Network filtering circuit for protection lightning surge
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United States of America Patent
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May 22, 2018
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N/A
app pub date -
Apr 1, 2016
filing date -
Apr 3, 2015
priority date (Note) -
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Abstract
The network filtering circuit includes a cable side for connection with a network cable, a physical side for connection with a mother board, and a plurality of transmission channels connected between the cable side and the physical side. Each of the transmission channels includes an isolation transformer with a primary coil connected with the cable side and a secondary coil coupling with the primary coil. A common mode choke has two first ends connected to the physical side and two opposite second ends. A pair of capacitors series connection with the corresponding second ends and are connected between the secondary coil and the common mode choke. The primary coil has a first center tap directly connected to a ground node.
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