1. A Feed-Forward Sigma-Delta Modulator Applied in Silicon Gyroscope
- Author
-
Xiao Wei Liu, Qiang Fu, Hao Meng, Qi Shao, and Qiu Ye Lv
- Subjects
Engineering ,Ideal (set theory) ,Silicon ,business.industry ,Mechanical Engineering ,Feed forward ,chemistry.chemical_element ,Gyroscope ,Delta-sigma modulation ,law.invention ,Nonlinear system ,chemistry ,Mechanics of Materials ,law ,Control theory ,Electronic engineering ,General Materials Science ,MATLAB ,business ,Cadence ,computer ,computer.programming_language - 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.
- Published
- 2015