Affiliation:
1. School of Engineering and Built Environment, Griffith University, Nathan, QLD 4111, Australia
Abstract
This paper reports on noise modeling of a piezoelectric charge accelerometer with a signal conditioning circuit. The charge output is converted into voltage and amplified using a JFET operational amplifier that has high input resistance and low noise. The noise sources in the whole system include electrical and mechanical thermal noises of the accelerometer, thermal noises of resistors, and voltage and current noises of the operational amplifier. Noise gain of each source is derived from small signal circuit analysis. It is found that the feedback resistor of the operational amplifier is a major source of noise in low frequencies, whereas electrical thermal noise of the accelerometer dominates the rest of spectrum. This method can be used to pair a highly sensitive sensor with a single JFET operational amplifier instead of a multi-stage signal conditioning circuit.
Reference22 articles.
1. Piezoelectric accelerometers for ultrahigh temperature application;Zhang;Appl. Phys. Lett.,2010
2. Han, R.-H., Wang, J.-Y., Xu, M.-H., and Guo, H. (2016, January 21–24). Design of a tri-axial micro piezoelectric accelerometer. Proceedings of the 2016 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA), Xi’an, China.
3. Performance analysis of commercial accelerometers: A parameter review;Elies;Sens. Transducers,2015
4. Wu, T., You, D., Gao, H., Lian, P., Ma, W., Zhou, X., Wang, C., Luo, J., Zhang, H., and Tan, H. (2023). Research Status and Development Trend of Piezoelectric Accelerometer. Crystals, 13.
5. System modeling of microaccelerometer using piezoelectric thin films;Yu;Sens. Actuators A Phys.,2001