期刊
MODERN PHYSICS LETTERS B
卷 31, 期 6, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217984917500646
关键词
Gyroscope; all temperature range; stability; interface circuit
资金
- National Basic Research Program of China [2012CB934104]
- National Natural Science Foundation of China [61204121]
- National Hi-Tech Research and Development Program of China (863 Program) [2013AA041107]
- Fundamental Research Funds for the Central Universities [HIT.NSRIF.2013040]
The all temperature range stability is the most important technology of MEMS angular velocity sensor according to the principle of capacity detecting. The correlation be tween driven force and zero-point of sensor is summarized according to the temperature characteristic of the air-damping and resonant frequency of sensor header. A constant trans-conductance high-linearity amplifier is designed to realize the low phase-drift and low amplitude-drift interface circuit at all-temperature range. The chip is fabricated in a standard 0.5 mu m CMOS process. Compensation achieved by driven force to zero-point drift caused by the stiffness of physical construction and air-damping is adopted. Moreover, the driven force can be obtained from the drive-circuit to avoid the complex sampling. The test result shows that the zero-point drift is lower than 30 degrees/h (1-sigma) at the temperature range from -40 degrees C to 60 degrees C after three-order compensation made by force.
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