A 250mV 7.5µW 61dB SNDR CMOS SC ΔΣ Modulator Using a Near-Threshold-Voltage-Biased CMOS Inverter Technique

📋 论文概要

该论文提出了一种采用近阈值电压偏置CMOS反相器技术的开关电容ΔΣ调制器，在250mV超低电源电压下实现了7.5µW功耗和61dB SNDR，解决了低电压下模拟电路性能下降的问题，适用于无线功率传输和医疗便携系统。

💡 主要创新点

• 提出近阈值电压偏置的CMOS反相器技术，使反相器在极低电压下仍能有效工作，作为运算放大器替代方案。
• 实现了250mV电源电压下61dB SNDR的ΔΣ调制器，功耗仅7.5µW，达到极低电压与低功耗的平衡。

🏷 关键词

📄 原文摘要

One of the most continuous trends in solid-state circuits is the decrease in power supply as a direct consequence of technology scaling. The fact that Vt does not scale linearly with supply voltage has encouraged several low-voltage design techniques recently [1-6]. The received voltage level in a wireless power transfer system decays rapidly with distance and also medical portable systems are calling for low-voltage circuitries. Major milestones in low-voltage ΔΣ converters include a 0.5V CT ΔΣ converter

👥 作者与机构

Fridolin Michel, Michiel Steyaert

KU Leuven, Leuven, Belgium