Patent ID: 11942298
Assignee: TDK ELECTRONICS AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A switching device comprising:
a movable contact being movable by an armature;
a permanent magnet attached to the armature;
a magnetically-operated switch being a Hall switch; and
a signal processing device comprising:
a measuring resistor directly connected in series to the magnetically-operated switch;
a comparator configured to compare a voltage drop across the measuring resistor with a reference voltage, the reference voltage being predetermined by a Zener diode; and
an electronic switch having a control input connected to an output of the comparator,
wherein the magnetically-operated switch, the Zener diode and the comparator are connected to a common voltage supply, and
wherein the control input of the electronic switch is connected to the output of the comparator via a voltage divider.