Wideband Continuous-Time MASH ADCs: Principles, Challenges, and Prospects
Continuous-time (CT) delta-sigma modulator (DSM) is a popular choice for its inherent aliasing and resistive input impedance characteristics. With the increased demands for wide-bandwidth (BW) and high-dynamic range (DR), multistage noise shaping (MASH) presents prominent benefits of high-order nois...
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of the Solid-State Circuits Society |
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| Online Access: | https://ieeexplore.ieee.org/document/10892233/ |
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| author | Ke Li Liang Qi Mingqiang Guo Rui P. Martins Sai-Weng Sin |
| author_facet | Ke Li Liang Qi Mingqiang Guo Rui P. Martins Sai-Weng Sin |
| author_sort | Ke Li |
| collection | DOAJ |
| description | Continuous-time (CT) delta-sigma modulator (DSM) is a popular choice for its inherent aliasing and resistive input impedance characteristics. With the increased demands for wide-bandwidth (BW) and high-dynamic range (DR), multistage noise shaping (MASH) presents prominent benefits of high-order noise-shaping (NS) without being constrained by <inline-formula> <tex-math notation="LaTeX">$\Delta \Sigma $ </tex-math></inline-formula> loop stability issues. Recent literature on CT MASH DSM showed promising progress in overcoming the design challenges under wideband application, including signal and quantization leakage, analog-digital matching complexity, signal transfer function (STF) peaking, and high-speed excess loop delay (ELD) compensation. This review article introduces fundamental models and primary design considerations, then discusses the CT MASH DSM’s key challenges and corresponding solutions. Finally, we provide two implementation examples of this architecture with their highlights and challenges. |
| format | Article |
| id | doaj-art-ce216acdb8044d9c86b947d6202d7fa0 |
| institution | DOAJ |
| issn | 2644-1349 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of the Solid-State Circuits Society |
| spelling | doaj-art-ce216acdb8044d9c86b947d6202d7fa02025-08-20T02:40:40ZengIEEEIEEE Open Journal of the Solid-State Circuits Society2644-13492025-01-01510411510.1109/OJSSCS.2025.354376110892233Wideband Continuous-Time MASH ADCs: Principles, Challenges, and ProspectsKe Li0https://orcid.org/0009-0007-1573-7821Liang Qi1https://orcid.org/0000-0002-9512-4529Mingqiang Guo2https://orcid.org/0000-0001-9279-9603Rui P. Martins3https://orcid.org/0000-0003-2821-648XSai-Weng Sin4https://orcid.org/0000-0001-9346-8291State-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, ChinaDepartment of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, ChinaState-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, ChinaState-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, ChinaState-Key Laboratory of Analog and Mixed-Signal VLSI, Institute of Microelectronics, University of Macau, Macau, ChinaContinuous-time (CT) delta-sigma modulator (DSM) is a popular choice for its inherent aliasing and resistive input impedance characteristics. With the increased demands for wide-bandwidth (BW) and high-dynamic range (DR), multistage noise shaping (MASH) presents prominent benefits of high-order noise-shaping (NS) without being constrained by <inline-formula> <tex-math notation="LaTeX">$\Delta \Sigma $ </tex-math></inline-formula> loop stability issues. Recent literature on CT MASH DSM showed promising progress in overcoming the design challenges under wideband application, including signal and quantization leakage, analog-digital matching complexity, signal transfer function (STF) peaking, and high-speed excess loop delay (ELD) compensation. This review article introduces fundamental models and primary design considerations, then discusses the CT MASH DSM’s key challenges and corresponding solutions. Finally, we provide two implementation examples of this architecture with their highlights and challenges.https://ieeexplore.ieee.org/document/10892233/Analog-to-digital converter (ADC)continuous-time (CT)delta-sigma modulator (DSM)excess loop delay (ELD)multistage noise shaping (MASH)oversampling (OS) |
| spellingShingle | Ke Li Liang Qi Mingqiang Guo Rui P. Martins Sai-Weng Sin Wideband Continuous-Time MASH ADCs: Principles, Challenges, and Prospects IEEE Open Journal of the Solid-State Circuits Society Analog-to-digital converter (ADC) continuous-time (CT) delta-sigma modulator (DSM) excess loop delay (ELD) multistage noise shaping (MASH) oversampling (OS) |
| title | Wideband Continuous-Time MASH ADCs: Principles, Challenges, and Prospects |
| title_full | Wideband Continuous-Time MASH ADCs: Principles, Challenges, and Prospects |
| title_fullStr | Wideband Continuous-Time MASH ADCs: Principles, Challenges, and Prospects |
| title_full_unstemmed | Wideband Continuous-Time MASH ADCs: Principles, Challenges, and Prospects |
| title_short | Wideband Continuous-Time MASH ADCs: Principles, Challenges, and Prospects |
| title_sort | wideband continuous time mash adcs principles challenges and prospects |
| topic | Analog-to-digital converter (ADC) continuous-time (CT) delta-sigma modulator (DSM) excess loop delay (ELD) multistage noise shaping (MASH) oversampling (OS) |
| url | https://ieeexplore.ieee.org/document/10892233/ |
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