针对磁光数据存储系统．研究了差分读出信道的结构不对称性对其噪声性能的影响。研究中发现，差分信道抑制共模噪声的能力取决于信道参数的匹配程度。另外还发现．信道结构不对称将导致信道在读取数据“１”和数据“０”时．信道的噪声强度不同。 For magneto-optical data storage system. The effect of structural asymmetry of differential readout channel on its noise performance is studied. The study found that the ability of differential channel to reject common mode noise depends on the matching of channel parameters. Also found. Channel structure asymmetry will cause the channel to read data “1” and data “0”. Channel noise intensity is different.