MEMS gyroscope control system using a band-pass continuous-time sigma-delta modulator

被引：11
|
作者：
Ding HaiTao [1 ,2 ,3 ]
Yang ZhenChuan [1 ]
Wang ZhanFei [3 ]
Kraft, Michael
Yan GuiZhen [1 ]
机构：
[1] Peking Univ, Inst Microelect, Natl Key Lab Sci & Technol Micro Nano Fabricat, Beijing 100871, Peoples R China
[2] Univ Southampton, Sch Elect & Comp Sci, Southampton SO17 1BJ, Hants, England
[3] North China Inst Syst Engn, Beijing 100089, Peoples R China
来源：
SCIENCE CHINA-INFORMATION SCIENCES | 2013年 / 56卷 / 10期
关键词：
band-pass; continuous-time; control system; MEMS gyroscope; sigma-delta modulator; INTERFACE;
D O I：
10.1007/s11432-012-4670-z
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper presents a MEMS gyroscope control system of using a high-order band-pass continuous-time sigma-delta modulator. Compared with a low-pass discrete-time sigma-delta modulator based solution, the band-pass modulator can considerably decrease the sampling frequency; moreover, the continuous-time architecture has an obvious advantage on PCB prototyping and shorter lead time of the implementation in hardware. System level simulations using MATLAB/Simulink show the proposed sixth order sigma-delta modulator can achieve a high SNR of 100 dB for an angular rate input with an amplitude of 200 degrees/s and a frequency of 32 Hz. A PCB circuit implementation is simulated using Orcad/PSpice to analyze the stability, and implemented in hardware. Measurement of the power spectral density of the output bitstream reveals a noise floor of -90 dBV/Hz(1/2). The prototype is tested on a rate table with an angular rate input, verifying that the principle of the approach of using an electro-mechanical band-pass sigma-delta modulator control system for a MEMS gyroscope.
引用
收藏
页码：1 / 10
页数：10
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