An Interface for a 300°/s Capacitive 2-Axis MicroGyroscope with Pseudo-CT Readout

📋 论文概要

论文设计了一种用于300°/s电容式2轴微陀螺的接口电路，采用伪连续时间读出架构，以缩短启动时间并减少芯片面积，避免传统模式匹配所需的额外DSP和缓慢的环路建立。

💡 主要创新点

• 提出伪连续时间（pseudo-CT）读出方案，实现二次传感路径的连续时间处理，无需额外DSP。
• 通过优化的接口电路设计，支持快速启动和低功耗，适用于低成本电容式微陀螺。

🏷 关键词

📄 原文摘要

The widespread use of capacitive MEMS vibratory gyroscopes is powerfully driven by low cost [1]; this is partly determined by factors such as die area and the number of necessary external components. Important properties of gyroscopes also include a short start-up time, and resolution that has been recently improved by applying the mode-matching technique [2,3]. However, the electromechanical feedback loop for active-mode matching requires additional DSP and chip area, and involves an additional slowly settling loop during the sensor startup. The pseudo-continuous-time (CT) secondary (sense) readout technique introduced in this paper is applied to the open-loop secondary readout of a gyroscope operating in the low-pass region. The technique alleviates the issues related to complexity and area as well as to the large time constants of the CT readout [4,5] without compromising noise performance or

👥 作者与机构

Lasse Aaltonen1, Timo Speeti1, Mikko Saukoski1,2, Kari Halonen1, 1

Helsinki University of Technology, Espoo, Finland ELMOS Semiconductor, Dortmund, Germany