Semiconductor Optoelectronics, Volume. 41, Issue 3, 443(2020)
Research on Frequency Tracking Circuit of Multi-ring Resonant Micromachined Gyro
Due to the high resonance frequency of the multi-ring resonant micro-mechanical gyro, the traditional digital control circuit can not accurately balance the accuracy and tracking speed of the gyro amplitude signal. Based on the traditional hemispherical gyro digital control loop, a frequency tracking circuit is proposed for multi-ring resonant micro-mechanical gyroscopes, and it is applied to multi-ring resonant micro-mechanical gyros for the first time. The circuit is based on a high-speed A/D conversion circuit. The frequency and phase information is calculated by high-speed sampling of the amplitude signal, and the output signal is generated by the CORDIC algorithm. Test results show that the circuit makes the frequency tracking accuracy of the multi-ring resonant micro-mechanical gyro amplitude signal reach 0.78Hz, and the frequency tracking time is less than 40μs, which greatly improves the performance of the control circuit.
Get Citation
Copy Citation Text
XUE Bing, ZHANG Weiping, WANG Zijie, TIAN Mengya, GU Liutao. Research on Frequency Tracking Circuit of Multi-ring Resonant Micromachined Gyro[J]. Semiconductor Optoelectronics, 2020, 41(3): 443
Category:
Received: Nov. 11, 2019
Accepted: --
Published Online: Jun. 18, 2020
The Author Email: Weiping ZHANG (zwp37@163.com)