The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 2010
Filed:
Sep. 28, 2005
Kazuo Kurihara, Saitama, JP;
Kazuo Kurihara, Saitama, JP;
Sony Corporation, Tokyo, JP;
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 () for outputting a signal Vda corresponding to a difference (Vgl−Vgr) between output signals of two detection pieces of a vibration gyro (), a synchronous detection circuit () for synchronously detecting the output signal Vda of the differential amplifier circuit (), and a phase shift circuit for supplying to the synchronous detection circuit () 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 circuit) Vsa supplied to the vibration gyro (). 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 (), which is obtained in advance under a condition where a rotational angular velocity is applied to the vibration gyro () in a driving state.