说明：  芯片主要有以下几种接口电平：TTL（LVTTL）、CMOS、ECL、PECL、LVPECL、LVDS等，其中PECL、LVPECL、LVDS主要应用在高速芯片的接口，不同电平间是不能直接互连的，需要相应的电平转换电路和转换芯片，了解各种电平的结构及性能参数对分析电路是十分必要有益的，本文正是从各种电平信号的性能参数开始，结合参考资料对电平信号的互连进行介绍。
(Chip main level of the following interfaces: TTL (LVTTL), CMOS, ECL, PECL, LVPECL,, LVDS, PECL, LVPECL, LVDS applications in high-speed chip interfaces, different level is not directly interconnected need the chip level conversion circuit and converted to understand the level of structure and performance parameters on the analysis of the circuit is very necessary beneficial This article is from the various performance parameters of the level signal, combined with reference data on electricity The level signal interconnect introduce.)