Overvoltage protection with power sink
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United States of America Patent
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Mar 26, 2013
Issued Date -
N/A
app pub date -
Aug 31, 2009
filing date -
Aug 31, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A line card includes a subscriber line interface circuit, an interface line, and a first overvoltage protector. The subscriber line interface circuit has a first input terminal operable to receive power at a first reference voltage. The interface line is coupled to the subscriber line interface circuit for interfacing with a subscriber line external to the line card. The first overvoltage protector is coupled to the interface line and referenced to the first reference voltage to provide overvoltage protection responsive to a voltage on the interface line exceeding the first reference voltage by a first predetermined threshold.
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