← 返回 JSSC 论文列表JSSC 2023第4期Data Converters65nmSAR ADC
A 65-dB-SNDR Pipelined SAR ADC Using PVT-Robust Capacitively Degenerated Dynamic
提出一种PVT鲁棒的电容退化动态放大器,用于低功耗流水线SAR ADC,实现65dB SNDR和79.8dB SFDR。
65nm CMOS, 0.8-1.0V, 50MS/s, 65dB SNDR, 79.8dB SFDR, 0.46mW
PVT鲁棒电容退化动态放大器流水线SAR ADC低功耗时序发生器
▸创新点1:采用PVT鲁棒的电容退化动态放大器作为残差放大器,通过优化电容退化结构显著提升温度稳定性,在0°C-100°C范围内SNDR仅变化1.86dB(电路创新)
▸创新点2:提出两阶段动态放大器架构,在保持高线性度和宽输出摆幅的同时实现16倍电压增益,解决了传统动态放大器增益不足的问题(架构创新)
▸创新点3:集成低功耗片上时序发生器,仅消耗总功耗的10%,有效控制放大器工作时序并降低系统整体功耗(系统级创新)
▸创新点4:在65nm CMOS工艺下实现0.46mW超低功耗,同时达到65dB SNDR和79.8dB SFDR的高性能指标,展现卓越的能效比(性能创新)
Abstract
This article presents a process, voltage, and temper-
ature (PVT)-robust capacitively degenerated dynamic amplifier
as the residue amplifier of the low-power pipelined successive-
approximation-register (SAR) analog-to-digital converter (ADC).
The proposed dynamic amplifier achieves a voltage gain of
16 with a two-stage configuration and high linearity over a
wide temperature range with an on-chip timing generator. This
work solves problems related to the low voltage gain and high
temperature–sensit