Title:
FREQUENCY MISMATCH DETECTION METHOD FOR MODE MATCHING IN GYROSCOPES
Document Type and Number:
Japanese Patent JP2019045492
Kind Code:
A
Abstract:
To provide a method for detecting frequency mismatch between a drive signal and a sense signal in microelectromechanical system gyroscopes.SOLUTION: An output signal is generated whose spectrum reflects physical characteristics of a gyroscope 100, and the output signal is used to determine the frequency fof a sense signal. The output signal is generated by cross-correlating a random or pseudo-random noise signal with a response signal, where the response signal is obtained by allowing the noise signal to pass through a system designed to have a noise transfer function that mimics the frequency response of the gyroscope. Since the noise signal is random or pseudo-random, cross-correlating the noise signal with the response signal reveals spectral characteristics of the gyroscope. To improve computational efficiency, the cross-correlation is performed on demodulated versions of the noise signal and the response signal.SELECTED DRAWING: Figure 1A
Inventors:
YAN JIEFENG
RONALD A KAPUSTA JR
CHEN JIANRONG
RONALD A KAPUSTA JR
CHEN JIANRONG
Application Number:
JP2018156112A
Publication Date:
March 22, 2019
Filing Date:
August 23, 2018
Export Citation:
Assignee:
ANALOG DEVICES INC
International Classes:
G01C19/5726; B81B3/00; H01L29/84
Domestic Patent References:
| JP2009162778A | 2009-07-23 | |||
| JP2005519296A | 2005-06-30 | |||
| JP2015525872A | 2015-09-07 |
Foreign References:
| US20180128674A1 | 2018-05-10 | |||
| DE10248735A1 | 2004-05-06 |
Attorney, Agent or Firm:
Yasuhiko Murayama
Shinya Mitsuhiro
Tatsuhiko Abe
Shinya Mitsuhiro
Tatsuhiko Abe