Realization method of 27 three-valued single-variable functions based on single resistive variable device

Abstract

The invention discloses a method for realizing 27 kinds of three-value single-variable functions based on a single resistive variable device. The method adopts a memristor, sets three resistance states of the memristor according to the resistance value of the memristor, and defines the memristor The logic parameters of the initialization of the resistor, the input and output of the memristor, and the output of the memristor after the write operation, and the positive scanning voltage and the negative scanning voltage are respectively applied to the memristor in the semiconductor parameter analysis tester to obtain the memristor. The two threshold voltages of the resistance-state conversion of the resistor, based on the threshold voltage, determine the amplitude of the pulse voltage of the memristor input with a pulse width of 100 microseconds and a constant DC voltage, and then initialize according to the three-valued univariate function to be realized After the memristor reaches the corresponding resistance state, the three-valued univariate function can be realized by performing one or two-step write operations on the memristor; the advantage is that the operation method is simplified, the number of devices is greatly reduced, the circuit area is reduced, and the circuit power is reduced. Consumption, increase the circuit storage capacity.

Description

technical field [0001] The invention relates to a method for realizing univariate functions, in particular to a method for realizing 27 kinds of ternary univariate functions based on a single resistance variable device. Background technique [0002] In circuit design, the univariate function f (x) is frequently used as a means to realize some digital functions. In three-valued logic, the univariate function f The variable x of (x) has three values ​​of 0, 1 and 2, that is, x∈{0,1,2}, corresponding to different values ​​of x, when x=0, the univariate function f The output value of (x) is C 0 , C 0 = f (0), when x=1, univariate function f The output value of (x) is C 1 , C 1 = f (1), when x=2, the univariate function f The output value of (x) is C 2 , C 2 = f (2), where, C 0 ∈{0,1,2},C 1 ∈{0,1,2},C 2 ∈{0,1,2}. According to the records in Wu Xunwei's "Multi-valued Logic Circuit Design Principles", in three-valued logic, 27 different univariate functions can be...

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Problems solved by technology

The existing memristor-based univariate function implementation method mainly uses semiconductor parameter analyzers (such as B1500 or 4200A) to cooperate with 2 to 4 memristors, and this method requires 4 to 6 steps to realize the univariate function operation (where the write operation occupies 3 to 5 steps), and only 8 kinds of single-variable functions can be realized, which has the disadvantages of high delay and slow switching speed, resulting in defects such as large area, high power consumption and low storage capacity of the designed circuit

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