A 1.1-nJ/Conversion RC-Discharge-Based Resistance Sensor With ±0.65% (3σ) 1 -Point Trimmed Inaccuracy in 0.18-μm CMOS Technology

IF 2 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

IEEE Solid-State Circuits Letters Pub Date : 2026-01-01 Epub Date: 2026-03-25 DOI:10.1109/LSSC.2026.3677301

Mu Wu;Yihang Cheng;Xingli Cui;Sining Pan;Huaqiang Wu

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引用次数: 0

Abstract

This letter presents an energy-efficient RC discharge-based sensor readout circuit for sub-kilo-ohm resistance measurements. An SAR logic is implemented to adjust the DAC capacitor array to equalize the RC time constants of the resistance-sensing and DAC branches, thereby eliminating the high static current required to bias the small sensing resistor. To further reduce power consumption, the sensing branch with a large discharging capacitor is triggered only once per conversion. Fabricated in a standard 0.18-

$\mu $

m CMOS technology, the sensor achieves a competitive energy efficiency of 1.1 nJ/conversion and a fast conversion time of

$2.4~\mu $

s. With the auto-zeroing (AZ) technique, it achieves a

$3\sigma $

inaccuracy of ±0.65% after 1-point calibration over a resistance range from 150 to

$250~\Omega $

查看原文本刊更多论文

基于0.18 μm CMOS技术的1.1 nj /转换rc放电电阻传感器，误差为±0.65% (3σ) 1点

本文介绍了一种用于亚千欧姆电阻测量的节能RC放电传感器读出电路。采用SAR逻辑来调整DAC电容阵列，以平衡电阻感测和DAC支路的RC时间常数，从而消除小感测电阻偏置所需的高静态电流。为了进一步降低功耗，具有大放电电容的传感支路每次转换仅触发一次。该传感器采用标准的0.18- $\mu $ m CMOS技术制造，具有竞争力的能量效率为1.1 nJ/转换，转换时间为$2.4~\mu $ s。通过自动调零（AZ）技术，其$3\sigma $误差为±0.65% after 1-point calibration over a resistance range from 150 to $250~\Omega $ .

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Solid-State Circuits Letters Engineering-Electrical and Electronic Engineering

CiteScore

4.30

自引率

3.70%

发文量