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author:

Wei, Rongshan (Wei, Rongshan.) [1] (Scholars:魏榕山) | Zheng, Zhijian (Zheng, Zhijian.) [2] | Lin, Yuxuan (Lin, Yuxuan.) [3] | Xu, Nannan (Xu, Nannan.) [4] | Zhao, Gumeng (Zhao, Gumeng.) [5] | Chen, Qunchao (Chen, Qunchao.) [6]

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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

Keyword:

Capacitor bank Capacitors Comparators (optical)

Community:

  • [ 1 ] [Wei, Rongshan]School of Physics and Information Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 2 ] [Zheng, Zhijian]School of Physics and Information Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 3 ] [Lin, Yuxuan]School of Physics and Information Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 4 ] [Xu, Nannan]School of Physics and Information Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 5 ] [Zhao, Gumeng]School of Physics and Information Engineering, Fuzhou University, Fuzhou; 350116, China
  • [ 6 ] [Chen, Qunchao]School of Physics and Information Engineering, Fuzhou University, Fuzhou; 350116, China

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Source :

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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Chinese Cited Count:

30 Days PV: 4

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