Fujitsu's 56Gbps circuit doubles communication speeds between CPUs

fujitsu receiver circuit
Fujitsu Laboratories


The receiver circuit can attain speeds of 56Gbps, Fujitsu Laboratories said Friday, claiming the circuit was the fastest of its kind in the world.


It uses decision feedback equalizer circuits to compensate for degradation in incoming data signals. By using an anticipatory “look ahead” architecture in the circuit to correct for degradation problems, Fujitsu Labs was able to increase the operating frequency of the circuit and double its speed.

The approach “can be implemented as a parallel process, pre-calculating two candidates based on the selection result for the previous bit, and simultaneously deciding the value of the previous bit and the current bit after deciding the value of the bit two bits previous,” Fujitsu Labs said in a statement.



“It is possible to integrate this technology into consumer devices,” Hisakatsu Yamaguchi, a research manager in the Server Technologies Lab at Fujitsu Laboratories, wrote in an email interview.



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