Asynchronous transfer of high speed data signals through an optoelectronic VLSI switch
A switch, of the crossbar type, in which no clock recovery is undertaken. Multiple optical fibers deliver input signals to a single semiconductor die. The die contains circuitry which selectively connects each input fiber to a respective output fiber, which carries the signals off the die, to their destinations. The communication is asynchronous: no continuous clock signal accompanies the incoming data. However, periodic sequences of clock signals accompany the incoming data, and are used by circuitry on the die in &#8220;clock recovery&#8221; routines, to generate local clock signals. The invention eliminates the need for local clock recovery: the incoming signals are routed through the die to outgoing fibers, without generation of a local clock signal on the die.
Lucent Technologies Inc.
H H G G H G
H04Q H04Q G02B G02B H04Q G02B
additional additional additional additional inventional additional
Ashok Richard G. Anthony L.
Krishnamoorthy Rozier Lentine