Oscillation type gyro sensor, control circuit, electronic...

Details Oscillation type gyro sensor, control circuit, electronic... Oscillation type gyro sensor, control circuit, electronic...

2011-08-23

2011-08-23

Kwok, Helen C. (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Angular rate using gyroscopic or coriolis effect

C073S504150

Reexamination Certificate

active

08001840

ABSTRACT:
There is provided an oscillation type gyro sensor including an oscillation gyro device, an oscillation circuit, a controller, and an impedance conversion circuit. The oscillation gyro device includes a piezoelectric device including a drive electrode and a detection electrode, oscillates according to a drive signal input to the drive electrode, and is capable of generating an output signal including a detection signal corresponding to a Coriolis force from the detection electrode. The oscillation circuit outputs, based on the output signal, a signal for oscillating the oscillation gyro device to the drive electrode as the drive signal. The controller controls the oscillation circuit such that the oscillation circuit outputs a drive signal that makes the output signal constant. To the impedance conversion circuit, the drive signal output from the oscillation circuit is input.

REFERENCES:
patent: 5675083 (1997-10-01), Nakamura
patent: 5794080 (1998-08-01), Watanabe et al.
patent: 5902931 (1999-05-01), Mori et al.
patent: 6564638 (2003-05-01), Ebara
patent: 2008/0282800 (2008-11-01), Kurihara
patent: 09-292231 (1997-11-01), None

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