介绍一种电路结构为积木式的A/D转换器,根据需要接入1～16片CD4 0 6 7 B模拟开关,用以相应完成16～256路A/D转换。本转换器只占1～2个口地址,可以用等待、查询、中断3种方式工作。由于硬、软件的通用性好,故可方便地用于所需转换路数不同的大、中、小型发射台的微机自控系统。本文着重介绍它的工作原理和调试方法。 A circuit structure for the building block A / D converter, according to the need to access 1-16 CD4 0 6 7 B analog switch, to complete the corresponding 16 ~ 256 A / D conversion. The converter only accounts for 1 to 2 mouth address, you can wait, query, interrupt 3 ways to work. Due to the hardware and software versatility, it can be easily used for the required number of different conversion path of large, medium and small launch pad microcomputer control system. This article focuses on its working principle and debugging methods.