Linearity Boosting Technique with Adaptive Sampling Switch Assisted by Signal Prediction for Multi-Channel ADCs in Standard CMOS Process

  • Zihao Jiao
  • , Xiaofei Wang
  • , Hongrui Luo
  • , Jie Zhang
  • , Ruizhi Zhang
  • , Hong Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

A linearity boosting technique that samples the signal with adaptive sampling switch assisted by signal prediction is presented in this work for multi-channel ADCs. The linearity and accuracy are effectively improved when the number of on switches is dynamically adjusted according to the result of first-order signal prediction based on the ADC's digital output. A compact model is built to optimize the grouping scheme of the sampling switches. By dividing the sampling switch into 16 elements, the spurious-free dynamic range (SFDR) and signal-to-noise-and-distortion ratio (SNDR) are improved by 13 and 4.9 dB, respectively, for a 12-bit, 50-MSPS ADC in 65-nm CMOS process. The proposed linearity boosting technique can be realized in standard CMOS process without using bootstrapped switch or dynamic substrate bias technique, therefore it is very suitable for low-cost systems, especially for multi-channel applications.

Original languageEnglish
Title of host publication2021 IEEE Nordic Circuits and Systems Conference, NORCAS 2021 - Proceedings
EditorsJari Nurmi, Dag T. Wisland, Snorre Aunet, Kristian Kjelgaard
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665407120
DOIs
StatePublished - 2021
Event7th IEEE Nordic Circuits and Systems Conference, NORCAS 2021 - Virtual, Oslo, Norway
Duration: 26 Oct 202127 Oct 2021

Publication series

Name2021 IEEE Nordic Circuits and Systems Conference, NORCAS 2021 - Proceedings

Conference

Conference7th IEEE Nordic Circuits and Systems Conference, NORCAS 2021
Country/TerritoryNorway
CityVirtual, Oslo
Period26/10/2127/10/21

Keywords

  • Linearity boosting
  • Multi-channel ADCs
  • SFDR
  • Signal prediction
  • Transmission gate

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