提出了一种用于100/1000Base-TX收发器的频域均衡器和新颖的基线漂移消除电路.均衡器采用混和信号模式的自适应控制环路,系统优化使其性能不依赖于信道模型的精确性,控制环路稳定可靠,该均衡器还同时实现自动增益控制功能;基线漂移消除电路采用峰值检测器监测基线漂移,用负反馈思想实现漂移量的消除,消除精度高,性能可靠.电路采用0.25μm CMOS工艺进行了硅片验证,与文献结果相比,本文方案在性能和芯片面积上均具有明显优势. A frequency domain equalizer and a novel baseline wander canceling circuit are proposed for 100 / 1000Base-TX transceiver.The equalizer uses a mixed signal mode adaptive control loop, and the system is optimized to make its performance independent of the channel model Accuracy and stability of the control loop, and the equalizer also realizes the automatic gain control function at the same time; the baseline drift elimination circuit uses a peak detector to monitor the baseline drift, eliminates the drift amount by the negative feedback idea, eliminates the high precision and has reliable performance, Using 0.25μm CMOS technology for silicon verification, compared with the literature results, this program has obvious advantages in terms of performance and chip area.