Wednesday, February 14, 2007
Fujitsu Ltd. unveils the industry's first CMOS C that performs clock and data recovery (CDR) at 40-to-44-Gbps, enabling the implementation of 40-Gbps optical serializer-deserializer modules in the future, the company said.
The CMOS CDR, which dissipates 0.91-Watt of power while operating at 40-Gbps, uses a novel 3- oversampling architecture, according to Fujitsu. Input data is sampled using a 24-phase distributed VCO, and a digital CDR recovers 16 bits and a 2.5GHz clock by processing the samples.
The die size is 0.8-1.8mm2 and was fabricated in Fujitsu's 90-nm CMOS process. ''This research demonstrates the viability of CMOS for implementing the most difficult circuit blocks in future high-speed optical modules,'' said William Walker, vice president of the Components and Devices Integration Group at Fujitsu Laboratories of America Inc., in a statement.
By: DocMemory
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