Volume 31 Issue 1
Jan.  2022
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ZHANG Yanbo, LIU Shubin, LIANG Yuhua, ZHU Zhangming. A 2nd-Order Noise Shaping SAR ADC Realizing NTF Zero-Pole Optimization Based on IIR-FIR Filter[J]. Chinese Journal of Electronics, 2022, 31(1): 33-39. doi: 10.1049/cje.2020.00.309
Citation: ZHANG Yanbo, LIU Shubin, LIANG Yuhua, ZHU Zhangming. A 2nd-Order Noise Shaping SAR ADC Realizing NTF Zero-Pole Optimization Based on IIR-FIR Filter[J]. Chinese Journal of Electronics, 2022, 31(1): 33-39. doi: 10.1049/cje.2020.00.309

A 2nd-Order Noise Shaping SAR ADC Realizing NTF Zero-Pole Optimization Based on IIR-FIR Filter

doi: 10.1049/cje.2020.00.309
Funds:  This work was supported by the National Key Research and Development Project of China (2018YFB2202400) and the National Natural Science Foundation of China (U19A2053, 61625403, 61874174, 62074119, 62021004)
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  • Author Bio:

    received the B.S. and Ph.D. degrees in microelectronics from Xidian University, Xi’an, China, in 2016 and 2021, respectively. His research interests include high-resolution analog-to-digital converter and low power analog front-end circuits. (Email: zhybor@163.com)

    received the B.S. and Ph.D. degrees in microelectronics from Xidian University, Xi’an, China, in 2007 and 2014, respectively. He is currently a Professor with the School of Microelectronics, Xidian University. His research interests include CMOS data converters, analog-front end, and RF integrated circuits

    is currently an Associate Professor with the School of Microelectronics, Xidian University, Xi’an, China. His current interests include data converters, analog front-end circuits and circuit designing with emerging devices such as negative capacitance ferroelectric FETs, etc. He has authored and co-authored over 20 publications of journals and conference proceedings. Between 2017 and 2018, he was a Postdoctoral Researcher in the Department of Computer Science and Engineering, the Pennsylvania State University, University Park, PA, USA

    (corresponding author) received the B.S., M.S., and Ph.D. degrees in microelectronics from Xidian University, Xi’an, China, in 2000, 2003, and 2004, respectively. Since 2009, he has been a Professor with the School of Microelectronics, Xidian University. He has published more than 60 articles in the IEEE journals. His current research interests include analog, mixed-signal, and RF-integrated circuits and systems. He serves as an Associate Editor for the IEEE Transactions on Circuits and Systems—II: Express Briefs. (Email: zmyh@263.net)

  • Received Date: 2020-09-23
  • Accepted Date: 2021-07-18
  • Available Online: 2021-09-09
  • Publish Date: 2022-01-05
  • This paper reports a successive approximation register (SAR) analog-to-digital converters (ADCs) with the 2nd-order and optimized noise shaping (NS) scheme. Based on the feed-forward structure, both noise transfer function (NTF) zero and pole optimization have been achieved simultaneously utilizing a cascaded IIR-FIR (infinite impulse response and finite impulse response) filter. The analysis shows that the proposed structure provides a better NS efficiency than prior arts. The efficiency of the proposed NS scheme and the ADC performance are verified by simulation achieving a 14.2 effective number of bits with an 8-bit SAR ADC architecture at an over sampling rate of 8 sampled at 100 MS/s. Taking advantage of the NTF zero-pole optimization, a low resolution SAR ADC is allowed under the same quantization noise budget in this structure.
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