Output circuit of charge mode sensor
AssigneeHonda Motor Co., Ltd.
InventorYoshimasa Eguchi
Life of this patent
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Abstract
An output circuit of a charge mode sensor includes a second resistor and an operational amplifier. The second resistor connects an output portion of the charge mode sensor and a ground. The operational amplifier is configured to output a detection signal that varies in accordance with an amount of charge kept in the charge mode sensor. The operational amplifier includes an inverting input portion, a non-inverting input portion, and an output portion. The inverting input portion is connected to the output portion of the charge mode sensor via a sensor cable. The non-inverting input portion is connected to a reference voltage. The output portion is connected to the inverting input portion via a first resistor.
Claims14
An output circuit of the charge mode sensor, comprising:
- a second resistor connecting an output portion of the charge mode sensor and a ground;
- and
- an operational amplifier configured to output a detection signal that varies in accordance with an amount of charge kept in the charge mode sensor and comprising:
- an inverting input portion connected to the output portion of the charge mode sensor via a sensor cable;
- a non-inverting input portion connected to a reference voltage;
- and
- an output portion of the operational amplifier connected to the inverting input portion via a first resistor,
- wherein the operational amplifier is configured to output a certain offset signal if a break or short circuit occurs in the charge mode sensor or the sensor cable.
Dependencies are inferred from the claim text.