Gyro sensor of an electrostatic driving and capacitance detecting type
First Claim
1. A gyro sensor, comprising:
- a vibrator which is possible to be vibrated in self-excitation;
outputs a first detecting signal indicating an oscillating amplitude and an oscillating frequency in the vibration of the vibrator when the vibrator is set in a condition of self-excitation, and outputs a second detecting signal indicating a yaw added to the vibrator;
a driving circuit which generates a first voltage, generates a control signal from the first detecting signal outputted from the vibrator, boosts the first voltage to a second voltage in response to the control signal to generate a driving signal set at both the second voltage and a driving frequency from the control signal, and transmits the driving signal to the vibrator to continue self-excitation of the vibrator in response to the driving signal; and
a yaw detecting circuit which generates a sensor signal corresponding to the yaw from the second detecting signal of the self-excited vibrator and outputs the sensor signal,wherein the sensor further comprises a starting circuit which supplies a start signal of a start frequency to the driving circuit and causes the driving circuit to generate an oscillation encouraging signal in response to the start signal by boosting the first voltage to a voltage of the oscillation encouraging signal such that the self-excitation of the vibrator is started in response to the oscillation encouraging signal.
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Accused Products
Abstract
A gyro sensor having a vibrator and a start circuit generates an oscillation encouraging signal by boosting a first voltage to a voltage of the signal in response to a start signal of a start frequency sent from the start circuit. The vibrator is vibrated in response to the oscillation encouraging signal. When the vibrator is self-excited, the vibrator outputs a first detecting signal indicating an oscillating amplitude and oscillating frequency in the vibration of the vibrator. The sensor boosts the first voltage to a second voltage in response to the first detecting signal and generates a driving signal of a driving frequency and the second voltage. The self-excitation of the vibrator is continued in response to the driving signal. The vibrator outputs a second detecting signal indicating a yaw added to the vibrator. The sensor generates a sensor signal corresponding to the yaw from the second detecting signal.
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Citations
12 Claims
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1. A gyro sensor, comprising:
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a vibrator which is possible to be vibrated in self-excitation;
outputs a first detecting signal indicating an oscillating amplitude and an oscillating frequency in the vibration of the vibrator when the vibrator is set in a condition of self-excitation, and outputs a second detecting signal indicating a yaw added to the vibrator;a driving circuit which generates a first voltage, generates a control signal from the first detecting signal outputted from the vibrator, boosts the first voltage to a second voltage in response to the control signal to generate a driving signal set at both the second voltage and a driving frequency from the control signal, and transmits the driving signal to the vibrator to continue self-excitation of the vibrator in response to the driving signal; and a yaw detecting circuit which generates a sensor signal corresponding to the yaw from the second detecting signal of the self-excited vibrator and outputs the sensor signal, wherein the sensor further comprises a starting circuit which supplies a start signal of a start frequency to the driving circuit and causes the driving circuit to generate an oscillation encouraging signal in response to the start signal by boosting the first voltage to a voltage of the oscillation encouraging signal such that the self-excitation of the vibrator is started in response to the oscillation encouraging signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification