Patent ID: 8451002

Claim:
A magnetic field sensor, comprising: a lead frame comprising: a base plate, a ground pin coupled to the base plate, and a signal output pin; a first circuit board disposed over the lead frame, the first circuit board comprising a conductive trace disposed thereon; a circuit die disposed over the first circuit board, the circuit die comprising: a substrate; a magnetic field sensing element disposed upon the substrate and configured to generate a magnetic field signal responsive to a magnetic field; an output circuit disposed upon the substrate, the output circuit comprising a circuit ground node and a circuit output node, wherein the output circuit is configured to generate an output signal at the circuit output node responsive to the magnetic field signal; a ground circuit trace having first and second ends, wherein the first end of the ground circuit trace is coupled to the circuit ground node; a ground bonding pad coupled to the second end of the ground circuit trace; an output signal circuit trace having first and second ends, wherein the first end of the output signal circuit trace is coupled to the circuit output node; and an output signal bonding pad coupled to the second end of the output signal circuit trace, wherein the magnetic field sensor further comprises: a circuit loop comprising a conductive path between the ground pin and the signal output pin, wherein the circuit loop has a circuit loop interior area; a compensated signal output node coupled to the circuit output node; and a conductive structure, comprising: a compensation loop coupled in a series arrangement with the circuit loop, wherein the compensation loop comprises the conductive trace disposed upon the first circuit board, wherein the compensation loop has a compensation loop interior area, wherein the compensation loop interior area is selected to be related to the interior area of the circuit loop, wherein a path traversing the circuit loop in a direction from a first end of the series arrangement to a second end of the series arrangement has a circuit loop rotation direction opposite from a compensation loop rotation direction traversing the compensation loop along the same path, and wherein the compensation loop interior area and the compensation loop rotation direction are selected to result in a reduction of an overshoot or an undershoot of an output signal at the compensated signal output node resulting from the circuit loop experiencing a rapid change in flux of the magnetic field.