Method and apparatus for shared positive protection
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United States of America Patent
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May 14, 2013
Issued Date -
N/A
app pub date -
Aug 31, 2009
filing date -
Aug 31, 2009
priority date (Note) -
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Abstract
A line card includes a plurality of subscriber line interface circuits, a plurality of interface lines, and a first overvoltage protector. The subscriber line interface circuits each have a first input terminal operable to receive power at a first positive reference voltage. The interface lines are each coupled to one of the subscriber line interface circuits for interfacing with subscriber lines external to the line card. The first overvoltage protector is coupled to the interface lines and referenced to the first positive reference voltage to provide overvoltage protection responsive to a voltage on at least one of the interface lines exceeding the first positive reference voltage.
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