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《Microelectronics》 2016-01
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A 10-Bit 80Ms/s Successive-Approximation Analog-to-Digital Converter

CHEN Xiaer;HU Gangyi;ZHANG Yong;NI Yabo;FAN Yuxiao;Chongqing University of Posts and Telecommunications;Science and Technology on Analog Integrated Circuit Laboratory;  
Based on 65 nm CMOS process,a 10-bit 80 Ms/s successive-approximation A/D converter was proposed.The power supply was 1.2 V.A full differential input,splitting monotonic switching method was adopted.Splitting monotonic switching method could reduce the switching power,the settling time of capacitors and the complexity of the SAR logic efficiently,thus the speed of the ADC was increased.In the meantime,the proposed method had eliminated the degradation of linearity caused by the large dropout of the common-mode voltage.The use of dynamic comparator could also reduce the power consumption of the converter.Results from Spectre simulation showed that the A/D converter had a SFDR of 72 dBc at the sampling frequency of 80 MHz and the input signal frequency of 40 MHz.
【Fund】: 中国电子科技集团青年创新基金资助项目(JJ_QN_2013_30)
【CateGory Index】: TN792
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