A 0.85V 600nW All-CMOS Temperature Sensor with an Inaccuracy of ±0.4°C (3σ) from -40 to 125°C

📋 论文概要

该论文提出了一种全CMOS温度传感器，采用动态阈值MOS晶体管（DTMOST）作为感温元件，结合逆变器-based二阶zoom ADC实现低功耗高精度读取，适用于RFID应用。在0.85V供电下功耗仅600nW，并在-40至125°C范围内达到±0.4°C（3σ）的精度。

💡 主要创新点

• 使用动态阈值MOS晶体管（DTMOST）作为温度传感器件，实现了亚1V的低电压操作。
• 采用逆变器-based二阶zoom ADC，结合动态误差校正技术，在低功耗下实现高精度温度读数。

🏷 关键词

📄 原文摘要

Yonsei University, Seoul, Korea, 3 NXP Semiconductors, Eindhoven, The Netherlands 1 2 This paper describes an all-CMOS temperature sensor intended for RFID applications that achieves both sub-1V operation and high accuracy (±0.4°C) over a wide temperature range (-40 to 125°C). It is also an ultra-low-power design: drawing 700nA from a 0.85V supply. This is achieved by the use of dynamic threshold MOSTs (DTMOSTs) as temperature-sensing devices, which are then read out by an inverter-based 2nd-order zoom ADC. Circuit errors are mitigated by the use of dynamic error-correction techniques, while DTMOST spread is reduced by a single room temperature (RT) trim. The latter feature constitutes a significant advance over previous all-CMOS designs [5,6], which require two-point trimming to approach the same level of accuracy. In most CMOS processes, a diode-connected DTMOST can be readily realized by

👥 作者与机构

Kamran Souri1, Youngcheol Chae2, Frank Thus3, Kofi Makinwa1

Delft University of Technology, Delft, The Netherlands,