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Big Bear to design transponders in IBM's SiGe process

Posted: 06 Sep 2002 ?? ?Print Version ?Bookmark and Share

Keywords:big bear networks? dsp? asic? sige? ibm microelectronics?

Big Bear Networks Inc., a startup developing dispersion compensators based on chip-level DSP technology, said it will build its transponder subassemblies based on 10Gb and 40Gb ASICs in IBM Microelectronics' SiGe process technology.

Big Bear's Photronic Signal Processing chips will be fabricated in IBM's SiGe fab in Burlington, Vermont, and will begin shipping later this year.

Big Bear CTO John Mattia said that a careful study had been conducted of SiGe compared to InP devices. While both processes showed similar power and speed advantages, the SiGe process proved easier to integrate digital logic for performing specific compensation for fiber impairments. Mattia said that current InP processes were limited to approximately 5,000 transistors per circuit, compared to millions of transistors for SiGe. Only the latter process would allow the eventual integration of clock and data recovery functions into compensation circuits, he said.

- Loring Wirbel

EE Times

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