Paper Title:
Design of High-SNR CMOS Interface Circuit for Micro-Machined Gyroscope
  Abstract

A CMOS integrated interface circuit for micro-machined gyroscope containing a novel front-end and 6th-order Sigma-delta modulator is presented in this paper. To reduce the noise coming from the sensor and circuit, the front-end is accomplished by a switched-capacitor architecture, which constructed by a high-gain fully-differential amplifier and improved by chopper-stabilization technique, and work under a designed charging and sampling logic scheme. A cascade 6th-order Sigma-Delta modulator is designed to get high resolution, reduce quantized error and suppress the instability brought by high-order modulator. With the cascade structure and 16-bit resolution 32 OSR, the modulator outputs 3-bits digital stream. The whole circuit is designed with AMS technique and 3.3V power consumption. The simulation result presents that the interface circuit performs a appointed under a low-noise design specification in signal band, and the SNR of the circuit achieves remarkable value of 106dB.

  Info
Periodical
Edited by
Xiaohao Wang
Pages
508-512
DOI
10.4028/www.scientific.net/KEM.483.508
Citation
H. X. Lu, Y. P. Xu, S. R. Wang, "Design of High-SNR CMOS Interface Circuit for Micro-Machined Gyroscope", Key Engineering Materials, Vol. 483, pp. 508-512, 2011
Online since
June 2011
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$32.00
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