Magnetoresistive sensors

Invent at 1856

William Thompson

Lord Kelvin

Magnetoresistive sensors

All types

Anisotropic Magnetoresistive (AMR)

Giant Magnetoresistive (GMR)

Colossal Magnetoresistance (CMR)

Magnetoresistive sensors

Theory of AMR

Magnetoresistive sensors

Theory of AMR

2cos

Barber Pole Bias

Magnetoresistive sensors

Theory of AMR

Magnetoresistive sensors

Operation of AMR

Magnetoresistive sensors

Operation of AMR (HMC1501)

Magnetoresistive sensors

Operation of AMR (HMC1501)

Magnetoresistive sensors

Operation of AMR (HMC1501)

Magnetoresistive sensors

Operation of AMR (HMC1512)

Magnetoresistive sensors

Operation of AMR (HMC1512)

Magnetoresistive sensors

Operation of AMR (HMC1512)

Magnetoresistive sensors

Operation of AMR (HMC1512)

Magnetoresistive sensors

Typical application

Cylinder position sensing in pneumatic cylinders Elevator sensor Lid sensor for laptop computers Position sensor for materials handling equipment

(lift trucks) Blood analyzer Magnetic encoders

Magnetoresistive sensors

Comparision of Hall effect & MR technologies

Magnetoresistive sensors

Giant Magnetoresistive (GMR)

Observe at 1988 Magnetoresistivity > 70%

Magnetoresistive sensors

Giant Magnetoresistive (GMR) - Theory

Magnetoresistive sensors

Giant Magnetoresistive (GMR) - Application

Proximity Detection Displacement Sensing Rotational Reference Detection

Colossal Magnetoresistive (CMR)

Observe at 1988 Magnetoresistivity > 1000% ~ 10000000%

Magnetoresistive sensors

Comparison