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1.前言近几年来,由于数据处理装置的处理速度有了很大地提高,数据的传输速度也要求相应地增加。如果以具有代表性的外存储装置磁盘或磁鼓作为例子,它的传输速度是由转速和记录密度所决定的。因此,假如仅仅为了增加传输速度,可用提高转速的办法来达到。然而,由于MOS存储器等正沿着大容量、低成本的方向飞快地发展,数字磁记录装置也必须提高记录密度,以达到增加传输速度并降低每位成本的目的。在过去的磁盘、磁鼓中,随着记录密度的增加,由于记录介质上邻近磁化翻转的相互干
1. Introduction In recent years, due to the processing speed of the data processing apparatus has been greatly improved, the data transmission speed also requires a corresponding increase. If the representative of the external storage device disk or drum as an example, its transmission speed is determined by the speed and recording density. Therefore, if only to increase the transmission speed, speed can be used to increase the way to achieve. However, since MOS memories and the like are rapidly developing in a large-capacity and low-cost manner, the digital magnetic recording apparatus must also increase the recording density in order to increase the transmission speed and reduce the cost per bit. In the past magnetic disks and magnetic drums, as the recording density increased, due to the mutual inversion of adjacent magnetization on the recording medium