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Abstract:
This paper proposes a fully dynamic zoom ADC based on residue feedforward and correlated level shifting (CLS)-assisted floating inverter amplifier (FIA) technique with 200 × bandwidth/power scalability, by only changing the clock frequency. A CLS-assisted FIA which achieves 65 dB DC gain is employed to reduce errors from finite FIA gain. An energy-efficient residue feedforward path extracted from the input of the SAR ADC's comparator minimizes the leakage of the SAR ADC's quantization noise into the band. A novel two-step summation approach is proposed to minimize capacitor areas compared to a traditional passive switched-capacitor adder. The post-simulated results show the prototype ADC with near-constant energy efficiency, which scales power from 5 μW to 822 μW, achieves high resolution (>100 dB) during the scalable bandwidth. At 20 kHz BW, it achieves 106.2 dB DR, 102.0 dB SNDR, leading to FoMDR of 180.0 dB and FoMSNDR of 175.8 dB. © 2024
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Microelectronics Journal
ISSN: 0959-8324
Year: 2024
Volume: 154
1 . 9 0 0
JCR@2023
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 4
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