SU913365A1 - Multifunctional logic module - Google Patents

Description

The invention relates to computing.

Known multifunctional module that implements the irrevocable logical functions of three or more variables p *

The disadvantage of this module is that it has a complex structure, which reduces its speed and reliability, increases the cost and impairs manufacturability.

The closest in terms of technological and functional essence to the invention is a multifunctional module that implements the gate functions of four variables, containing ¹⁵ five elements, two, two elements. COP NOT and two elements OR and having six inputs and one output [?.],

The disadvantage of the known module is that it has a complex structure, since it contains nine logic circuits.

The purpose of the invention is the determination of the module,

2

This goal is achieved by the fact that the multifunctional logic module containing three AND elements and the OR element contains the UNEMPLANITY element, the first input of which is connected to the input-module / second input connected to the output of the OR element, and the output - to the output of the module, the second input of which to the first inputs of the first ~ and second And elements, the third input to the second input of the first element Ii to the first input of the third element And, the fourth input to the third input of the first element And to the second input of the third element And, the fifth input to toromu input of the second AND gate and to the third input of the third AND gate, the sixth input - to the third input of the second AND gate and to the fourth input of the third element I.

The drawing shows a diagram

multifunctional logic module.

3 913365

- In the drawing, the following notation: the inputs of the module 1-6; elements And 7 ~ 9? the element OR 1Л; the element UNRALINATION 11; module output 12.

This module operates as follows.

The outputs of module 1-6 are supplied with variables X ^ -Hd, or their inversions, while, in accordance with the expression

'eat.

T - I ^ SA ^ A ^ AdX A2.A5 A _b A A 3A4A5 A ^ DA-D

BUT

Ay -A & - logical signals on

outputs 1-6 of the module so_ responsibly;

K - inequality function;

G is the logic function at the output of the module, the corresponding value of the irreversible logic function is removed from the output of the module for a particular set of variables X ^ -Hd.

The implementation of some irrevocable. functions on this module are presented in the table.

Variable value at module inputs Realizable function one 2 3 four 5 | 6

0 .0 Value at inputs not listed in the table Α3Α4Α5Α6 A1 = = A2 = A4 accept face values Α1 AZ (A5 V Ab) 0 A4 three input variables and their inversions A4 (AZ V А5А6) A4 0 Α1 V AZA5A6 A4 one A4 (AZ V A5 V Ab) one A4 A4 V AZ (A5 V Ab) one 0 AZ ν Λ4 ν A5 ν Ab one one (AZ V A4) (A5 V Ab) 0 one AZA4 ν А5А6 A1 = = A ~ 2 = A4 AZ V A4 V A5A6

Thus, the multipurpose logic module realizes all logic functions irrevocable ⁴⁵ tion of 4 variables and thus structurally simple, since it contains only five logic elements.

The latter significantly simplifies the production technology of such modules, since for a particular technology, simplification is significant (for MOS technology, the complexity is reduced from 30 to 21 MOS transistors), 5

The module has a higher speed, because it contains only three stages of information flow,

Claims (1)

Claim A multifunctional logic module containing three AND elements and an OR element, characterized in that, in order to simplify the module, it contains the UNEQUALITY element, whose first input is connected to the first module input, the second input is connected to the output of the OR element, and the output is connected to the module output whose second input is connected to the first inputs of the first and second And elements, the third input is connected to the second input of the first And element and to the first input of the third And element, the fourth 5 913365 ® the input is connected to the third input of the first element And, and to the second input of the third element And, the fifth input is connected to the second input of the second element And, and to the third input of the third element And, the sixth input is connected to the third input of the second element And and to the fourth input the third element I.