基于并联开关技术的ECL电路设计

本文首先指出了采用电压信号的多值电路中，在多个开关串联时存在的问题，进而提出了适合于ECL电路设计的两种将串联开关转换成并联开关的方法，并具体设计了采用并联开关的三值ECL电路。设计实例表明这些方法具有简便、规范的特点。用PSPICE对设计的电路进行模拟得到的结果表明，采用并联开关技术设计的电路不仅具有正确的逻辑功能，而且比采用串联开关设计的电路具有更快的速度。

Design of ECL circuits based on parallel switches technique.

Starting from the problems of multi|valued logic circuits using voltage as signal which are designed with cascade switches, two methods for converting cascade switches to parallel switches which are suitable for ECL circuits design were proposed. Using these methods, several ternary ECL circuits with parallel switches were designed, and the design examples show the two methods have the characteristics of simple and normative. The simulation result using PSPICE shows that the designed circuits not only have the correct logic functions, but also have smaller propagation delay than the counterparts designed with cascade switches.