable analog array in 0.13µm CMOS with 186 MHz GBW",
IEEE Int. Conf. on Solid State Circuits (ISSCC), San Francisco, USA,
2008.
73.
J. Becker,
F. Henrici,
S. Trendelenburg,
M. Ortmanns and
Y. Manoli,
"A Field Programmable Analog Array (FPAA) for reconfigurable instantiation of continuous-time filter",
Presentation at CDNlive! EMEA Student Design Contest,
2008.
72.
F. Henrici,
J. Becker,
M. Ortmanns and
Y. Manoli,
"A Floating-Gate Field Programmable Analog Array in 0.13 µm CMOS with 200 MHz GBW",
IEEE Int. Conf. on Solid State Circuits (ISSCC), Student Forum, San Francisco, USA,
2008.
71.
J. Becker,
F. Henrici,
S. Trendelenburg,
M. Ortmanns and
Y. Manoli,
"A Hexagonal Field Progammable Analog Array Consisting of 55 Tunable OTAs with 186 MHz GBW",
IEEE Int. Symp. on Circuits and Systems (ISCAS), Seattle, USA,
2008.
70.
J. Anders,
W. Mathis and
M. Ortmanns,
"A new optimization approach for the automatic design of Sigma Delta-modulators",
Proceedings of 2008 IEEE International Symposium on Circuits and Systems, Vols 1-10, p. 1432-1435,
2008.
69.
J. Anders,
W. Mathis and
M. Ortmanns,
"A New Optimization Approach for the Automatic Design of Sigma-Delta-Modulators",
IEEE Int. Symp. on Circuits and Systems (ISCAS), Seattle, USA,
2008.
68.
F. Henrici,
J. Becker,
M. Ortmanns and
Y. Manoli,
"A Switchable Folded-Cascode OTA without Transmission Gates in the Signal Path",
Norchip Conference, Tallin,
2008.
67.
K. Sooksood,
T. Stieglitz and
M. Ortmanns,
"An Experimental Study on Passive Charge Balancing",
13th Annual International FES Society Conference 2008, Freiburg, Germany,
2008.
66.
K. Sooksood,
T. Stieglitz and
M. Ortmanns,
"An Experimental Study on Passive Charge Balancing",
Kleinheubacher Tagung 2008, Miltenberg, Germany,
2008.
65.
M. Keller,
A. Buhmann,
M. Ortmanns and
Y. Manoli,
"Analysis of Digital Gain Error Compensation in Continuous-Time Cascaded Sigma-Delta Modulators",
IEEE Int. Symp. on Circuits and Systems (ISCAS), Seattle, USA,
2008.
64.
C. Peters,
M. Ortmanns and
Y. Manoli,
"CMOS Integrated Active Rectifier with Temperature Independent Efficiency",
Proc. of IEEE NORChip, Tallinn, Estonia,
2008.
63.
M. Afifi,
M. Ortmanns and
Y. Manoli,
"Design Study of a Tunable Bandpass Continuous Time Sigma Delta Modulator for FM Digital Receiver",
IEEE Mixed Design of Integrated Circuits and Systems International Conference 2008 (MIXDES), pp. 219 - 224, Poznan, Poland,
2008.
62.
C. Peters,
F. Henrici,
M. Ortmanns and
Y. Manoli,
"Fully CMOS Integrated Active Rectifier Without Voltage Drop",
IEEE Midwest Symposium on Circuits and Systems (MWSCAS), Knoxville, USA,
2008.
61.
D. Maurath,
F. Michel,
M. Ortmanns and
Y. Manoli,
"High Efficiency, Low-Voltage and Self-Adjusting Charge Pump with Enhanced Impedance Matching",
IEEE Midwest Symposium on Circuits and Systems (MWSCAS), Knoxville, USA,
2008.
60.
C. Peters,
F. Henrici,
M. Ortmanns and
Y. Manoli,
"High-Bandwidth Floating Gate CMOS Rectifiers with Reduced Voltage Drop",
IEEE Int. Symp. on Circuits and Systems (ISCAS), Seattle, USA,
2008.
59.
A. Shahein,
M. Becker,
N. Lotze,
M. Ortmanns and
Y. Manoli,
"Optimized Scheme for Power-of-Two Coefficient Approximation for Low Power Decimation Filters in Sigma Delta ADCs",
IEEE Midwest Symposium on Circuits and Systems (MWSCAS), Knoxville, USA,
2008.
58.
F. Henrici,
C. Peters,
J. Becker,
M. Ortmanns and
Y. Manoli,
"Reliability Study of Single-Poly Floating Gates in 0.13 µm CMOS for use in Field Programmable Analog Arrays",
IEEE Midwest Symposium on Circuits and Systems (MWSCAS), Knoxville, USA,
2008.
57.
N. Lotze,
M. Ortmanns and
Y. Manoli,
"Variability of flip-flop timing at sub-threshold voltages",
Proc. IEEE International Symposium on Low-Power Electronic Devices 2008 (ISLPED), Bangalore, India,
2008.
2007
56.
M. Ortmanns,
A. Rocke,
M. Gehrke and
H. -. Tiedtke,
" A 232 Channel Epiretinal Stimulator ASIC for a Vision Prosthesis",
IEEE Journal of Solid State Circuits, Vol.42, No.12, pp. 2946-2959,
2007.
55.
M. Ortmanns,
N. Unger,
A. Rocke,
S. Rackow,
M. Gehrke and
H. -. Tiedtke,
" A 232 channel visual prosthesis ASIC with production compliant safety and testability",
IEEE Int. Conf. on Solid State Circuits (ISSCC), San Francisco, USA,
2007.
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