Fujitsu CMOS Chip Recovers Clock and Data at 40-44Gbps

Fujitsu Laboratories has developed a CMOS IC that performs clock and data recovery (CDR) at 40 to 44Gbps and de-multiplexes to 16 x 2.5Gbps.. Future applications include 40Gbps optical serializer-deserializer modules. The IC also complies with the ITU G.8251 jitter tolerance mask standard, achieving BER <10(-12) with a 2(31)-1 PRBS source. Previous ICs with similar or less functionality have been implemented in SiGe, biCMOS and other compound semiconductor technologies. "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 the near future, we will be able to demonstrate that the remaining blocks, such as the serializer and limiting amplifier, can also be implemented in CMOS and integrated together with the deserializer on the same IC."http://jp.fujitsu.com/group/labs/en