{"title":"针对高速 SAR ADC 的预采样改进型 kT/C 噪声消除技术","authors":"Yuanfan Gu, Kaipeng Wang, Tiange Yi, Xiaoguo Chen, Shiheng Yang, Jiaxin Liu","doi":"10.1049/ell2.13298","DOIUrl":null,"url":null,"abstract":"<p>The kT/C noise cancellation technique can effectively reduce the digital-to-analog converter (DAC) size for successive approximation register ADCs and thus relax the burden for input drivers and reference buffers. However, the prior kT/C noise cancellation technique suffers from a hard trade-off between the noise, amplifier bandwidth and linearity. Here, an improved kT/C noise cancellation technique is proposed to break the trade-off. It uses presampling to hold the input signal unchanged during the noise cancelling phase, leading to significantly relaxed requirements on the bandwidth and linearity of the amplifier. The proposed technique is verified in a 14-bit 200 MS/s SAR analog-to-digital converter (ADC) with a DAC size of 128 fF. Simulation results show that this work achieves 75.6 dB signal to noise and distortion ratio and consumes 1.56 mW power.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.13298","citationCount":"0","resultStr":"{\"title\":\"An improved kT/C noise cancellation technique with presampling for high-speed SAR ADCs\",\"authors\":\"Yuanfan Gu, Kaipeng Wang, Tiange Yi, Xiaoguo Chen, Shiheng Yang, Jiaxin Liu\",\"doi\":\"10.1049/ell2.13298\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The kT/C noise cancellation technique can effectively reduce the digital-to-analog converter (DAC) size for successive approximation register ADCs and thus relax the burden for input drivers and reference buffers. However, the prior kT/C noise cancellation technique suffers from a hard trade-off between the noise, amplifier bandwidth and linearity. Here, an improved kT/C noise cancellation technique is proposed to break the trade-off. It uses presampling to hold the input signal unchanged during the noise cancelling phase, leading to significantly relaxed requirements on the bandwidth and linearity of the amplifier. The proposed technique is verified in a 14-bit 200 MS/s SAR analog-to-digital converter (ADC) with a DAC size of 128 fF. Simulation results show that this work achieves 75.6 dB signal to noise and distortion ratio and consumes 1.56 mW power.</p>\",\"PeriodicalId\":11556,\"journal\":{\"name\":\"Electronics Letters\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2024-08-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.13298\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electronics Letters\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1049/ell2.13298\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electronics Letters","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1049/ell2.13298","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
An improved kT/C noise cancellation technique with presampling for high-speed SAR ADCs
The kT/C noise cancellation technique can effectively reduce the digital-to-analog converter (DAC) size for successive approximation register ADCs and thus relax the burden for input drivers and reference buffers. However, the prior kT/C noise cancellation technique suffers from a hard trade-off between the noise, amplifier bandwidth and linearity. Here, an improved kT/C noise cancellation technique is proposed to break the trade-off. It uses presampling to hold the input signal unchanged during the noise cancelling phase, leading to significantly relaxed requirements on the bandwidth and linearity of the amplifier. The proposed technique is verified in a 14-bit 200 MS/s SAR analog-to-digital converter (ADC) with a DAC size of 128 fF. Simulation results show that this work achieves 75.6 dB signal to noise and distortion ratio and consumes 1.56 mW power.
期刊介绍:
Electronics Letters is an internationally renowned peer-reviewed rapid-communication journal that publishes short original research papers every two weeks. Its broad and interdisciplinary scope covers the latest developments in all electronic engineering related fields including communication, biomedical, optical and device technologies. Electronics Letters also provides further insight into some of the latest developments through special features and interviews.
Scope
As a journal at the forefront of its field, Electronics Letters publishes papers covering all themes of electronic and electrical engineering. The major themes of the journal are listed below.
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MIMO