Patent ID: 9709640
Date: 2017-07-18
CPC Classifications: G01D,G01R

Claim:
1. A single bridge magnetic field sensor comprising: a substrate having a surface; a fluxguide directly or indirectly mounted to the surface of the substrate, with the fluxguide being a rectangular prism; a bridge unit including a first magnetoresistive element, a second magnetoresistive element, a third magnetoresistive element, and a fourth magnetoresistive element mounted around four sides of the fluxguide in sequence and mounted on the surface of the substrate, with pinning directions of the first and third magnetoresistive elements being away from the fluxguide, and with pinning directions of the second and fourth magnetoresistive elements being towards the fluxguide; a switching circuit electrically connected to two voltage inputs, two grounding terminals, two voltage output terminals, and the first, second, third, and fourth magnetoresistive elements, with the switching circuit configured to proceed with circuit switching according to a magnetic field in each axis direction to be measured, thereby changing electrical connection between the two voltage inputs, the two grounding terminals, the two voltage output terminals, and the first, second, third, and fourth magnetoresistive elements; and a measuring unit electrically connected to the two voltage output terminals and the first, second, third, and fourth magnetoresistive elements, with the measuring unit configured to measure a magnetoresistance of each of the first, second, third, and fourth magnetoresistive elements, and with the magnetoresistances of the first, second, third, and fourth magnetoresistive elements and output voltages of the two voltage output terminals adapted to be used to obtain a magnetic field measurement result.