这是本人在网上搜索了很久才找到的PLC与上位机通讯的相关论文,希望大家喜欢。-this is my online search for a long time to find the PLC and PC communications related papers, hope you like them.
半导体三极管除了构成放大器和作开关元件使用外,还能够做成一些可独立使用的两端或三端器件。文中介绍了三极管的几种特殊用途-Posed apart from the semiconductor transistor amplifiers and switching elements for use, but also be able to make some available for independent use of both ends, or three-terminal device. In this paper, several special-purpose transistor