Threshold-arithmetic Algebraic System and Design of Multiple-valued CMOS Circuits
Yao Mao-qun① Zhang Guan-zhi① Shi Jin-he②
①(School of Information Science and Engineering, Hangzhou Normal University, Hangzhou 310018, China) ②(Department of Information & Electronic Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract：Based on the characteristics of current-mode circuits, which can easily realize arithmetic operations, the threshold-arithmetic operation and the nonnegative operation are defined in this paper, and the threshold-arithmetic algebraic system suitable to design current-mode circuits is established. Then, HE map is defined and used as the graphic representation of threshold-arithmetic functions, and the method of converting traditional logic function to threshold-arithmetic function with HE map is expounded. Finally, the design method of current-mode CMOS circuits based on threshold-arithmetic algebraic system and HE map is proposed. The HSPICE simulation results using TSMC 0.18 μm technology show that the designed current-mode CMOS circuits have the correct logic functions. The threshold-arithmetic algebraic system is a new simple and effective method for designing the current-mode circuits.
2012, Vol. 34 
