Magnetoresistive sensors and associated production method
AssigneeInfineon Technologies AG
InventorManuel GILLINGER
Life of this patent
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Abstract
A magnetoresistive sensor contains a bridge circuit having at least one magnetoresistive resistor, wherein the bridge circuit is configured to provide a first differential analog output voltage. The magnetoresistive sensor also contains an amplifier circuit connected downstream of the bridge circuit, wherein the amplifier circuit is configured to provide a second differential analog output voltage based on the first differential analog output voltage provided by the bridge circuit. The second differential analog output voltage has a value of zero at a specified magnetic field strength not equal to zero. A common-mode voltage associated with the second differential analog output voltage corresponds to a specified percentage of a supply voltage of the bridge circuit.
Claims15
A magnetoresistive sensor, comprising:
- a bridge circuit having at least one magnetoresistive resistor, wherein the bridge circuit is designed to provide a first differential analog output voltage;
- and
- an amplifier circuit connected downstream of the bridge circuit, wherein the amplifier circuit is designed to provide a second differential analog output voltage based on the first differential analog output voltage provided by the bridge circuit, wherein the second differential analog output voltage has a value of zero at a specified magnetic field strength not equal to zero, and
- wherein a common-mode voltage associated with the second differential analog output voltage corresponds to a specified percentage of a supply voltage of the bridge circuit.
A method for producing a magnetoresistive sensor, wherein the method comprises:
- creating a bridge circuit having at least one magnetoresistive resistor, wherein the bridge circuit is designed to provide a first differential analog output voltage;
- and
- creating an amplifier circuit connected downstream of the bridge circuit, wherein the amplifier circuit is designed to provide a second differential analog output voltage based on the first differential analog output voltage provided by the bridge circuit,
- wherein the second differential analog output voltage has a value of zero at a specified magnetic field strength not equal to zero, and
- wherein a common-mode voltage associated with the second differential analog output voltage corresponds to a specified percentage of a supply voltage of the bridge circuit.
Dependencies are inferred from the claim text.