Detection of current leakage through opto-switches

Details Detection of current leakage through opto-switches Detection of current leakage through opto-switches

G - Physics

01

R

G01R 31/00 (2006.01) A61B 5/0424 (2006.01) G01R 31/327 (2006.01)

Patent

CA 2650306

Apparatus for testing an opto-switch includes a first sense resistor coupled between a power source and an input of the opto-switch, and a second sense resistor coupled to an output of the opto-switch. A test circuit is coupled to sense a first current flowing through the first sense resistor and a second current flowing through the second sense resistor and to generate a test signal responsively to a relation between the first and second currents. A controller is coupled to receive the test signal and to perform a protective action when the test signal exceeds a predetermined limit.

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