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《Journal of Shanghai Jiaotong University》 2013-01
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Dither Circuit to Improve Performance for a Radiation Hardening by Design Pipeline Analog to Digital Converter

YU Jin-shan1,2,LIANG Sheng-ming2,MA Zhuo1,WANG Yu-xin2 ZHANG Rui-tao2,LIU Tao2,LI Ting2,YU Zhou2(1.College of Computer,National University of Defense Technology,Changsha 410073,China; 2.No.24 Research Institute of China Electronic Technology Group Corporation,Laboratory of Analog Integrated Circuit,Chongqing 400060,China)  
A subtractive dither technology to improve performance for a high-resolution radiation hardening by design pipeline analog-to-digital converter was proposed.The dither signal generation is based on a deep multi-bits pseudo-random number generator driving a 5-bit high-resolution digital to analogue conversion(DAC).This dither signal is added with analog to digital converter(ADC) input signal,sampled,quantized and then digitally subtracted from the ADC output,thereby causing no significant degradation signal noise ratio(SNR).The measured results show that the proposed dither technology can efficiently improve static and dynamic performance of the ADC,especially when the ADC quantizes a small-signal input.
【Fund】: 国家自然科学基金(60906009 61176030 61076025 60970036);; 模拟集成电路实验室基金(9140C0901110903);; 核高基重大专项(2009ZX01028-002-002);; 信息保障技术重点实验室基金(KJ-11-04)资助
【CateGory Index】: TN792
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