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本文论述的内容主要是围绕203机NC的设计、定型而展开的。为了讨论方便起见,文中也涉及到3D3W方案的一般理论问题。全文分三部分:第一部分引言;第二部分较详细地介绍了203——NC的总体方案,并给出了203机NC的简框图;第三部分较详细地论述了203机NC的系统设计,如译码方式的选择、存取周期的估算、磁心板穿线方案的设计、二极管的测试方案、读放大器的选用、驱动电路的设计等。在这一部分的末尾还给出了203——NC的全部驱动电路如Ⅴ_D,Ⅰ_Q,Ⅰ_i及开关稳流源Ⅰ_w。
This article discusses the content is mainly around 203 NC design, shape and expand. For the sake of discussion, the paper also deals with the general theory of 3D3W scheme. The full text is divided into three parts: The first part is introduction; The second part introduces the overall scheme of 203 - NC in more detail and gives the frame diagram of 203 machine NC; The third part discusses the system design of 203 machine NC in more detail , Such as the choice of decoding mode, the estimation of access cycle, core board threading program design, diode test program, read amplifier selection, drive circuit design. At the end of this section are also given 203 - NC all the drive circuit such as Ⅴ_D, Ⅰ_Q, Ⅰ_i and switching current source Ⅰ_w.