Coherent light generators – Particular beam control device – Having particular beam control circuit component
Reexamination Certificate
2007-06-12
2007-06-12
Nguyen, Dung (Michael) T. (Department: 2828)
Coherent light generators
Particular beam control device
Having particular beam control circuit component
C372S029020, C372S038020
Reexamination Certificate
active
11054999
ABSTRACT:
An exemplary optoelectronic transceiver100incorporating features of the present invention is shown in FIGS.2and3. The transceiver100contains a receiver circuit, a transmitter circuit, a power supply voltage19and ground connections20. The receiver circuit of the transceiver includes a Receiver Optical Subassembly (ROSA)102, which may contain a mechanical fiber receptacle as well as a photodiode and pre-amplifier (preamp) circuit. The ROSA102is in turn connected to a post-amplifier (postamp) integrated circuit106, the function of which is to generate a fixed output swing digital signal which is connected to outside circuitry via the RX+ and RX− pins17. The postamp circuit106also often provides a digital output signal known as Signal Detect or Loss of Signal indicating the presence or absence of suitably strong optical input. The postamp circuit106does not necessarily have to be used to generate the Signal Detect or Loss of signal. In alternative embodiments, the postamp circuit106could be replaced with a CDR (“Clock Data Recovery”) or a demux chip, which embodiments are not shown.
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