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[1] Zhou Wei, Cai Tijing,. Analysis and design of sigma-delta interface circuitfor quartz flexural pendulum accelerometer [J]. Journal of Southeast University (English Edition), 2011, 27 (3): 266-269. [doi:10.3969/j.issn.1003-7985.2011.03.008]
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Analysis and design of sigma-delta interface circuitfor quartz flexural pendulum accelerometer()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
27
Issue:
2011 3
Page:
266-269
Research Field:
Other Disciplines
Publishing date:
2011-09-30

Info

Title:
Analysis and design of sigma-delta interface circuitfor quartz flexural pendulum accelerometer
Author(s):
Zhou Wei Cai Tijing
School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Keywords:
switched-capacitor(SC)circuit sigma-delta modulator(SDM) high resolution non-ideality low power
PACS:
V411;U666.1
DOI:
10.3969/j.issn.1003-7985.2011.03.008
Abstract:
For the high resolution required in a digital interface circuit of an accelerometer used in feeble gravity measurement, a switched-capacitor(SC)sigma-delta modulator(SDM)is proposed. Based on the principle and the topology structure of the SDMs, the influence of oversampling ratio, bits of an internal quantizer and the cascaded structure on weak signal detecting precision is analyzed, and an ideal low-distortion SDM with a second-order 1-bit structure satisfying the high-resolution interface circuit of an accelerometer is designed. With the research on non-idealities of each SDM block in the SC circuit implementation and their impacts on power consumption, the realized parameters of low-power SDMs based on different bandwidths are devised and the power consumption of each SDM is estimated. Time-domain behavioral simulation is explored based on Simulink. The results demonstrate that a 21-bit resolution of the designed SDMs can be achieved on the premise of low power, and the parameters for the circuit implementation can be directed to the transistor-level circuit design.

References:

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Memo

Memo:
Biographies: Zhou Wei(1984—), female, graduate; Cai Tijing(corresponding author), male, doctor, professor, caitij@seu.edu.cn.
Foundation item: The National High Technology Research and Development Program of China(863 Program)(No.2006AA12Z302).
Citation: Zhou Wei, Cai Tijing. Analysis and design of sigma-delta interface circuit for quartz flexural pendulum accelerometer[J].Journal of Southeast University(English Edition), 2011, 27(3):266-269.[doi:10.3969/j.issn.1003-7985.2011.03.008]
Last Update: 2011-09-20