Patent ID: 8525511

Claim:
A system for monitoring an alternating current comprising: a magneto-optical current transducer adapted to modulate an optical signal corresponding to the magnitude of the alternating current, said transducer includes a first output and a second output and a first input and a second input; a first and a second beam splitter being in communication with said first and said second output respectively; a first and a second channel being in communication with said first and said second beam splitter respectively; said first channel including a first LED and said second channel including a second LED, said first LED in communication with said second beam splitter and said second LED in communication with said first beam splitter, said first channel including a first output and said second channel including a second output; a difference amplifier connected to said first and said second channel outputs to subtract said first and said second channel outputs from one another to eliminate vibration induced disturbance, and outputting a subtracted signal at an amplifier output; and wherein said first and said second LEDs are powered by a constant current source.