Institut für Mikroelektronik

Publications - Dr.-Ing. J. G. Kauffman

Papers  Patents

Papers

2025

48.
Driemeyer, B.; Mandry, H.; Wiens, D.-P.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
17.5 An Eye-Opening Arbiter PUF for Fingerprint Generation Using Auto-Error Detection for PVT-Robust Masking and Bit Stabilization Achieving a BER of 2e-8 in 28nm CMOS
IEEE International Solid-State Circuits Conference (ISSCC), San Francisco, CA, USA
Februar 2025

2024

47.
Conrad, J.; Kauffman, J. G.; Wilhelmstätter, S.; Asthana, R.; Belagiannis, V.; Ortmanns, M.
Confidence Estimation and Boosting for Dynamic-Comparator Transient-Noise Analysis
22nd IEEE Interregional NEWCAS Conference (NEWCAS)
September 2024
DOI:10.1109/NewCAS58973.2024.10666354
46.
Abdelaal, A.; Pietzko, M.; Kauffman, J. G.; Jain, A.; Ortmanns, M.
ΔΣ Modulators Employing MASH DSM DAC-Based Dual Quantization
IEEE Transactions on Circuits and Systems I: Regular Papers ( Volume: 72, Issue: 1, Page(s) 71-84, January 2025)
August 2024
DOI:10.1109/TCSI.2024.3448224
45.
Abdelaal, A.; Pietzko, M.; Ungethüm, J.; Kauffman, J. G.; Ortmanns, M.
Using Negative-R Assisted Integrators in Wide-band Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
Juli 2024
DOI:10.1109/ISCAS58744.2024.10558442
44.
Dalla Longa, M.; Conzatti, F.; Ismail, O.; Kauffman, J. G.; Ortmanns, M.
A 470μW, 102.6dB-DR, 20kHz BW Calibration-Free ΔΣ Modulator with SFDR in Excess of 110dBc using an Intrinsically Linear 13-Level DAC
IEEE Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits), Honolulu, HI, USA, 2024, pp. 1-2
Juni 2024
DOI:10.1109/VLSITechnologyandCir46783.2024.10631405
43.
Pietzko, M.; Ungethüm, J.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
A 600MS/s 10-bit SAR ADC with unit via-based delta-length C-DAC in 22nm FDSOI
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
Mai 2024
DOI:10.1109/ISCAS58744.2024.10558087
42.
Ismail, O.; Kässer, P.; Kauffman, J. G.; Ortmanns, M.
Non-Ideal Reset in Incremental Delta-Sigma ADCs
IEEE 22nd Interregional NEWCAS Conference Sherbrooke, Quebec, Canada
April 2024
41.
Ismail, O.; Kässer, P.; Kauffman, J. G.; Ortmanns, M.
DAC Element Mismatch Shaping Algorithms in Incremental Delta-Sigma ADCs
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
Januar 2024
DOI:10.1109/ISCAS58744.2024.10558337

2023

40.
Mokhtar, M. A.; Ismail, O.; Vogelmann, P.; Kauffman, J. G.; Ortmanns, M.
A 40 kS/sCalibration-Free Incremental △Σ ADC Achieving 104 dB DR and 105.7 dB SFDR
ESSCIRC 2023- IEEE 49th European Solid State Circuits Conference (ESSCIRC), Lisbon, Portugal, pp. 401-404
September 2023
DOI:10.1109/ESSCIRC59616.2023.10268735
39.
Ungethüm, J.; Pietzko, M.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
A Chopped 6-bit 1.6 GS/s SAR ADC Utilizing Slow Decision Information in 22 nm FDSOI
ESSCIRC 2023- IEEE 49th European Solid State Circuits Conference (ESSCIRC)
September 2023
DOI:10.1109/ESSCIRC59616.2023.10268704
38.
Jang, MH.; Tang, X.; Lim, Y.; Kauffman, J. G.; Sun, L.; Ortmanns, M.; Chae, Y.
Design Techniques for Energy Efficient Analog-to-Digital Converters
IEEE Open Journal of the Solid-State Circuits Society
September 2023
DOI:10.1109/OJSSCS.2023.3311418
37.
Pietzko, M.; Spiess, J.; Ungethüm, J.; Kauffman, J. G.; Li, Q.; Ortmanns, M.
Bitwise ELD Compensation under Integrator Nonidealities in ΔΣ Modulators
21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, United Kingdom
Juni 2023
DOI:10.1109/NEWCAS57931.2023.10198050
36.
Pietzko, M.; Ungethüm, J.; Kauffman, J. G.; Ortmanns, M.
Delay Error Shaping in ΔΣ Modulators Using Time-Interleaved High Resolution Quantizers
IEEE Transactions on Circuits and Systems I: Regular Papers
Mai 2023
DOI:10.1109/TCSI.2023.3269573
35.
Dalla Longa, M.; Conzatti, F.; Hofmann, T.; Kauffman, J. G.; Ortmanns, M.
An Intrinsically Linear 13-Level Capacitive DAC for Delta Sigma Modulators
IEEE Transactions on Circuits and Systems II: Express Briefs
April 2023
DOI:doi.org/10.1109/TCSII.2022.3224878

2022

34.
Mokhtar, M. A.; Abdelaal, A.; Sporer, M.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
A 0.9-V DAC-Calibration-Free Continuous-Time Incremental Delta-Sigma Modulator Achieving 97-dB SFDR at 2 MS/s in 28-nm CMOS
IEEE Journal of Solid-State Circuits, Volume: 57, Issue: 11
November 2022
DOI:10.1109/JSSC.2022.3160325
33.
Sporer, M.; Reich, S.; Kauffman, J. G.; Ortmanns, M.
A Direct Digitizing Chopped Neural Recorder Using a Body-Induced Offset Based DC Servo Loop
IEEE Transactions on Biomedical Circuits and Systems
Juni 2022
DOI:10.1109/TBCAS.2022.3177241
32.
Pietzko, M.; Ungethüm, J.; Kauffman, J. G.; Li, Q.; Ortmanns, M.
Bitwise ELD Compensation in ∆Σ Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, USA
Mai 2022
DOI:10.1109/ISCAS48785.2022.9937305
31.
Driemeyer, B.; Spiess, J.; Kauffman, J. G.; Ortmanns, M.
Complexity Reduced LUT-Based DAC Correction in Continuous-Time Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS)
Mai 2022
DOI:10.1109/ISCAS48785.2022.9937300
30.
Ungethüm, J.; Pietzko, M.; Kauffman, J. G.; Li, Q.; Ortmanns, M.
Maximizing the Inter-Stage Gain in CT 0-X MASH Delta-Sigma-Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, TX, USA
Mai 2022
DOI:10.1109/ISCAS48785.2022.9937739

2021

29.
Mokhtar, M. A.; Merkle, M.; Kauffman, J. G.; Ortmanns, M.
A Comparative Study of Noise Behavior in Single-Opamp Resonators in Delta-Sigma Modulators
28th IEEE International Conference on Electronics, Circuits, and Systems (ICECS), Dubai, UAE
November 2021
28.
Ungethüm, J.; Kauffman, J. G.; Ortmanns, M.
Digital Resolution Requirements in 0-X Mash Delta-Sigma-Modulators
2021 IEEE International Conference on Electronics Circuits and Systems (ICECS)
November 2021
27.
Ungethüm, J.; Kauffman, J. G.; Ortmanns, M.
Minimizing Signal-Dependent Residue in CT Pipelined ADCs
2021 IEEE International Midwest Symposium on Circuits and Systems (MWSCAS)
August 2021
26.
Abdelaal, A.; Pietzko, M.; Mokhtar, M. A.; Kauffman, J. G.; Ortmanns, M.
FIR filter with Symmetric Non-Equal Coefficients for CT Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea (Online)
Mai 2021
25.
Pietzko, M.; Wagner, J.; Abdelaal, A.; Kauffman, J. G.; Ortmanns, M.
Influence of Excess Loop Delay on the STF of Continuous-Time Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea (Online)
Mai 2021
24.
Mokhtar, M. A.; Abdelaal, A.; Sporer, M.; Becker, J.; Kauffman, J. G.; Ortmanns, M.
A 0.9-V Calibration-Free 97dB-SFDR 2-MS/s Continuous­Time Incremental Delta-Sigma ADC Utilizing Variable Bit-Width Quantizer in 28nm CMOS
IEEE Custom Integrated Circuits Conference (CICC), Texas, USA (Virtual)
April 2021

Patents

  1. John G. Kauffman
    Low supply class AB output amplifier
    [US9859856B1], Intel IP Corp.

  2. Marco Bresciani, John G. Kauffman, Udo Schuetz, Patrick Torta, Francesco Conzatti 
    Sigma-delta analog-to-digital converter including loop filter having components for feedback digital-to-analog converter correction
    [US9866227B1]
    2016

  3. John G. Kauffman, Krzysztof Dufrene
    Apparatus for overload recovery of an integrator in a sigma-delta modulator
    [US9680496B2], Intel IP Corp.
    2015

  4. John G. Kauffman, Udo Schuetz
    Single amplifer bi-quad sigma-delta modulator
    [US9559719B1], Intel IP Corp.
    2015

  5. John G. Kauffman, Udo Schuetz
    Apparatus for correcting linearity of a digital-to-analog converter
    [US9509326B1], Intel IP Corp.
    2015