Active Noise Shaping SAR ADC Based on ISDM with the 5MHz Bandwidth

Gao, Bo; Li, Xin; Yan, Chenggang; Wu, Jianhui

doi:10.1109/iscas45731.2020.9180950

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…Similarly, other interesting works on MASH have been reported [72,73]. Incremental NS SAR implementations should not be neglected either, as they may be promising architectures in the near future [74,75].…”

Section: Trends Further Advances and Conclusionmentioning

confidence: 96%

A Review on Fundamentals of Noise-Shaping SAR ADCs and Design Considerations

Arzate-Palma,

Rivera-Orozco,

Molina Salgado

et al. 2024

Chips

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A general overview of Noise-Shaping Successive Approximation Register (SAR) analog-to-digital converters is provided, encompassing the fundamentals, operational principles, and key architectures of Noise-Shaping SAR (NS SAR). Key challenges, including inherent errors in processing circuits, are examined, along with current advancements in architecture design. Various issues, such as loop filter optimization, implementation methods, and DAC network element mismatches, are explored, along with considerations for voltage converter performance. The design of dynamic comparators is examined, highlighting their critical role in the SAR ADC architecture. Various architectures of dynamic comparators are extensively explored, including optimization techniques, performance considerations, and emerging trends. Finally, emerging trends and future challenges in the field are discussed.

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Section: Trends Further Advances and Conclusionmentioning

confidence: 96%

A Review on Fundamentals of Noise-Shaping SAR ADCs and Design Considerations

Arzate-Palma,

Rivera-Orozco,

Molina Salgado

et al. 2024

Chips

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show abstract

“…De igual manera, otros trabajos interesantes de MASH han sido reportados en [62,63]. No debe dejarse tampoco de lado las implementaciones Incremental NS SAR, que pueden ser arquitecturas promisorias en un futuro cercano [64,65].…”

Section: Tendencias Y Línea De Trabajo Actualunclassified

Revisión general de ADCs tipo Noise Shaping SAR: Fundamentos, retos y tendencias

Orozco¹,

Linares

Salgado

et al. 2023

Rev. Mex. Fís.

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Se presenta una introducción al estudio de los convertidores analógico-digital de aproximaciones sucesivas (SAR) tipo Noise Shaping, así como una descripción general de los fundamentos del Noise Shaping SAR (NS SAR), sus principios básicos de operación y principales arquitecturas. Se abordan los problemas abiertos, se revisan los desafíos fundamentales y las fuentes de error principales en los circuitos de procesamiento, y se resumen los desarrollos de las arquitecturas de vanguardia, que hacen frente a diversos problemas que incluye el filtro de lazo, sus implementaciones pasivas/activas, y el mismatch presente en los elementos de red del DAC, entre otros. Adicionalmente, se exponen las tendencias y retos futuros.

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“…The 1st stage loop filter is an active type, for the implementation of a sharp noise transfer function (NTF). To alleviate the power consumption problem, which is a disadvantage of the active type, integration and amplification are performed simultaneously by a single amplifier to prevent the additional use of an amplifier [16][17][18]. To maintain the original transfer function of the loop filter, the amplified signal is attenuated again by a multi-input comparator gain.…”

Section: Introductionmentioning

confidence: 99%

A Pipelined Noise-Shaping SAR ADC Using Ring Amplifier

Lee

Kim

et al. 2021

Electronics

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In this study, a pipelined noise-shaping successive-approximation register analog-to-digital converter (PLNS-SAR ADC) structure was proposed to achieve high resolution and to be free from comparator design requirements. The inter-stage amplifier and integrator of the PLNS-SAR ADC were implemented through a ring amplifier with high gain and speed. The ring amplifier was designed to improve power efficiency and be tolerant to process–voltage–temperature (PVT) variation, and uses a single loop common-mode feedback (CMFB) circuit. By processing residual signals with a single ring amplifier, power efficiency can be maximized, and a low-power system with 30% lower power consumption than that of a conventional PLNS-SAR ADC is implemented. With a high-gain ring amplifier, noise leakage is greatly suppressed, and a structure can be implemented that is tolerant of mismatches between the analog loop and digital correction filters. The measured signal to noise distortion ratio (SNDR) is 70 dB for a 5.15 MHz bandwidth (BW) at a 72 MS/s sampling rate (Fs) with an oversampling ratio (OSR) of 7, and the power consumption is 2.4 mW. The (= SNDR + BW/Power) is 163.5 dB. The proposed structure in this study can achieve high resolution and wide BW with good power efficiency, without a filter calibration process, through the use of a ring amplifier in the PLNS-SAR ADC.

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Active Noise Shaping SAR ADC Based on ISDM with the 5MHz Bandwidth

Cited by 5 publications

References 10 publications

A Review on Fundamentals of Noise-Shaping SAR ADCs and Design Considerations

A Review on Fundamentals of Noise-Shaping SAR ADCs and Design Considerations

Revisión general de ADCs tipo Noise Shaping SAR: Fundamentos, retos y tendencias

A Pipelined Noise-Shaping SAR ADC Using Ring Amplifier

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