SU1348996A1 - Multifunction logical module - Google Patents

Abstract

The invention relates to a pulse technique and can be used to implement various logical functions of two, three, and four variables. The aim of the invention is to simplify the multifunctional logic module, expand its functionality and scope. The module contains three logical elements AND 1.1-1.3, three logical elements OR 2.1-2.3, a multichannel multiplexer, the inputs and outputs shown in the drawing. The goal is achieved by introducing a fourth input and the proposed connection of circuit elements. A multifunctional logic module allows you to implement all four possible threshold functions of four variables, as well as any logical function of one, two, and three input variables. 1 tab., 1 Il. J i (L / o: 00 with ω O5

Description

The invention relates to pulse technology and can be used to implement various logical functions of two, three, and four variables.

The purpose of the invention is to simplify, extend the functionality and scope.

The drawing shows a structural logic diagram of a multifunctional logic module.

The proposed multi-functional logic module contains three AND 1.1-1.3 logic elements, three OR 2.1-2.3 logic elements, multiplexer 3 (eight channels per one) with inputs 4-11 and output 12 and control inputs 13-15, which are respectively output and control inputs of the multifunction logic module, and four inputs 16-19.

An additional input 16 of the multifunctional logic module is connected to the first inputs of the AND 1.1-1.3 elements, the second inputs of which are connected respectively to the inputs 17-19 of the multi-functional logic module and simultaneously with the first inputs of the OR 2.1-2.3 elements respectively. The output of the AND 1.1 element is connected to the first information input 4 of multiplexer 3, the output of the AND 1.2 element is connected to the second input of the OR 2.1 element, the output of which is connected to the information inputs 5,6 and 8 of the multiplexer 3. The output of the AND 1.3 element is connected to the second input of the OR 2.2 element whose output is connected to informational inputs 7, 9 and 10 of the multiplexer.

The second input element OR 2.3 is connected to the input 16 of the multifunctional logic module, and the output - to the information input 11 of the multiplexer 3.

The proposed multi-functional logic module works as follows.

For the implementation of each of the possible output logic functions (in accordance with the truth table), input variables (argments) X, X are supplied to inputs 13-16, and the corresponding code set of control ones (1) and zero ( O) logical signals.

At variable values of the arguments at the inputs 13-16 (X;; X; X; X), depending on the fixed logic levels applied to the inputs 17-19, four different threshold functions are formed at the output of the 12 module (see table, 1 or more from 4 X ,, Xj + X X; 2 or

more of 4 X, X, + X X, h-X 3 or more of 4, + X, X X + XjXjX + X 4 of 4).

If same to inputs 13-16 instead

Since certain variables X are applied to constant (zero and single) logical potentials, then depending on the logical potentials applied to the inputs 17-19 at the output 12 of the module certain logical functions of one, two or three variables are formed (see table).

Thus, the multifunctional logic module allows Bf-e to implement four possible threshold functions of four variables, as well as any logical function of one, two, and three input variables Hbvx.

Claims (1)

Invention Formula Multifunctional logical a module containing the first, second and third elements of AND, the first, second and third elements of OR, a multiplexer (eight channels per one), the output and control inputs of which are respectively, the output and control inputs of the multifunctional logic module, the first, second and third inputs of the multifunctional logic module, characterized in that, in order to simplify, expand the functionality and application, it further comprises a fourth input, which is connected to the first inputs the first, second and third elements And, the second inputs of which are connected respectively to the first, second and third inputs of the multifunctional logic module and simultaneously with the first inputs of the corresponding but the first, second and third elements OR, the output of the first element AND is connected to the first information input of the multiplexer, the output of the second 31348996 element I is connected to the second input of the sixth and seventh information first element, the output of which is the multiplexer's bottom input, the second is connected to the second, third and fifth input of the third element OR is connected to the information inputs of the multiplexer the second input of the second OR element, the output of which is connected to the fourth by the fourth input of the multifunctional logic module, and the output with the eighth information input of the multiplexer. The truth and algorithm of the module settings X Xj Xj X, X Xj Xj- X. Order 5199/56 Circulation 899 Subscription VNIKLI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 the sixth and seventh information inputs of the multiplexer, the second input of the third element OR is connected with the fourth input is a multifunction X, Xj Xj + X „Xj X, + + X, X, X, X, X, X, X, Xj-bX, X, + X, X, -i-X, x, x, x ,, x.