E1接收部分主要功能是实现从输入的差分线路数据中恢复出2.048M线路时钟并将数据解码输出。包括解码和线路时钟恢复两模块。-E1 to receive some of the major functions of the difference from the input data lines to recover a clock and data lines 2.048M decoder output. Including decoding and clock recovery circuit