A 10-Gb/s Adaptive Equalizer with Wide Input Swing Range in 0.13μm CMOS Technology

• Main Authors: Yang, Chih-Chung, 楊至中
• Other Authors: Tsai, Chia-Ming
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/20879151550112831453

碩士 === 國立交通大學 === 電子研究所 === 99 === This thesis describes a 10Gb/s adaptive equalizer with the dual loop control system of the amplitude and slope detections. The variable gain amplifier can adjust the input swing automatically, so the equalizer output has a large amplitude to acquire good signal to noise ratio, SNR .Meanwhile, fixed input swing of the slope detector can detect correct the slope information. The variable gain amplifier is realized as two stages with Cheery-Hooper architecture, and DC gain control range is from -16dB to 9dB. Swing variation is sensitive to overshooting of the over-compensated equalizer. The dummy path circuits only contain DC gain of the equalizer and variable gain amplifier. The swing detector will not include overshooting of the over-compensated equalizer to get a more accurate amplitude information. The Swing detector includes top hold ciucuits, common mode circuits and 6dB-amplifier to maintain same input swing with main path circuits. Swing and slope control circuits with a high loop gain of each can mitigate interferences between the two loops. The maximum channel length is 33 inches of the FR4 material having a loss of 23dB at 5GHz for the equalizer. Using the interpolation weighting controller can compensate the shortest channel to 0 inches. For a 27 - 1 PRBS, input swing range is from 100mV to 600mV with a bit error rate of less than 10-13. Fabricated in 0.13-μm CMOS technology, the power consumption is 81mW from 1.5-V supply.