A 5.4-Gbit/s Adaptive Continuous-Time Linear Equalizer Using Asynchronous Undersampling Histograms

作者：Kim Wang Soo^*; Seong Chang Kyung; Choi Woo Young

来源：IEEE Transactions on Circuits and Systems II-Express Briefs, 2012, 59(9): 553-557.

DOI：10.1109/TCSII.2012.2208671

• Adaptive equalization
• asynchronous undersampling histogram
• continuous-time linear equalizer (CTLE)

We demonstrate a new type of adaptive continuous-time linear equalizer (CTLE) based on asynchronous undersampling histograms. Our CTLE automatically selects the optimal equalizing filter coefficient among several predetermined values by searching for the coefficient that produces the largest peak value in histograms obtained with asynchronous undersampling. This scheme is simple and robust and does not require clock synchronization for its operation. A prototype chip realized in 0.13-mu m CMOS technology successfully achieves equalization for 5.4-Gbit/s 2(31) - 1 pseudorandom bit sequence data through 40-, 80-, and 120-cm PCB traces and 3-m DisplayPort cable. In addition, we present the results of statistical analysis with which we verify the reliability of our scheme for various sample sizes. The results of this analysis are confirmed with experimental data.

• 出版日期2012-9