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author:

Wei, R. (Wei, R..) [1] | Zheng, Z. (Zheng, Z..) [2] | Lin, Y. (Lin, Y..) [3] | Xu, N. (Xu, N..) [4] | Zhao, G. (Zhao, G..) [5] | Chen, Q. (Chen, Q..) [6]

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Scopus

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:

Correlated level shifting Dynamic Floating inverter amplifier Residue feedforward Two-step summation Zoom ADC

Community:

  • [ 1 ] [Wei R.]School of Physics and Information Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 2 ] [Zheng Z.]School of Physics and Information Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 3 ] [Lin Y.]School of Physics and Information Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 4 ] [Xu N.]School of Physics and Information Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 5 ] [Zhao G.]School of Physics and Information Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 6 ] [Chen Q.]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

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 2

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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