Papers
2024
45.
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
Confidence Estimation and Boosting for Dynamic-Comparator Transient-Noise Analysis
22nd IEEE Interregional NEWCAS Conference (NEWCAS)
September 2024
| DOI: | 10.1109/NewCAS58973.2024.10666354 |
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
June 2024
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
June 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
May 2024
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
May 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
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
January 2024
DAC Element Mismatch Shaping Algorithms in Incremental Delta-Sigma ADCs
IEEE International Symposium on Circuits and Systems (ISCAS), Singapore
January 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
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
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
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
June 2023
Bitwise ELD Compensation under Integrator Nonidealities in ΔΣ Modulators
21st IEEE Interregional NEWCAS Conference (NEWCAS), Edinburgh, United Kingdom
June 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
May 2023
Delay Error Shaping in ΔΣ Modulators Using Time-Interleaved High Resolution Quantizers
IEEE Transactions on Circuits and Systems I: Regular Papers
May 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
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
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
June 2022
A Direct Digitizing Chopped Neural Recorder Using a Body-Induced Offset Based DC Servo Loop
IEEE Transactions on Biomedical Circuits and Systems
June 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
May 2022
Bitwise ELD Compensation in ∆Σ Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, USA
May 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)
May 2022
Complexity Reduced LUT-Based DAC Correction in Continuous-Time Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS)
May 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
May 2022
Maximizing the Inter-Stage Gain in CT 0-X MASH Delta-Sigma-Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Austin, TX, USA
May 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
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
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
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)
May 2021
FIR filter with Symmetric Non-Equal Coefficients for CT Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea (Online)
May 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)
May 2021
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)
May 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
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
2020
23.
Abdelaal,
A.;
Kauffman,
J. G.;
Mokhtar,
M. A.;
Ortmanns,
M.
A Comparative Study of ISI Errors in Different DAC Structures for CT Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
A Comparative Study of ISI Errors in Different DAC Structures for CT Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
22.
Mokhtar,
M. A.;
Vogelmann,
P.;
Abdelaal,
A.;
Kauffman,
J. G.;
Ortmanns,
M.
FIR DACs in CT Incremental Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
FIR DACs in CT Incremental Delta-Sigma Modulators
IEEE International Symposium on Circuits and Systems (ISCAS), Sevilla, Spain
October 2020
2018
21.
Sauerbrey,
J.;
San Pablo Garcia,
J.;
Schütz,
U.;
Khushk,
H.;
Kauffman,
J. G.
A Multi-mode GSM to LTE100 ADC
ESSCIRC 2018 - 44th IEEE European Solid State Circuits Conference, Dresden, Germany
September 2018
A Multi-mode GSM to LTE100 ADC
ESSCIRC 2018 - 44th IEEE European Solid State Circuits Conference, Dresden, Germany
September 2018
Patents
- John G. Kauffman
Low supply class AB output amplifier
[US9859856B1], Intel IP Corp. - 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 - John G. Kauffman, Krzysztof Dufrene
Apparatus for overload recovery of an integrator in a sigma-delta modulator
[US9680496B2], Intel IP Corp.
2015 - John G. Kauffman, Udo Schuetz
Single amplifer bi-quad sigma-delta modulator
[US9559719B1], Intel IP Corp.
2015 - John G. Kauffman, Udo Schuetz
Apparatus for correcting linearity of a digital-to-analog converter
[US9509326B1], Intel IP Corp.
2015