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- W2912871978 abstract "This paper introduces a voltage-controlled oscillator (VCO)-based nonuniform sampling (NUS) analog-to-digital converter (ADC), which shifts the conventional voltage-domain level crossing to the phase domain, thus eliminating the need for any continuous-time (CT) comparator or reference generator. It increases the signal bandwidth and reduces the implementation costs of both analog and digital circuitries compared to the existing voltage-domain NUS ADCs. The signal-to-quantization-noise ratio (SQNR) is improved by the first-order noise shaping and inherent dithering via the free-running oscillation of VCO. The quantization error of the proposed architecture is analyzed, and a phase-domain calibration on the VCO nonlinearity is proposed. Due to the mostly digital architecture and time-based nature of the proposed architecture, the performance and figure of merit (FOM) are expected to improve with the scaled technology. This prototype achieves 200-MHz bandwidth with 60-dB dynamic range (DR) and consumes 19.7 mW of power with an active area of 0.13 mm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> in 65-nm complementary metal-oxide-semiconductor (CMOS), where the nonuniform digital signal processing (DSP) is performed off chip. The estimated power and area of the nonuniform DSP including the calibration and decimation filter are 30 mW and 0.114 mm <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sup> , respectively." @default.
- W2912871978 created "2019-02-21" @default.
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- W2912871978 date "2019-03-01" @default.
- W2912871978 modified "2023-10-14" @default.
- W2912871978 title "A Noise-Shaped VCO-Based Nonuniform Sampling ADC With Phase-Domain Level Crossing" @default.
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- W2912871978 doi "https://doi.org/10.1109/jssc.2019.2892426" @default.
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