A 1.8V 10bit 100Msps Pipelined Analog to Digital Converter  

一种1.8V 10位100Ms/s流水线模数转换器设计(英文)

作　　者：龙善丽[1] 时龙兴[1] 吴建辉[1] 王沛[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心,南京210096

出　　处：《Journal of Semiconductors》2008年第5期923-929,共7页半导体学报（英文版）

摘　　要：A novel low-voltage,low constant-impedance switch is proposed, which not only eliminates the parasitic capacitor but also reduces the variation of switch ＂on＂ resistance. With the gain-boost technology,the operational transconductance amplifier used in this analog-to-digital converter （ADC） achieves enough DC gain and unity-gain frequency under the low voltage supply and to guarantee the performance of the sample and hold circuit （S/H） and the sub-stages. Based on these methods,a 10bit 100Msps pipelined ADC is fabricated in a 0. 18μm CMOS process and operates under a 1.8V voltage supply. The ADC achieves an SNR of 54. 2dB （input frequency of 6.26MHz） and an SNR of 49. 8dB （input frequency of 48. 96MHz） when the sampling frequency is 100MHz.针对自举开关中的寄生效应和导通电阻的非线性问题提出了一种新的低压低电阻的自举开关.同时利用增益增强技术设计高直流增益和高单位增益带宽的运放,从而保证采样保持电路和子级电路的性能.基于以上技术,设计了一个10位100Ms/s流水线模数转换器,该模数转换器用0.18μm CMOS工艺流片验证.经测试,该模数转换器可以在采样率为100MHz,输入频率分别为在6.26和48.96MHz的情况下分别获得54.2和49.8dB的信噪比.

关 键 词：analog-to-digital converter bootstraooed switch GAIN-BOOSTING technioue 

分 类 号：TN792[电子电信—电路与系统]