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- W4293428392 abstract "This article presents a fully passive noise-shaping (NS) successive approximation register (SAR) analog-to-digital converter (ADC) that can be compatible with dynamic voltage and frequency scaling (DVFS) schemes while offering a 12-bit resolution for Internet-of-Things (IoT) sensor applications. To realize a voltage-scalable suppression of the in-band quantization noise, the proposed ADC utilizes a second-order cascade of integrators with feedforward (CIFF) NS loop with a 3-input dynamic comparator, which can obtain an additional resolution of more than 3 bits. A cyclic dynamic element matching (CDEM) for MSB is seamlessly combined with the NS operation and simply realized by shift registers (SRs). The MSB CDEM reduces dominant in-band harmonic distortions due to capacitor mismatch by not only averaging out but also randomizing the MSB mismatch errors with modulation dither from the CIFF NS loop. In addition, a last-bit majority voting (LMV) technique is applied when resolving the LSB to reduce the comparator noise by half with four additional cycles. With both the LMV and CDEM techniques enabled, the SNR and SNDR are enhanced to 73.3 and 72.3 dB, respectively. The ADC achieves an ENOB of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$11.2-11.7$ </tex-math></inline-formula> bits with a reconfigurable bandwidth of 10–50 kHz at a supply voltage of 0.6–1 V. The prototype ADC was fabricated using 28-nm CMOS technology, occupying an active area of 0.0575 mm2." @default.
- W4293428392 created "2022-08-29" @default.
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- W4293428392 date "2022-10-01" @default.
- W4293428392 modified "2023-09-29" @default.
- W4293428392 title "A Fully Passive Noise-Shaping SAR ADC Utilizing Last-Bit Majority Voting and Cyclic Dynamic Element Matching Techniques" @default.
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- W4293428392 doi "https://doi.org/10.1109/tvlsi.2022.3190927" @default.
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