论文部分内容阅读
由于需要一个频率很高的偏移电流,所以在记录窄脉冲信号时不能利用高频磁化的优点。因为根据高频磁化理论,信息存储体的铁磁材料需在一个衰减的交变磁场中多次磁化。假如,即使只要5～7次就够了,那么,要记录宽度为0.1微秒的脉冲信号,磁化频率就需要50～70兆周,这样就会使写磁头里产生很大的损耗。如果用直流偏磁法,又会使记录的特性变坏。此外,连续编磁(不论是直流或是交流的)有时
Since a high frequency offset current is required, the advantage of high frequency magnetization can not be utilized when recording narrow pulse signals. Because according to the theory of high frequency magnetization, the ferromagnetic material of the information memory needs to be magnetized multiple times in a decaying alternating magnetic field. If, even as long as 5 to 7 times is enough, then to record a pulse width of 0.1 microseconds, the magnetization frequency would take 50 to 70 megacycles, which would result in significant loss in the write head. If the DC bias method, it will make the recording of the characteristics of deterioration. In addition, continuous coding (either DC or AC) sometimes