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

Microgyroscope control system using a high-order band-pass continuous-time sigma-delta modulator
Microgyroscope control system using a high-order band-pass continuous-time sigma-delta modulator
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.
0924-4247
299-305
Dong, Y.
04add285-7898-4fe7-8984-a670bd5af14a
Kraft, M.
54927621-738f-4d40-af56-a027f686b59f
Hedenstierna, N.
a274beb9-a499-484b-8202-a1c7c0d1e837
Redman-White, W.
d5376167-c925-460f-8e9c-13bffda8e0bf
Dong, Y.
04add285-7898-4fe7-8984-a670bd5af14a
Kraft, M.
54927621-738f-4d40-af56-a027f686b59f
Hedenstierna, N.
a274beb9-a499-484b-8202-a1c7c0d1e837
Redman-White, W.
d5376167-c925-460f-8e9c-13bffda8e0bf

Dong, Y., Kraft, M., Hedenstierna, N. and Redman-White, W. (2008) Microgyroscope control system using a high-order band-pass continuous-time sigma-delta modulator. Sensors and Actuators A: Physical, 145-146, 299-305. (doi:10.1016/j.sna.2007.10.057).

Record type: Article

Abstract

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.

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More information

e-pub ahead of print date: 27 October 2007
Published date: July 2008
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 269363
URI: http://eprints.soton.ac.uk/id/eprint/269363
ISSN: 0924-4247
PURE UUID: 4116ecd1-7a80-4d22-baeb-c7fa63c32cf9

Catalogue record

Date deposited: 21 Apr 2010 07:46
Last modified: 14 Mar 2024 09:16

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Contributors

Author: Y. Dong
Author: M. Kraft
Author: N. Hedenstierna
Author: W. Redman-White

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