1.前言3度3线方式,即所谓的3 D-3 W 磁心存储器,是将原来的3度4线方式的读出线和禁止线共用,减少了一根磁心的穿线。因此它的缺点是使读出一禁止电路变得复杂一些。但下列各点比3度4线方式优越。(1)由于穿线简单,磁心体价格便宜。(2)磁心排列能高密度,因而可实现小型化,而且重量轻。 1. Introduction The 3-degree-3-wire method, called the 3 D-3 W core memory, uses the original 3 degree-4 wire readout line and the forbidden line to reduce the threading of one core. Therefore, it has the disadvantage of making it more complicated to read out a forbidden circuit. However, the following points than 3 degree 4 line superiority. (1) Due to simple threading, magnetic core body is cheaper. (2) The arrangement of the magnetic core can be high density, so that it can be miniaturized and light in weight.