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US 6,667,682 B2Granted
System and method for using magneto-resistive sensors as dual purpose sensors
AssigneeHoneywell International Inc.
InventorsHong Wan, Lakshman S. Withanawasam
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Abstract
An integrated dual-purpose sensor is shown. The dual-purpose sensor in one embodiment of the present invention includes a full Wheatstone bridge or a half Wheatstone bridge providing two output measurements. Specifically, the Wheatstone bridge provides two output measurements that are utilized to determine a temperature sensor reading and a magnetic sensor reading.
Claims6
A sensing device, comprising in combination:
- a first magnetoresistive element;
- a second magnetoresistive element electrically coupled in series with the first magnetoresistive element;
- a first output taken across the second magnetoresistive element providing a signal proportional to a magnetic field;
- a second output taken across the first and second magnetoresistive elements providing a signal proportional to temperature;
- and
- a logical sensing element operable to convert the first and second outputs into magnetic field and temperature readings using magnetoresistive characteristics of the first and second magnetoresistive elements.
3 more elements
Dependencies are inferred from the claim text.