Sensor responsive to varying magnetic field hinges - has only two output mines and provides constant current at working resistance irrespective of control field intensity

摘要

The sensor responsive to variations in the strength and/or direction of magnetic field lines has only two connecting lines. A voltage (Us) taken from a divider point (5) is amplified in a first amplification stage (10) and fed to a second amplifier stage (18) in the form of a comparator or Schmitt trigger. The second stage's output level depends on the presence or absence of a field and drives a third amplifier stage (24) used as a current regulator. ADVANTAGE - Provides constant current level at working resistance irrespective of control field intensity.