Institute of Microelectronics

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

Papers  Books  Patents 

Papers

2016

254.
J. Anders, J. Handwerker, B. Schlecker, M. Ortmanns, J. Möser, A. Schnegg and K. Lips, "Using CMOS voltage-controlled oscillators for ultra-fast rapid scan ESR experiments", 58th Rocky Mountain Conference on Magnetic Resonance, Breckenridge, USA, Jul. 2016.
253.
C. Chu, J. Wagner, A. Al Marashli, J. Chi and M. Ortmanns, "A Study on Op-amp Nonlinearity in a Single-bit CT Modulator Employing GBW Compensation", Conference on PhD Research in Microelectronics and Electronics (PRIME 2016), Lisbon, Portugal, Jun. 2016.
252.
M. Haas and M. Ortmanns, "A floating high-voltage level-shifter with high area efficiency for biomedical implants", 12th Conference on PhD Research in Microelectronics and Electronics (PRIME 2016), Lisbon, Portugal, Jun. 2016.
251.
J. Wagner, R. Ritter and M. Ortmanns, "STF Engineering in CT Sigma-Delta Modulators using www.sigma-delta.de", Conference on PhD Research in Microelectronics and Electronics (PRIME 2016), Lisbon, Portugal, Jun. 2016.
250.
M. Haas, U. Bihr, J. Anders and M. Ortmanns, "A Bidirectional Neural Interface IC with High Voltage Compliance and Spectral Separation", IEEE International Symposium on Circuits and Systems (ISCAS 2016), Montréal, Québec, Canada, May 2016.
249.
A. Al Marashli, J. Anders and M. Ortmanns, "A Hybrid Comparator for High Resolution SAR ADC", IEEE International Symposium on Circuits and Systems (ISCAS 2016), Montréal, Québec, Canada, May 2016.
248.
D. Djekic, M. Ortmanns, G. Fantner and J. Anders, "A Tunable, Robust Pseudo-Resistor with Enhanced Linearity for Scanning Ion-Conductance Microscopy", IEEE International Symposium on Circuits and Systems (ISCAS 2016), Montréal, Québec, Canada, May 2016.
247.
J. Wagner, R. Ritter and M. Ortmanns, "Using www.sigma-delta.de to Rapidly Obtain ELD Compensated CT ΣΔ Modulators", IEEE International Symposium on Circuits and Systems (ISCAS 2016), Montréal, Québec, Canada, May 2016.
246.
P. Vogelmann, M. Haas, J. Anders and M. Ortmanns, "Design eines Sample-and-Hold Verstärkers für einen 16-Bit SD-Modulator in 180nm CMOS", Analogworkshop 2016, Leibniz Universität Hannover, Mar. 2016.
245.
R. Ritter, J. G. Kauffman, J. Becker and M. Ortmanns, "A 10 MHz Bandwidth, 70 dB SNDR Continuous Time Delta-Sigma Modulator With Digitally Improved Reconfigurable Blocker Rejection", IEEE Journal of Solid-State Circuits, vol. 51, no. 3, pp. 660-670, Mar. 2016.
244.
J. Anders, J. Handwerker, M. Ortmanns and G. Boero, "A low-power high-sensitivity single-chip receiver for NMR microscopy", Journal of Magnetic Resonance, vol. 266, pp. 41-50, Mar. 2016.
243.
D. Djekic, M. Ortmanns, G. Fantner and J. Anders, "Linearisierte Pseudo-Widerstände mit hoher Robustheit für die Raster-Ionenstrommikroskopie", Analogworkshop 2016, Leibniz Universität Hannover, Mar. 2016.
242.
J. Handwerker, B. Schlecker, U. Wachter, P. Radermacher, M. Ortmanns and J. Anders, "A 14 GHz, battery operated, point-of-care ESR spectrometer based on a 130 nm CMOS ASIC", IEEE International Solid-State Circuits Conference (ISSCC 2016), San Francisco, CA, USA, Jan. 2016.
241.
M. Pagin, M. Haas, J. Becker and M. Ortmanns, "Delta compression in time-multiplexed multichannel neural recorders", 12th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME), pp. 1-4, Lisbon, Portugal, 2016.

2015

240.
R. Ritter and M. Ortmanns, "Continuous-Time Delta-Sigma ADCs With Improved Interferer Rejection", Emerging and Selected Topics in Circuits and Systems, IEEE Journal, vol.5, no.4, pp.500-513, Dec. 2015.
239.
S. Fahmy, M. Dietl, P. Sareen, M. Ortmanns and J. Anders, "A BW-tracking semi-digital PLL with near-optimal VCO phase noise shaping in low-cost 0.4 μm CMOS achieving 700 fs rms phase jitter", IEEE Nordic Circuits and Systems Conference (NORCAS) 2015, Oslo, Norway, Oct. 2015.
238.
A. Elkafrawy, J. Anders and M. Ortmanns, "A 10-bit Reference Free Current Mode SAR ADC with 58.4 dB SFDR at 50 MS/s in 90 nm CMOS", IEEE Nordic Circuits and Systems Conference (NORCAS), Oslo, Norway, Oct. 2015.
237.
T. Liu, J. Anders and M. Ortmanns, "A Bidirectional Optical Transcutaneous Telemetric Link for Brain Machine Interface", Electronic letters, Sep. 2015.
236.
R. Ritter, P. Torta, L. Dörrer, A. Di Giandomenico, S. Herzinger and M. Ortmanns, "A Multimode CT ΔΣ-Modulator with a Reconfigurable Digital Feedback Filter for Semi-Digital Blocker/Interferer Rejection", European Solid-State Circuits Conference (ESSCIRC), Graz, Austria, Sep. 2015.
235.
A. Elkafrawy, J. Anders and M. Ortmanns, "Design and Validation of a Current Mode Based SAR ADC in 90 nm CMOS", Kleinheubacher Tagung, Miltenberg, Germany, Sep. 2015.
234.
M. Lorenz, J. Becker and M. Ortmanns, "A Hybrid of Unscented Kalman Filter and Genetic Algorithm for State and Parameter Estimation in Sigma-Delta Modulators", Electronics Letters, IEEE, Aug. 2015.
233.
J. Handwerker, M. Eschelbach, A. Hoffmann, M. Ortmanns, K. Scheffler and J. Anders, "An Array of Active TX/RX 19F NMR Field Probes for Gradient Trajectory Mapping", Euromar 2015, Prague, Czech Republic, Jul. 2015.
232.
A. Elkafrawy, J. Anders and M. Ortmanns, "A 10-bit 150 MS/s Current Mode SAR ADC in 90 nm CMOS", 11th IEEE Conference on PhD Research in Microelectronics and Electronics (IEEE PRIME 2015), Glasgow, Scotland, United Kingdom, Jun. 2015.
231.
A. Al Marashli, J. Anders and M. Ortmanns, "Design study on a SAR ADC using an incremental sigma-delta-DAC", 11th Conference on PhD Research in Microelectronics and Electronics (IEEE PRIME 2015), Glasgow, Scotland, United Kingdom, Jun. 2015.
230.
C. Chu, J. Anders, J. Becker and M. Ortmanns, "Finite GBW Compensation Technique for CT Delta-Sigma Modulators with Differentiator Based ELD Compensation", IEEE NEWCAS 2015, Grenoble, France, Jun. 2015.

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