Optical receiver for compensating DC offset
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United States of America Patent
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Sep 6, 2016
Grant Date -
Jul 9, 2015
app pub date -
Dec 29, 2014
filing date -
Dec 31, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
Disclosed is an optical communication receiver capable of compensating a DC offset while preventing an input load effect. The optical communication receiver includes an optical signal detector; an amplifier inputted with a photocurrent outputted from the optical signal detector; and a DC offset compensation unit provided therein with a third transistor and a fifth transistor which are connected in series to each other to prevent an input load effect, wherein the DC offset compensation unit compensates a DC offset by outputting at least a portion of DC current inputted to the amplifier to ground through the third transistor and the fifth transistor when the photocurrent is an over current more than a predetermined set value.
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