A 7.5-Gb/s One-Tap-FFE Transmitter With Adaptive Far-End Crosstalk Cancellation Using Duty Cycle Detection
A 7.5-Gb/s One-Tap-FFE Transmitter With Adaptive Far-End Crosstalk Cancellation Using Duty Cycle Detection
复制标题
DOI：
10.1109/jssc.2012.2227604
复制
发表时间：
2013-02
影响因子：
5.4
通讯作者：
Shih-Yuan Kao;Shen-Iuan Liu
中科院分区：
文献类型：
--
作者：
Shih-Yuan Kao;Shen-Iuan Liu
提出了一种采用单抽头前馈均衡器（FFE）和自适应远端串扰消除（FEXT）的2.5-7.5 Gb/s发射机。为了消除符号间干扰，还采用单抽头FFE。串扰消除器（XTC）适于通过使用反相脉冲来消除FEXT。为了消除由于耦合微带线与各种间距的FEXT，XTC的脉冲幅度的数字控制，通过使用建议的占空比检测。单抽头FFE和XTC合并在一起以节省功率。该自适应发射机采用65 nm CMOS工艺制造。1.2 V电源的最大功耗为26.4 mW，核心面积为0.0307 mm 2。对于间距为8 mil的两条5 in FR 4印刷电路板走线，对于27 - 1的7.5 Gb/s PRBS，恢复数据的实测均方根和峰峰值抖动分别改善了10.01和48.9 ps。XTC的校准时间为1.17 μs。
A 2.5-7.5-Gb/s transmitter with one-tap feed-forward equalizer (FFE) and adaptive far-end crosstalk (FEXT) cancellation is presented. To cancel the intersymbol interference, the one-tap FFE is also employed. A crosstalk canceller (XTC) is adapted to cancel FEXT by using inverse pulses. To cancel the FEXT due to the coupled microstrip lines with various spacing, the pulse amplitude of the XTC is digitally controlled by using the proposed duty cycle detection. The one-tap FFE and the XTC are merged together to save the power. This adaptive transmitter is fabricated in a 65-nm CMOS technology. The maximum power consumption from a 1.2-V supply is 26.4 mW, and the core area occupies 0.0307 mm2 . For two 5-in FR4 printed-circuit-board traces with the spacing of 8 mil, the measured rms and peak-to-peak jitters of the recovered data are improved by 10.01 and 48.9 ps, respectively, for a 7.5-Gb/s PRBS of 27 -1 . The measured calibration time of the XTC is 1.17 μs.