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G01R 19/00 (2006.01) G01R 15/00 (2006.01) G01R 15/14 (2006.01) G01R 15/22 (2006.01) H03G 3/20 (2006.01) H04B 10/152 (2006.01)
Patent
CA 1098965
RD-6520 Abstract of the Disclosure An optical data transmission system for use with current sensors on ac high voltage transmission lines comprises a light-emitting diode transmitter at line potential and a cilicon photodiode receiver at: ground potential. Signals are conducted from the transmitter to receiver along a fiber optic light pipe. A silicon photodiode in a feedback configuration produces a linear ac output light from the light-~mitting diode in xe~ponse to line c:urrent. A dc ref~re3nce ~ignal i~ ~uperirnpo~d on ~he ac curren~ data ~ignal to provide 3yetem yain c21ibration. Tht~ do signal 1~ utilized, in a fe~dbaak loop, to con~rol th~ gain of an ac signal amplif ier is~ the receiver and thua ~tal~ll$e ~y3~em aalibration .
293185
Company General Electric
Eckersley Raymond A.
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