SerDes in High-Reliability, Long Reach Systems
The presentation explores the challenges facing designers implementing systems that are compliant to 10GBASE-KR and CEI11-LR standards. These systems can be 40-50" with multiple connectors and it is desirable to have bit-error-rates (BER) of 10-15 to 10-18 for high-reliability applications, going beyond the specification for these real-world channels. A system model is described and representative channels are presented. The paper explores the architectural and circuit techniques required to meet the stringent requirements, including the trade-offs associated with PLL implementation and receiver equalization. The LC PLL performance (less than 400fs) is shown to enable high-reliability system design.
Posted on Wednesday Jun. 15, 2011