A low insertion loss current sense circuit for line cards

Details A low insertion loss current sense circuit for line cards A low insertion loss current sense circuit for line cards

H - Electricity

04

M

H04M 3/22 (2006.01) H04M 11/06 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2289397

A current sense circuit for sensing a current in a subscriber loop comprising a transformer having a first and second winding coupled for sensing a differential current in a loop, a sense winding for producing a sense current in response to a magnetic flux induced in the transformer due to the differential current, an amplifies circuit for receiving the sense current and wherein the sense current is indicative of a signal on the loop, and the amplifier being configured such that a transformer introduces a low insertion loss at a frequency of operation of the loop.

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