三值绝热计数器的开关级设计

Design of ternary adiabatic counter on switch-level

为了降低多值逻辑电路的功耗,采用开关级设计技术设计一种新型三值绝热计数器.该方案以电路三要素理论为指导,并通过对多值计数器结构及工作原理的分析,分别推导出构成三值绝热计数器的三值绝热触发器、三值绝热正循环门、三值绝热进位电路的开关级函数表达式,利用具有不同阈值的NMOS管和交叉存贮型结构实现相应的电路.将所设计的计数器进行PSPICE模拟,结果表明,三值绝热计数器具有正确的逻辑功能及明显的低功耗特性.

A novel design of ternary adiabatic counter using switch-level design techniques was presented to reduce the power consumption of multi-valued logic circuits.First,by analyzing the working principles and structures of multi-valued counter,the switch-level functional expressions of ternary adiabatic counter which consists of flip-flop,loop operation circuit and carry circuit were derived under the guidance of Three Essential Circuit Elements theory.Then,the four bits ternary adiabatic counter can be realized further by using cross-memory structure and NMOS transistors with different thresholds.Finally,the proposed counter was simulated by PSPICE and the results show that it has correct logic function and distinctive low power dissipation.