Microgyroscope control system using a high-order band-pass continuous-time sigma-delta modulator

被引：24
|
作者：
Dong, Y. [1 ]
Kraft, M. [1 ]
Hedenstierna, N. [2 ]
Redman-White, W. [1 ]
机构：
[1] Univ Southampton, Sch Elect & Comp Sci, Southampton SO17 1BJ, Hants, England
[2] Infineon Technol SensoNor AS, Horten, Norway
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2008年 / 145卷 / 299-305期
基金：
英国工程与自然科学研究理事会;
关键词：
band-pass; closed loop control; gyroscope; MEMS; sigma-delta;
D O I：
10.1016/j.sna.2007.10.057
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The paper presents a novel 6th order continuous-time, force-feedback band-pass sigma-delta modulator control system for the detection mode of micromachined vibratory gyroscopes. Compared with the architecture using a low-pass sigma-delta modulator, this band-pass solution uses a much lower sampling frequency for the sigma-delta modulator and thus reduces the requirement for frequency response of the detection interface and control electronics. In this work, the sigma-delta modulator operates at only four times of mechanical resonant frequency, which allowed its implementation in a continuous-time circuit using discrete electronic components on a PCB; this has the advantage of simple prototyping and can improve the signal anti-aliasing characteristics. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：299 / 305
页数：7
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