SU1319020A1 - Polyfunctional logic module - Google Patents

Abstract

The invention relates to automation and computing and can be used to implement logic functions within a logic control system. The purpose of the invention is to simplify the module. Multifunctional logic module contains information inputs 1-4, reset input 5, counting input 6, counter 7, elements AND 8-12 elements OR 13-15, element 16, output 17. The setting signals received at the counter outputs belong to the set o , l, while the output of the module implements non-repetitive logical formulas of four letters, presented in the disjunctive normal form. 1 ill., 1 tab. co; 0

Description

The invention relates to automation and computing and is intended to be implemented by adjusting all logical formulas of four or less letters represented in the disjunctive normal form (DNF), with equal availability of direct and inverse sources of information and the possibility of rearrangement of input variables.

The purpose of the invention is to simplify the structure of the multifunctional module.

The drawing shows a diagram of a multifunctional module.

Multifunctional logic module contains information inputs 1--4, reset input 5, counting input 6, counter 7, elements AND 8-12, elements OR 13-15, element NOT 16 and output 17.

The module structure is described by a Boolean function of seven variables.

f (Z ,, ..., Z,) Z, Z5 + Z, Z, (ZjZ; + Zg) + + Z3Z, Z, + (Zj + Z,) Z ,,

and the variables Z, Z Z ,,, Z are supplied respectively to the first, second, third and fourth inputs of the module and are informational, the variables Z5, Zg, T.-J are removed from the corresponding outputs of the counter and are tuning.

The operation of the module in various tuning modes for realizing all types of non-repetitive logic functions specified in DNF of four or less letters with equal availability of direct and inverse outputs of information sources and the possibility of permutations of input variables is described in the table.

The module is configured to implement logical functions as follows.

A single pulse is applied to the reset input 5, which sets the counter 7 to its initial state. At the outputs Z, Z, 7, the counter Log.O. To configure the module to perform a certain logical function, the corresponding number of pulses must be applied to the counting input 6 of the module. The number of pulses y, to the counting input 6 of the module, depending on the type of logic function implemented by the module, given in DNF, is given in the table.

For example, you need to configure the module to perform a logic function.

f (X, X,) X, X.

The arithmetic polynomial characterizing the type of a given logical function is 2 + 1 + 1. In the table, the arithmetic polynomial of this type is given by number 4. First, a pulse is applied to the module 5 reset input, and then, according to the table, three pulses are applied to the counting input 6 of the module. In this case, the information input 1 of the module must be given a signal X, the input 2 is the signal X, the input 3 is the signal Xj, and the input 4 is the signal X. At the output 17 of the module a logical function will be obtained

f (X, X) X, X, X, X.

Similarly, you can implement any logical function defined by 25 in DNF of four or less variables.

Formula, from

p and e and

five

0

five

0

five

A multifunctional logic 0 module containing a counter, five

elements AND three elements OR, the first and second information inputs of the module are connected to the first and second inputs of the first element AND and the first element OR, the outputs of which are connected respectively to the first inputs of the second element OR and the second element AND whose output is connected to the first input The third element OR, the second and third inputs of which are connected to the outputs of the third and fourth elements AND, the first inputs of which are connected respectively to the first and second outputs of the counter, the third output of which is connected to the second input the second element is And, and the reset input of the counter and the counting input are connected to the reset input and the counting input of the module, the output of which is connected to the output of the third OR element, the fourth input of which is connected to the output of the fifth And element, the first and second inputs of which are connected to third and. the fourth module inputs, characterized in that, in order to simplify the module, it contains the element NOT, the third information input of the module is connected to the input element NO, the output

313190204

which is connected to the second input of the fourth element And the second input

the third element And the output of the first element And is connected to the second input

the second element OR is connected to the second output of the counter.

Editor A.Vorovich

SosTavi and O. Berezikova

Tehred M. Khodanich Proofreader I. Muska

Order 2513 / .43, Circulation 672: Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Production and printing company, Uzhgorod, Projecto st., 4

the second element OR is connected to the second output of the counter.

Claims (2)

Claim Multifunctional logic 30, a module comprising a counter, five AND elements and three OR elements, the first and second information inputs of the module being connected to the first and second inputs of the first AND element and 3 first OR elements, the outputs of which are connected respectively to the first inputs of the second OR element and the second AND element, the output of which is connected to the first input of the third OR element 0, the second and third inputs of which are connected to the outputs of the third and fourth AND elements, the first inputs of which are connected respectively to the first and second outputs of the counter45, the third output of which is connected to the second input of the second AND element, and the counter reset input and the counting input are connected to the reset input and the counting input of the module, the output of which is 5Q n with the output of a third OR gate, the fourth input of which is connected to the output of the AND pyatog.o first and second inputs of which are connected to third and. the fourth module inputs, characterized in that, in order to simplify the module, it contains an element NOT, and the third information input of the module is connected to the input of the element NOT, the output 1319020 4 of which is connected to the second input of the third element And, the output of the first element And is connected to the second input The number of pulses supplied to the inputs Counter inputs ² '[ ^y * 1 Y < g. 1 0 0 0 0 1 1 0 0 1 1 2 0 1 0 1 3 0 1 1 1 7 1 1 1 fourth element AND, second input the second OR element is connected to the second by the counter output. • G - G-F— ----—. · Representative Arithmetic type of DNF Exit 17 polynomial Z ₍ Z ₂ ζ _e z ₄ 4 Z | + z _t z, z 3 + 1 Z, Z ₂ + ZjZ ₄ 2 + 2 ζ, + ζ, + ζ, ζ. 2 + 1 + 1 Z ₍ + Z _t + Z, + Z ₄ 1 + 1 + 1 + 1