Sensor device
AssigneeAblic Inc.
InventorDaisuke MURAOKA
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Abstract
To reduce effects of noise and improve detection accuracy, a sensor device includes: a detection electrode opposing an external electrode to which a predetermined voltage is applied, and configured to generate a voltage corresponding to a change in electrostatic capacitance; and a capacitive amplifier circuit having a first capacitor and a second capacitor connected in series to each other, and configured to detect the voltage generated in the detection electrode, and output a detection signal obtained by amplifying the voltage generated in the detection electrode based on a capacitance ratio between the first capacitor and the second capacitor.
Claims9
A sensor device, comprising:
- a detection electrode opposing an external electrode to which a predetermined voltage is applied, and configured to generate a voltage corresponding to a change in electrostatic capacitance;
- and
- a capacitive amplifier circuit having a first capacitor and a second capacitor connected in series to each other, and configured to detect the voltage generated in the detection electrode and output a detection signal obtained by amplifying the voltage generated in the detection electrode based on a capacitance ratio between the first capacitor and the second capacitor.
Dependencies are inferred from the claim text.