This paper presents a novel second-order passive noise shaping (NS) successive approximation register (SAR) analog-to-digital converter (ADC) based on active gain. The proposed scheme achieves a further improvement in the signal-to-noise ratio (SNR) of the proposed NS SAR ADC by reducing the kT/C noise and the conversion rate. After having presented the conversion principle, the theoretical analysis of the performance enhancement based on noise and other considerations is presented.
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Jia et al. (2024) studied this question.
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