SU556430A1 - Multifunctional logic module - Google Patents

Description

The invention relates to the field of automation and computer technology and telemechanics, intended to create a high-speed response when implementing all the diametrical Boolean functions of four time and some Boolean functions in five and six variables, can be used in the design of digital computers, automation and remote control, where the speed plays a crucial role.

There is a universal logic module containing five input and two output external outputs, having NO elements, nine AND elements, two OR elements and realizing any function of three variables and some functions of four and five variables when combining the inputs and feeding the constant inputs “Oh and“ 1.

A controlled function module is known that contains five input and two output external terminals, having NO elements, seven AND elements, an OR element that implements any function of three variables and some functions of four and five variables when the logical variables are fed to its inputs. and inverse phases.

A disadvantage of the known devices is the impossibility for a single module to implement all non-repetitive Boolean functions of four variables that are widely used in the synthesis of discrete automata, and large signal delays, due to the large depth of the multifunctional element, which reduces the speed and reliability of devices synthesized based on known elements and devices.

The closest technical solution to the invention is a multifunctional

0 logic module containing eleven AND elements and OR element. In addition, the well-known module contains five input and one external output pins, two two-input, three three-input and four-input AND elements, two NOT elements, three-input and two-input OR elements, which implements all non-repeating Boolean functions of four variables with the appropriate settings.

0 The disadvantage of this device is the large signal delay, which explains the large depth of the multifunctional element circuit, which results in the speed and reliability of devices synthesized based on the known elements of the device.

The aim of the invention is to improve the speed of the module. The goal is achieved by the fact that

0 the first input of the module is connected to the inputs of the first, second, third, eighth, two and tenth elements of AND, the second input - with the inputs of the first, fourth, fifth, eighth and eleventh elements of AND, the third input - with the inputs of the sixth, seventh, the eighth, tenth and eleventh elements I. The fourth input is connected to the inputs from the first to the seventh and tenth elements of AND, the fifth input to the inputs of the second, fourth, sixth, ninth and eleventh elements of AND, the sixth input to the inputs the third, fifth, seventh, ninth and eleventh element I. The outputs from the first to the eleventh AND elements are connected to the inputs of the first OR element, the OR element output is connected to the module output.

The drawing shows a diagram of the multifunctional logic module.

The multi-functional logic module consists of input external outputs 1-6, output external output 7, ten three-input elements 8-17 and one four-input element P1 18, element OR 19.

The circuit elements of the module are connected as follows. The first external input pin 1 is connected to the elements 8, 9, Yu, 15, 16, 17; the second external input pin 2 - with elements 8, I, 12, 15, 18: the third external input pin 3 - with elements 13, 14, 15, 17, 18; fourth input outer: 4 output terminal elements 8-14, 17; the fifth external input terminal 5 - with the elements 9, 11, 13, 16, 18; the sixth input outer terminal 6 - with elements 10, 12, 14, 16, 18. The outputs of elements 8-18 through element 19 are connected with the output external terminal 7.

On the output of the outer output 7 implements the functions

F: XiX. ,, / XzJC Xu / ,, / X, X ,,. V

Have

where the variables Xi, Kg, KS, 4, x-, le correspond to the input signals at the external input terminals 1, 2, 3, 4, 5, 6, respectively.

The table lists the settings that allow you to get any type of all non-repetitive boolean functions of four variables. All other non-repetitive boolean functions can be obtained from these ten generic functions by inverting and permutations.

Thus, a multifunctional logic module that implements all non-repetitive four-variable Boolean functions is a device whose shallow depth of circuit provides the minimum signal delay, and therefore allows you to build high-speed devices with sufficiently high reliability. The use of a multifunctional logic module with the smallest possible number of false leads allows a reduction in the number of types of integrated circuits, complexity, and hardware costs in the design of discrete devices.

Claims (1)

Invention Formula A multifunctional logic module containing eleven AND elements and an OR element, characterized in that, in order to increase the speed of the module, the first input of the module is connected to the inputs of the first, second, third, eighth, ninth and tenth elements of the And, the second input of the module is connected to the inputs of the nerve, the fourth, fifth, eighth and eleventh elements And, the third input of the module is connected to the inputs of the sixth, seventh, eighth, tenth and eleventh elements And, the fourth input of the module is connected to the inputs from the first to the seventh and tenth elements And, the fifth input of the module connected to the inputs of the second, fourth, sixth, ninth and eleventh And elements, the sixth input of the module is connected to the inputs of the third, fifth, seventh, ninth and eleventh And elements, outputs from the first to the eleventh AND elements are connected to the inputs of the first OR element, the OR element output is connected to the module output.