Analysis and optimization of combined equalizer for high speed serial link

Many factors influence the choice of equalization for high speed serial link. This paper presents the analysis and optimization of combined equalizer for high speed serial link based on the ADS simulation. By modeling the high speed serial link, which mainly includes the equalization for the loss of channel, the performance of various equalizers including pre-emphasis in transmitter, CTLE/DFE in receiver and some combined equalizers are analyzed for different channels. The results show that much better performance can be obtained by using some combined equalization architectures compared to using CTLE or DFE separately, and the cost is only a little increase in complexity.