Angular velocity detection circuit and angular velocity detection apparatus
First Claim
1. An angular velocity detection circuit that is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity, the circuit comprising:
- a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration of the resonator and extracts the self-vibration component from the detection signal;
a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and
an offset addition unit that adds an offset value to an output signal of the direct-current conversion unit.
2 Assignments
0 Petitions
Accused Products
Abstract
An angular velocity detection circuit is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity. The angular velocity detection circuit includes: a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration of the resonator and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and an offset addition unit that adds an offset value to an output signal of the direct-current conversion unit.
19 Citations
8 Claims
-
1. An angular velocity detection circuit that is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity, the circuit comprising:
-
a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration of the resonator and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and an offset addition unit that adds an offset value to an output signal of the direct-current conversion unit. - View Dependent Claims (2, 5, 6)
-
-
3. An angular velocity detection circuit that is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity, the angular velocity detection circuit comprising:
-
a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration of the resonator and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and an offset input unit that adds an offset value to an output signal of the self-vibration component extraction unit. - View Dependent Claims (4)
-
-
7. An angular velocity detection apparatus, comprising:
-
a resonator, wherein the resonator makes excited vibration on the basis of a drive signal, obtains a Coriolis force caused by a rotation movement and the excited vibration, and outputs a detection signal including an angular velocity component based on the Coriolis force and a self-vibration component based on the excited vibration; and an angular velocity detection circuit that is connected to the resonator and detects an angular velocity, the angular velocity detection circuit including; a self-vibration component extraction unit that receives the detection signal and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and an offset addition unit that adds an offset value to an output signal of the direct-current conversion unit.
-
-
8. An angular velocity detection apparatus, comprising:
-
a resonator wherein the resonator makes excited vibration on the basis of a drive signal, obtains a Coriolis force caused by a rotation movement and the excited vibration, and outputs a detection signal including an angular velocity component based on the Coriolis force and a self-vibration component based on the excited vibration; and an angular velocity detection circuit that is connected to the resonator and detects an angular velocity, the angular velocity detection circuit including; a self-vibration component extraction unit that receives the detection signal and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and an offset input unit that adds an offset value to an output signal of the self-vibration component extraction unit.
-
Specification