Print Email Facebook Twitter Cryogenic Comparator Characterization and Modeling for a Cryo-CMOS 7b 1-GSa/s SAR ADC Title Cryogenic Comparator Characterization and Modeling for a Cryo-CMOS 7b 1-GSa/s SAR ADC Author Kiene, G. (TU Delft QCD/Sebastiano Lab; TU Delft QuTech Advanced Research Centre) GUNAPUTI SREENIVASULU, A.M. (TU Delft Electrical Engineering, Mathematics and Computer Science; TU Delft QuTech Advanced Research Centre) Overwater, R.W.J. (TU Delft QCD/Sebastiano Lab; TU Delft QuTech Advanced Research Centre) Babaie, M. (TU Delft Electronics; TU Delft QuTech Advanced Research Centre) Sebastiano, F. (TU Delft Quantum Circuit Architectures and Technology; TU Delft QuTech Advanced Research Centre) Faculty Electrical Engineering, Mathematics and Computer Science Date 2022 Abstract This paper reports the experimental characterization and modelling of a stand-Alone StrongARM comparator at both room temperature (RT) and cryogenic temperature (4.2 K). The observed 6-dB improvement in the comparator input noise at 4.2 K is attributed to the reduction of the thermal noise and to the suppressed shot noise in the MOS transistors becoming dominant at cryogenic temperature. The proposed model is employed in the design of a loop-unrolled 2\times time-interleaved 1-GSa/s 7b SAR ADC for spin-qubit readout. As predicted by the comparator model, the ADC is noise-limited at RT to a SNDR of 38.2 dB at Nyquist input, while this improves to 41.1 dB at 4.2 K, now limited by distortion, thus resulting in the state-of-The-Art FoMw for cryo-CMOS ADC of 20.9 fJ/conv-step. Subject ADCCryo-CMOSlatching comparatornoise measurementSARstrongARM To reference this document use: http://resolver.tudelft.nl/uuid:1815d450-4131-4d59-b9ea-454da9225be1 DOI https://doi.org/10.1109/ESSCIRC55480.2022.9911474 Publisher Institute of Electrical and Electronics Engineers (IEEE) Embargo date 2023-07-01 ISBN 978-1-6654-8494-7 Source ESSCIRC 2022 - IEEE 48th European Solid State Circuits Conference, Proceedings Event 48th IEEE European Solid State Circuits Conference, ESSCIRC 2022, 2022-09-19 → 2022-09-22, Milan, Italy Series ESSCIRC 2022 - IEEE 48th European Solid State Circuits Conference, Proceedings Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type conference paper Rights © 2022 G. Kiene, A.M. GUNAPUTI SREENIVASULU, R.W.J. Overwater, M. Babaie, F. Sebastiano Files PDF Cryogenic_Comparator_Char ... AR_ADC.pdf 4.99 MB Close viewer /islandora/object/uuid:1815d450-4131-4d59-b9ea-454da9225be1/datastream/OBJ/view