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

页码：1 / 10

页数：10

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