A universal literal circuit and its application to quaternary logic networks

✍ Scribed by Chotei Zukeran; Yasunori Nagata; Chushin Afuso; Makoto Honda; Yutaka Nagamine

• Book ID: 104591479
• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 832 KB
• Volume: 23
• Category: Article
• ISSN: 0882-1666
• DOI: 10.1002/scj.4690230204

✦ Synopsis

Abstract

A new type of universal literal circuit, in which two thresholds of the circuit are variable and controlled by external signals, is proposed herein. The circuit is designed with CMOS‐FETs, and both computer simulation by FSPICE and experiments on bread‐board with discrete elements confirm its correct operation.

A new type of basic quaternary operator, quaternary U‐gate, is also introduced. The U‐gate comprises a pair of CMOS pass transistors driven by the output of the universal literal circuit. Mathematical properties of the U‐gate are derived, and synthesis procedures of quaternary logic functions using U‐gates are given. The quaternary U‐gate and quaternary constants form a complete set of quaternary operators and its mathematical properties implicate those of CP‐gates and SCP‐gates.