1. Magnetoresistive sensors
Invent at 1856
William Thompson
Lord Kelvin

2. Magnetoresistive sensors All types
Anisotropic Magnetoresistive (AMR)
Giant Magnetoresistive (GMR)
Colossal Magnetoresistance (CMR)

3. Magnetoresistive sensors Theory of AMR

4. Magnetoresistive sensors Theory of AMR
Barber Pole Bias

5. Magnetoresistive sensors Theory of AMR

6. Magnetoresistive sensors Operation of AMR

7. Magnetoresistive sensors Operation of AMR (HMC1501)

8. Magnetoresistive sensors Operation of AMR (HMC1501)

9. Magnetoresistive sensors Operation of AMR (HMC1501)

10. Magnetoresistive sensors Operation of AMR (HMC1512)

11. Magnetoresistive sensors Operation of AMR (HMC1512)

12. Magnetoresistive sensors Operation of AMR (HMC1512)

13. Magnetoresistive sensors Operation of AMR (HMC1512)

14. 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

15. Magnetoresistive sensors Comparision of Hall effect & MR technologies

16. Magnetoresistive sensors Giant Magnetoresistive (GMR)
Observe at 1988
Magnetoresistivity > 70%

17. Magnetoresistive sensors Giant Magnetoresistive (GMR) - Theory

18. Magnetoresistive sensors Giant Magnetoresistive (GMR) - Application
Proximity Detection
Displacement Sensing
Rotational Reference Detection

19. Colossal Magnetoresistive (CMR)
Observe at 1988
Magnetoresistivity > 1000% ~ %

20. Magnetoresistive sensors Comparison