本文用TTL技术讨论三值组合电路的设计。提出了用于输入端口和输出端口的两个三值和二值互相变换的转换器,从而可利用二值代数中的化简法则,使设计出的三值组合电路结构简单,成本降低。本文所用的代数系统简易,基本电路的理论分析和实验证明取得一致,设计举例也已通过HSPICE程序。 This article discusses the design of three-value combinational circuit with TTL technology. Two converters of three-value and two-value conversion for input port and output port are proposed, so that the simplification rule in binary algebra can be utilized to make the designed three-value combining circuit simple in structure and low in cost. Algebraic system used in this article is simple, the theoretical analysis of the basic circuit and the experiment proved consistent, design examples have also been through the HSPICE program.