Optical communications – Receiver
Reexamination Certificate
2003-06-06
2009-10-06
Pascal, Leslie (Department: 2613)
Optical communications
Receiver
Reexamination Certificate
active
07599629
ABSTRACT:
The present invention is directed towards an optical receiver including an open loop automatic gain control (AGC) circuit. Optical signals received by the optical receiver are converted to electrical signals via a photodiode. The electrical signals are subsequently amplified through an input and an output amplifier stage. The amplified signal is then converted to RF signals and provided to an output port for further transmission. Concurrently, the AGC circuit senses the input optical power level at the input photodiode. The input optical power level is compared with a reference voltage, thereby providing a difference voltage. The difference voltage is applied to input and output amplifier stages for correcting the electrical signals to ensure a constant output power level.
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Kamali Walid
Skrobko John
Pascal Leslie
Scientific-Atlanta, Inc.
Tarolli, Sundheim Covell & Tummino LLP
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