Method for operating a gas sensor arrangement and gas sensor arrangement
AssigneeSciosense B.V.
InventorsRohit Ranganathan, Ravi Kumar Adusumalli
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Abstract
In an embodiment a method for operating a gas sensor arrangement includes generating a sensor current by a gas sensor, converting the sensor current into a digital comparator output signal in a charge balancing operation depending on a first clock signal, determining from the digital comparator output signal an asynchronous count comprising an integer number of counts depending on the first clock signal, determining from the digital comparator output signal a fractional time count depending on a second clock signal and calculating from the asynchronous count and from the fractional time count a digital output signal which is indicative of the sensor current generated by the gas sensor.
Claims16
A method for operating a gas sensor arrangement, the method comprising:
- generating a sensor current by a gas sensor;
- converting the sensor current into a digital comparator output signal in a charge balancing operation depending on a first clock signal;
- determining from the digital comparator output signal an asynchronous count comprising an integer number of counts depending on the first clock signal;
- determining from the digital comparator output signal a fractional time count depending on a second clock signal;
- and
- calculating from the asynchronous count and from the fractional time count a digital output signal which is indicative of the sensor current generated by the gas sensor.
A gas sensor arrangement comprising:
- an analog-to-digital converter arrangement comprising a sensor input for connecting a gas sensor and a result output for providing a digital comparator output signal;
- and a signal processing unit connected to the result output of the analog-to-digital converter arrangement,
- wherein the analog-to-digital converter arrangement is operated in a charge balancing operation depending on a first clock signal, and is adapted to convert a sensor current generated by the gas sensor into the digital comparator output signal, and
- wherein the signal processing unit is adapted to determine from the digital comparator output signal a digital output signal comprising an asynchronous count comprising an integer number of counts depending on the first clock signal and comprising a fractional time count depending on a second clock signal, wherein the digital output signal is indicative of the sensor current generated by the gas sensor.
Dependencies are inferred from the claim text.