Title:
振動ジャイロ用回路、振動ジャイロユニット、振動ジャイロの出力検出方法
Document Type and Number:
Japanese Patent JP4543866
Kind Code:
B2
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 circuit 1) Vsa supplied to the vibration gyro (31). The phase difference ¸ps 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.
Inventors:
Kurihara Kazuo
Application Number:
JP2004295983A
Publication Date:
September 15, 2010
Filing Date:
October 08, 2004
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G01C19/56; G01C19/5649
Domestic Patent References:
| JP7218269A | ||||
| JP4106410A | ||||
| JP9318362A | ||||
| JP8178670A | ||||
| JP2002228453A |
Attorney, Agent or Firm:
Junichi Omori
Ori Akira
Yasuo Iisaka
Ori Akira
Yasuo Iisaka