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JSSC 2009第4期Data Converters90nmPipeline ADCOp-Amp

A 94-bit 50-MSs 144-mW Pipelined ADC Using Dynamic Source Follower Residue Ampli

提出一种采用动态源跟随器放大器的新型低功耗流水线ADC
9.4-bit 50-MS/s 1.44mW 119fJ/step
流水线ADC动态放大器偏移校准源跟随器开关电容电路
▸动态源跟随器架构替代传统运放MDAC电路
▸无大偏置电流的动态负载电容充电技术
▸集成偏移校准的低功耗比较器
Abstract
ann , Member , IEEE Abstract—A low-power pipelined ADC featuring dynamic source follower amplifiers is presented in this paper. The proposed dynamic source follower-based architecture provides a low-power alternative to the traditional opamp-based MDAC circuits. This new type of circuit dynamically charges its load capacitance without a large bias current, leading to significant power sav- ings. The presented ADC includes a low-power comparator with offset calibration and uses digital calibration