Design Of Current Mode CMOS Circuit Based On HE Map And Function Decomposition Algorithm

Compared with voltage-type circuits,current-type circuits have greater advantages in frequency band,speed,bandwidth,power consumption and so on,which is also a major direction of current research on integrated circuits.Simultaneously,CMOS tube can effectively process the current signal,and has the advantages of low static power consumption and strong anti-interference ability.Therefore,current-mode CMOS circuits have also received widespread attention at home and abroad.In addition,the threshold arithmetic algebra system is an algebra system that fully complies with the characteristics of current signal operation.Using it to design a current-mode CMOS circuit is more intuitive,simple and efficient,and the designed circuit has a simple structure,low power consumption and fast speed.Based on the above reasons,this paper focuses on the design of current mode CMOS circuits based on threshold arithmetic algebra.The main research contents are as follows:1.Propose a HE map conversion method.Through the idea of solving equations,the process of transforming a HE map into a threshold arithmetic function is algebraized,which is simple and efficient.Many literatures basically obtain the HE map by constructing the similar HE map,and then performing complex threshold arithmetic operations,transforming them into threshold arithmetic algebra.The threshold arithmetic functions obtained by such conversion methods are more complex,so that the corresponding circuit structure becomes complex and tedious.2.Using the HE map conversion method,design the basic operation circuit based on current CMOS circuit,including NAND gate,NOR gate,XOR gate and XOR gate,and design data selector and full adder based on current CMOS circuit Through simulation experiments,they show that their power consumption is 263.3 ?w and 206.4 ?w,which are several orders of magnitude lower than the power consumption of general voltage-type circuits.3.A new three-variable function decomposition algorithm is proposed.First,allthree-variable functions are classified into simple functions and complex functions.Secondly,a method of the HE map transformation is proposed,and the desired threshold arithmetic function is obtained by transforming the position of the value of the HE map.Finally,through the proposed HE map transformation method,combined with the operation of the threshold arithmetic function,the current-mode circuits of simple functions and complex functions are completed,so as to realize all three-variable functions.Simulation experiments prove that the algorithm is correct and effective and the designed circuit has a simple structure and low power consumption.In addition,through a lot of calculations and experiments,all the threshold arithmetic functions of simple functions are made into a table,which is convenient for future look-up tables.4.A new n-variable function decomposition algorithm is proposed,which can convert n-variable functions into three-variable functions,and the algorithm is fully applicable to threshold arithmetic algebra systems.Compared with the n-variable function decomposition algorithm in other literatures,the new algorithm has simple and fast steps.Simulation experiments show that the algorithm can be effectively applied to the implementation of n-variable functions based on current-mode CMOS circuits,and the effect is excellent.