Institute of Microelectronics

Publications - Prof. Dr.-Ing. M. Ortmanns

Papers  Books  Patents 

Papers

2004

29.
M. Ortmanns, F. Gerfers and Y. Manoli, " A New Technique for Automatic Error Correction in Sigma-Delta Modulators", IEEE Int. Symp. on Circuits and Systems (ISCAS), Kobe, Japan, 2004.
28.
M. Ortmanns, C. Peters, Y. Manoli, R. Schmelzeisen and R. Gutwald, " A Novel Method for in-vivo Stress Measurement in Osteosynthesis", Biomedizinische Technik BMT, Ilmenau, Germany, 2004.
27.
M. Ortmanns, C. Peters, Y. Manoli, R. Schmelzeisen and R. Gutwald, "A Pressure Sensor based in-vivo Stress Measurement in Osteosynthesis", Eurosensors XVIII, Rom, Italy, 2004.
26.
F. Gerfers, M. Ortmanns and Y. Manoli, "Design issues and performance limitations of a clock jitter insensitive multibit DAC architecture for high-performance low-power CT sigma-delta modulators", IEEE Symposium on Circuits and Systems, Vancouver, Canada, 2004.
25.
M. Becker, N. Lotze, J. Becker, M. Ortmanns and Y. Manoli, "Implementation of a Power Optimized Decimator for Cascaded Sigma-Delta A/D Converters", IEEE International Conference on Signals and Electronic Systems (ICSES), Poznan, Poland, 2004.
24.
M. Becker, N. Lotze, J. Becker, M. Ortmanns and Y. Manoli, "Implementierung eines verlustleistungsoptimierten Dezimators für kaskadierte Sigma-Delta Analog-Digital Umsetzer", Advances in Radio Science Vol. 3 (Kleinheubacher Berichte 2004), pp. 389-393, Miltenberg, Germany, 2004.
23.
M. Keller, M. Ortmanns and Y. Manoli, "On the Implicit Anti-Aliasing Filter in Continuous Time Sigma Delta Modulators", IEEE International Conference on Signals and Electronic Systems (ICSES), Poznan, Poland, 2004.

2003

22.
M. Ortmanns, F. Gerfers and Y. Manoli, " A Continuous-Time Sigma-Delta Modulator with Switched Capacitor Controlled Current Mode Feedback ", European Solid-State Circuits Conference, Estoril, Portugal, 2003.
21.
M. Ortmanns, F. Gerfers and Y. Manoli, " Compensation of Finite Gain-Bandwidth Induced Errors in Continuous-Time Sigma-Delta Modulators", IEEE Int. Conf. on Electronics, Circuits and Systems, Sharjah, UAE, 2003.
20.
M. Ortmanns, F. Gerfers and Y. Manoli, " Ein zeitkontinuierlicher Sigma-Delta Modulator mit Stromquellen-Rückkopplung und reduzierter Clock-Jitter Empfindlichkeit ", ITG/ GMM -Diskussionssitzung ANALOG03, Heilbronn, Germany, 2003.
19.
M. Ortmanns, F. Gerfers and Y. Manoli, " Fundamental Limits of Jitter Insensitivity in discrete and Continuous-Time Sigma-Delta Modulators", IEEE Int. Symp. on Circuits and Systems, Bangkok, Thailand, 2003.
18.
M. Ortmanns, F. Gerfers and Y. Manoli, " Influence of finite Integrator Gain Bandwidth on Continuous-Time Sigma-Delta Modulators", IEEE Int. Symp. on Circuits and Systems, Bangkok, Thailand, 2003.
17.
M. Ortmanns, F. Gerfers and Y. Manoli, " The implementation of a continuous-time sigma-delta modulator with reduced sensitivity to clock jitter", GMM/GI/ITG Fachtagung - Entwurf Integrierter Schaltungen und Systeme, E.I.S.-Workshop, Erlangen, Germany, 2003.
16.
M. Ortmanns, F. Gerfers and Y. Manoli, " The implementation of a continuous-time sigma-delta modulator with reduced sensitivity to clock jitter", GMM/GI/ITG Fachtagung - Entwurf Integrierter Schaltungen und Systeme, E.I.S.-Workshop, Erlangen, Germany, 2003.
15.
F. Gerfers, M. Ortmanns and Y. Manoli, "A 1.5-V, 12-bit Power-Efficient Continuous-Time Third-Order Sigma-Delta Modulator ", IEEE Journal of Solid State Circuits, Vol.38, No.8, pp. 1343-1352, 2003.
14.
F. Gerfers, M. Ortmanns and Y. Manoli, "A 1V, 12-Bit Wideband Continuous-Time Sigma-Delta Modulator for UMTS Applications", IEEE Symposium on Circuits and Systems, Bangkok, Thailand, 2003.
13.
M. Becker, K. Heiber, M. Ortmanns and Y. Manoli, "A Power Optimized Decimator Architecture for Cascaded Sigma-Delta Analog-to-Digital Converters", International Conference on Electronics, Circuits and Systems, Sharjah, UAE, 2003.

2002

12.
M. Ortmanns, F. Gerfers and Y. Manoli, " A Continuous-Time Sigma-Delta Modulator with Reduced Jitter Sensitivity", European Solid-State Circuits Conference, Florence, Italy, 2002.
11.
M. Ortmanns, F. Gerfers, L. Samid and Y. Manoli, " Multirate Cascaded Continuous-Time Sigma-Delta Modulators", IEEE Int. Symp. on Circuits and Systems, Phoenix, USA, 2002.
10.
F. Gerfers, C. Hack, M. Ortmanns and Y. Manoli, "A 1.2V, 200µW Rail-to-Rail OpAmp with 90dB THD using Replica Gain Enhancement", European Solid-State Circuits Conference, Florence, Italy, 2002.
9.
L. Samid, F. Gerfers, M. Ortmanns and Y. Manoli, "A new kind of low power multibit third order CT-lowpass modulator", IEEE Symposium on Circuits and Systems, Phoenix, USA, 2002.
8.
F. Gerfers, K. M. Soh, M. Ortmanns and Y. Manoli, "Figure of Merit based Design Strategy for Low-Power Continuous-Time Sigma-Delta Modulators", IEEE Symposium on Circuits and Systems, Phoenix, USA, 2002.
7.
F. Gerfers, M. Ortmanns, L. Samid and Y. Manoli, "Implementation of a 1.5V Low-Power Clock-Jitter Insensitive Continuous-Time Sigma-Delta Modulator", IEEE Symposium on Circuits and Systems, Phoenix, USA, 2002.

2001

6.
M. Ortmanns, F. Gerfers and Y. Manoli, " Clock Jitter Insensitive Continous-Time Sigma-Delta Modulators", Int. Conf. on Electronics, Circuits and Systems, Sydney, Australia, 2001.
5.
M. Ortmanns, F. Gerfers and Y. Manoli, " On the Synthesis of Cascaded Continuous Time Sigma-Delta Modulators", V419-V422, IEEE Int. Symp. on Circuits and Systems, Sydney, Australia, 2001.

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
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
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
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
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
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

2007

4.
Ortmanns, M.; Buhmann, A.; Manoli, Y.
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

2005

2.
Ortmanns, M.; Gerfers, F.
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

Patents

  1. A. Herkle, J. Becker, M. Ortmanns
    [DE] Verfahren und Vorrichtung zur Erzeugung einer digitalen Signatur
    DE102016204055A1, Patent record available from the German Patent
    2016

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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