Optical communications – Receiver
Reexamination Certificate
2005-08-10
2010-06-08
Liu, Li (Department: 2613)
Optical communications
Receiver
C398S208000, C398S209000, C398S210000, C398S211000, C398S212000, C398S213000, C455S341000, C455S334000
Reexamination Certificate
active
07734193
ABSTRACT:
An apparatus and method for detecting an output power level of an optical receiver, in order to hold output signal levels constant over changing input optical levels. A photodetector detects an optical signal, and a current from the photodetector is applied an amplifier. The amplifier may be either a differential trans-impedance amplifier, or a dual trans-impedance amplifier coupled to a differential output amplifier. An output of the amplifier is applied o a signal detector, wherein an output signal of the signal detector is an indication of an output power level of the optical receiver.
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Liu Li
Reed Smith LLP
Tri Quint Semiconductor, Inc.
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