A 3-Axis Open-Loop Gyroscope with Demodulation Phase Error Correction

📋 论文概要

本文提出了一种三轴开环陀螺仪，通过解调相位误差校正技术降低偏移漂移，以满足消费电子领域对低噪声、低功耗和低成本的需求。该设计摒弃了传统闭环架构，采用开环方案并重点优化偏移稳定性。

💡 主要创新点

• 采用开环架构替代传统闭环设计，降低功耗和成本，同时通过解调相位误差校正技术补偿相位不匹配引起的偏移漂移。
• 实现三轴集成，在紧凑封装内同时测量三个轴的角速度，适用于智能手机和游戏控制器等消费电子应用。
• 针对always-on应用场景，优化了噪声和偏移漂移性能，满足低功耗连续运行要求。

🏷 关键词

📄 原文摘要

in high-volume applications, largely due to intuitive user interfaces in smart phones and video game controllers. For their continued expansion into more demanding CE applications, a further reduction of their noise, offset drift, and power dissipation, especially in the emerging always-on category, is mandatory. To be viable, solutions to these conflicting requirements must overcome the challenges of low cost and ever-shrinking package size. This paper describes one such solution with special emphasis on offset drift reduction. The system presented here discards the standard practice of electrically cancelling the quadrature error, and instead combines information derived from continuously monitoring the quadrature error together with a single-point temperature

👥 作者与机构

Chinwuba D. Ezekwe1, Wolfram Geiger2, Torsten Ohms3

Robert Bosch, Palo Alto, CA, Robert Bosch, Reutlingen, Germany, 3Bosch Sensortec, Reutlingen, Germany 1 2 Consumer-electronic (CE) gyroscopes have recently enjoyed broad deployment