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

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外文摘要：This paper reports a successive approx-imation 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 re-sponse)filter.The analysis shows that the proposed struc-ture provides a better NS efficiency than prior arts.The efficiency of the proposed NS scheme and the ADC per-formance are verified by simulation achieving a 14.2 ef-fective number of bits with an 8-bit SAR ADC architec-ture 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.

外文关键词：

Analog-to-digital converters(ADCs)Feed-forwardZero-pole optimizationNoise shapingOversampling ADCSuccessive approximation register

作者：

ZHANG Yanbo、LIU Shubin、LIANG Yuhua、ZHU Zhangming

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作者单位：

School of Microelectronics,Xidian University,Xi'an 710071,China

基金：

National Key Research and Development Project of China国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金

项目编号：

2018YFB2202400U19A205361625403618741746207411962021004

出版年：

2022

DOI：

10.1049/cje.2020.00.309

电子学报(英文)

CSTPCDSCIEI

ISSN：1022-4653

年,卷(期)：2022.31(1)

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