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二进制逻辑图形符号简称逻辑符号。逻辑符号是逻辑含义的抽象概括,它不同于常规的电工符号。在常规电工符号中,如电容器符号象是两块平行板;扬声器符号象个喇叭等等,而逻辑符号已完全没有这种“象形”的特点,纯属是抽象的符号。我国以往普遍使用的逻辑符号是1978年开始实施的由原四机部制订和发布的SJ1223-77符号。该符号适用于所有以二进制逻辑元件为基本单元绘制的各种略图、技术文件和与之有关的各级标准。SJ1223-77符号的绘制原则已接近于国际标准逻辑符号的绘制原则,但表示方式简单,符号尚不能充
Binary logic graphic symbols are short logic symbols. Logical symbols are abstract generalizations of logical meaning that differ from the usual electrical symbols. In conventional electrical symbols, such as capacitor symbols like two parallel plates; speaker symbol like a horn and so on, and logical symbols have no such “pictographic” features, purely abstract symbol. The logic symbol commonly used in our country was the symbol SJ1223-77 formulated and promulgated by the former four ministries in 1978. This symbol applies to all the basic elements of the binary logic elements drawn sketch, technical documents and related standards at all levels. SJ1223-77 symbols drawing principle is close to the international standard logical symbols drawing principle, but said the way is simple, the symbol can not be filled