infoTECH Feature

June 01, 2010

Fujitsu Microelectronics Releases Technical Paper for Advanced Telecom Applications

Fujitsu Microelectronics America, Inc. (FMA), a company that provides high-quality, reliable semiconductor products and services for the wireless, automotive, consumer, and other markets all throughout North America and South America, released a technical paper entitled 'The Fujitsu 56GSa/s Analog-to-Digital Converter Enables 100GbE Transport.'

Fujitsu Microelectronics America (News - Alert), Inc. (FMA) is a provider of ICT-based business solutions for the worldwide marketplace. With around 170,000 employees, Fujitsu provides support to customers in 70 countries and brings together a global corps of systems and services experts with very reliable computing and communications products and highly developed microelectronics to offer customers added value.

The 'The Fujitsu 56GSa/s Analog-to-Digital Converter Enables 100GbE Transport' technical paper explains that technology difficulties that are involved in the development of a long-haul 100 gbps optical transport network. The technical paper also describes the enabling technology created by Fujitsu Microelectronics for 100 gbps Ethernet and OTU-4 transport systems by the use of coherent receivers.

A 100 gbps coherent receiver requires four 56GSa/s Analog-to-Digital Converters (ADCs). It also needs a tera-OPS DSP that disperses only tens of watts. The 'The Fujitsu 56GSa/s Analog-to-Digital Converter Enables 100GbE Transport' technical paper talks about the forces that push in the direction of a single-chip CMOS solution. The technical paper also presents the really fast CMOS ADC (News - Alert) from Fujitsu Microelectronics. The CMOS ADC provides the enabling technology for 100 gbps Ethernet and OUT-4 transport systems by the use of coherent receivers.

The industry has stayed on dual-polarization, quadrature, phase-shift keying (DP-QPSK) as a modulation strategy to offer a long-haul 100 gbps optical transport network with maximum reach and immunity optical fiber non-idealities. This implies that a coherent receive is needed. The biggest implementation challenge that results from this decision is the need for low-power, ultra-high-speed ADCs. The way such a receiver can be applied is defined by the technology requirements.

Fujitsu was in news earlier this year when it selected IAR Systems' integrated development environment IAR Embedded Workbench to provide a development toolchain for the Jade-L Starterkit.


Anuradha Shukla is a contributing editor for TMCnet. To read more of Anuradha's article, please visit her columnist page.

Edited by Alice Straight
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