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JSSC 2012第11期Data Converters40 nm CMOSPipeline ADCOp-Amp

An 11-b 300-MSs Double-Sampling Pipelined ADC With On-Chip Digital Calibration f

提出一种带片上数字校准的双采样流水线ADC,消除记忆效应误差,工作速度超过300 MHz。
11位精度,300 MS/s,40 mW功耗,FoM 0.24 pJ/conversion-step
流水线ADC双采样数字校准记忆效应高速ADC
创新点1:双采样流水线ADC架构(方法创新) - 通过共享运算放大器在两个流水线ADC通道之间实现双采样,显著提高了采样速率至300 MS/s,同时减少了硬件复杂度。
创新点2:片上数字校准技术(系统创新) - 提出了一种前景数字校准技术,有效消除了残存电荷的记忆效应误差,无需额外的模拟电路,简化了设计并提高了可靠性。
创新点3:无额外模拟电路的记忆效应消除(电路创新) - 在数字域中实现记忆效应校准,避免了传统模拟校准电路的复杂性和功耗,使ADC在40 nm CMOS工艺下实现0.24-pJ/conversion-step的优异能效比。
创新点4:高速低功耗性能(性能创新) - 在1.8 V电源电压下仅消耗40 mW功耗,支持300 MHz以上的工作频率,同时芯片面积仅为0.42 mm²,展现了高集成度和低功耗的优势。
Abstract
An 11-b 300-MS/s double sampling pipelined ADC with on-chip digital calibration f or memory effects is presented. In double-sampling pipelined ADC architecture, memory effect of residual charge occurs due to sharing an op-amp between two channels of pipelined ADC. The proposed foreground calibration technique removes the memory effect error in digital domain without additional analog circuit. Thus, the technique simpli- fies the analog circuits, which ext ends the operation speed over 300 MHz. Th