A Feed-Forward Sigma-Delta Modulator Applied in Silicon Gyroscope

Qi Shao; Qiu Ye Lv; Hao Meng; Qiang Fu; Xiao Wei Liu

doi:10.4028/www.scientific.net/KEM.645-646.657

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 645-646A Feed-Forward Sigma-Delta Modulator Applied in...

A Feed-Forward Sigma-Delta Modulator Applied in Silicon Gyroscope

Abstract:

Aiming to be applied in silicon gyroscope, a three-order single loop feedforward modulator with three-bit quantizer and local feedback is designed in this paper. Signal band is 200 KHz, sampling rate is 25.6 MHz, OSR is 64. Ideal modulator is then designed and simulated in MATLAB, getting SNR 125dB. Non-ideal factors are also added to ideal model, DWA technology is adopted to restrain the nonlinearity of multi-bit quantizer, getting SNR 104dB. Finally, transistor-level full-difference modulator is designed and simulated in Cadence, fetting SNR 101.3dB.

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Periodical:

Key Engineering Materials (Volumes 645-646)

Pages:

657-661

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.645-646.657

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Online since:

May 2015

Authors:

Qi Shao*, Qiu Ye Lv, Hao Meng, Qiang Fu, Xiao Wei Liu

Keywords:

DWA, Micro-Gyroscope, Modulator, Sigma-Delta

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* - Corresponding Author

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