Measuring and testing – Speed – velocity – or acceleration – Angular rate using gyroscopic or coriolis effect
Reexamination Certificate
2005-09-28
2010-02-23
Kwok, Helen C. (Department: 2856)
Measuring and testing
Speed, velocity, or acceleration
Angular rate using gyroscopic or coriolis effect
C073S504140
Reexamination Certificate
active
07665360
ABSTRACT:
Vibration gyro circuitry, a vibration gyro unit, and a method for detecting a vibration gyro output, which enable detection of a rotational angular velocity with high sensitivity, are provided. The circuitry and the unit includes a differential amplifier circuit (4) for outputting a signal Vda corresponding to a difference (Vgl−Vgr) between output signals of two detection pieces of a vibration gyro (31), a synchronous detection circuit (5) for synchronously detecting the output signal Vda of the differential amplifier circuit (4), and a phase shift circuit for supplying to the synchronous detection circuit (5) a signal, as a timing signal Vck for the synchronous detection, which is phase-shifted with respect to a drive signal (an output signal of an adding circuit1) Vsa supplied to the vibration gyro (31). The phase difference θps between the drive signal Vsa and the timing signal Vck is set on the basis of a phase difference characteristic of a detection sensitivity S for the output signal Vda of the differential amplifier circuit (4), which is obtained in advance under a condition where a rotational angular velocity is applied to the vibration gyro (31) in a driving state.
REFERENCES:
patent: 5473288 (1995-12-01), Kumada
patent: 5854428 (1998-12-01), Okaguchi
patent: 6016698 (2000-01-01), Kasanami et al.
patent: 6151964 (2000-11-01), Nakajima
patent: 6450030 (2002-09-01), Fujimoto
patent: 6608425 (2003-08-01), Ebara et al.
patent: 6805007 (2004-10-01), Fell et al.
patent: 7107841 (2006-09-01), Mori
patent: 7292021 (2007-11-01), Tsuruhara et al.
patent: 7296467 (2007-11-01), Kawamura et al.
patent: 04-106410 (1992-04-01), None
patent: 07-218269 (1995-08-01), None
patent: 08-178670 (1996-07-01), None
patent: 09-318362 (1997-12-01), None
patent: 2000-283767 (2000-10-01), None
patent: 2002-228153 (2002-08-01), None
patent: 2002-228453 (2002-08-01), None
International Search Report dated Dec. 13, 2005.
Japanese Office Action issued on Nov. 4, 2009 in connection with JP Application No. 2004-295983.
Kwok Helen C.
Sonnenschein Nath & Rosenthal LLP
Sony Corporation
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