Active measurement correction of resistive sensors
AssigneeRenesas Electronics America Inc.
InventorDavid Mitchell Grice
Life of this patent
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Abstract
In an embodiment, an apparatus is disclosed that comprises a plurality of resistors arranged as a reverse bridge and configured to convert an input voltage to a scaled output voltage. The scaled output voltage is scaled to a target format based at least in part on a range of the input voltage and a fixed value of the plurality of resistors. The input voltage is generated based at least in part on at least one signal generated by a sensor based at least in part on a measurement of a property of a measurement target. At least one of the plurality of resistors has a resistance value of R and at least another of the plurality of resistors has a resistance value of R plus or minus ΔR.
Claims19
An apparatus comprising:
- a plurality of resistors arranged as a reverse bridge and being configured to convert an input voltage to a scaled output voltage, the scaled output voltage being scaled to a target format based at least in part on a range of the input voltage and a fixed value of the plurality of resistors, the input voltage being generated based at least in part on at least one signal generated by a sensor based at least in part on a measurement of a property of a measurement target,
- wherein at least one of the plurality of resistors has a resistance value of R and at least another of the plurality of resistors has a resistance value of R plus or minus ΔR.
A system comprising:
- a sensor signal conditioning integrated circuit, the sensor signal conditioning integrated circuit being configured to:
- receive at least a first sensor signal and a second sensor signal from a sensor, the first and second sensor signals being generated by the sensor based at least in part on a measurement of a property of a measurement target;
- and
- generate an input voltage based at least in part on a differential voltage between the first and second sensor signals, the input voltage having a range that is proportional to a measurement range the property of the measurement target that is being measured by the sensor;
- and
- a plurality of resistors arranged as a reverse bridge, the reverse bridge being configured to convert the input voltage to a scaled output voltage, the scaled output voltage being scaled to a target format based at least in part on the range of the input voltage and a fixed value of the plurality of resistors.
A system comprising:
- a sensor signal conditioning integrated circuit, the sensor signal conditioning integrated circuit being configured to:
- receive at least a first sensor signal and a second sensor signal from a sensor, the first and second sensor signals being generated by the sensor based at least in part on a measurement of a fluid pressure corresponding to a pressure monitor of a patient;
- and
- generate an input voltage based at least in part on a differential voltage between the first and second sensor signals, the input voltage having a range that is proportional to a measurement range the fluid pressure that is being measured by the sensor;
- and
- a plurality of resistors arranged as a reverse bridge, the reverse bridge being configured to:
- convert the input voltage to a scaled output voltage, the scaled output voltage being scaled to a target format based at least in part on the range of the input voltage and a fixed value of the plurality of resistors;
- and
- provide the scaled output voltage to a presentation device.
Dependencies are inferred from the claim text.