SU788378A1

SU788378A1 - Device for checking "1 from n" code

Info

Publication number: SU788378A1
Application number: SU792717885A
Authority: SU
Inventors: Александр Давидович Эпштейн; Анна Владимировна Хволес
Original assignee: Государственный научно-исследовательский институт теплоэнергетического приборостроения "НИИтеплоприбор"
Priority date: 1979-01-29
Filing date: 1979-01-29
Publication date: 1980-12-15

Description

(54) УСТРОЙСТВО КОНТРОЛЯ КОДА «1 ИЗ п(54) DEVICE CONTROL CODE "1 OF p

II

Изобретение относитс к автоматике и может быть использовано дл проверки дешифраторов , распределителей и др.The invention relates to automation and can be used to test decoders, distributors, etc.

Известно устройство, содержащее регистр кода операций, дешифратор, триггер четкости , элементы И, ИЛИ 1.A device is known that contains a register of an operation code, a decoder, a definition trigger, AND, OR 1 elements.

Недостаток устройства - значительные затраты оборудовани .The disadvantage of the device is a significant cost of equipment.

Наиболее близким техническим решением к предлагаемому вл етс устройство, содержаш.ее элементы И, ИЛИ, НЕ, в том числе п/з трехвходовых узлов выделени разрешенных комбинаций, кажда из которых соединена с предыдущей цепью обратной св зи, а выходы узлов с выходным элементом ИЛИ, выход цепи обратной св зи первого узла выделени через инвертор подключен к выходному элементу ИЛИ, причем в узле выделени разрешенных комбинаций входы первого и второго элемента ИЛИ подключены к входной клемме, второй вход первого элемента ИЛИ и вход третьего элемента ИЛИ ко второй клемме, вход четвертого элемента ИЛИ и второй вход второго элемента ИЛИ к третьей клемме, выходы первого и четвертого элемента ИЛИ соединены параллельно с собирательного элемента ИЛИThe closest technical solution to the present invention is a device containing AND, OR, NOT elements, including three-input three-input allocation nodes for allowed combinations, each of which is connected to the previous feedback circuit, and outputs of nodes with an output element OR , the output of the feedback circuit of the first selection node through an inverter is connected to the output element OR, and in the selection node of the allowed combinations, the inputs of the first and second element OR are connected to the input terminal, the second input of the first element OR and the third input of the OR gate to the second terminal, the fourth input of the OR element and the second input of the second OR gate to the third terminal, outputs of first and fourth OR gate connected in parallel with the collecting member OR

дл формировани сигнала обратной св зи и со входами выходного элемента И, а выходы второго и третьего элемента ИЛИ соединены с входами второго элемента И, причем вход цепи обратной св зи образован соединением свободных входов третьего и четвертого элемента ИЛИ 2.to form a feedback signal and with the inputs of the output element AND, and the outputs of the second and third element OR are connected to the inputs of the second element AND, the input of the feedback circuit is formed by connecting the free inputs of the third and fourth element OR 2.

Недостатки известного устройства - сложность и отсутствие возможности отключени контрол отсутсгви в коде сигнала «1.The disadvantages of the known device are the complexity and the inability to disable the monitoring of the absence of the signal in the code "1.

Цель изобретени - упрощение и расширение функциональных возможностей, заключающиес в контроле отсутстви единичных сигналов.The purpose of the invention is to simplify and extend the functionality, which is to control the absence of single signals.

Поставленна цель достигаетс тем, что в устройстве, содержащем п-2 элемента ИЛИ The goal is achieved by the fact that in the device containing p-2 elements OR

Claims

15 p - 1 elements AND, element OR-NOT, output element OR, whose inputs are connected to the outputs of the elements OR-NOT and AND, and the output is the output of the device, the inputs of the i-oro element OR are connected to the output of the i-1-th element OR and the input of the i + 1 th digit of the code i 2, p-2; the inputs of the first element OR are connected to the inputs of the first element AND and the inputs of the first and second bits of the code, and the output n-2nd with the first input of the element OR-NOT, the second input of which is connected to the control input of the device, and the third to the input n -th bit of the code, the inputs of the j-oro element AND are connected to the output j of the 1st element OR and the input Jf of the 1st bit of the code j 2, n-1. The drawing shows the scheme of the proposed code control device "1 of p for case n 5. The circuit contains two-input elements OR 1-3, a three-input element OR-NOT 4, input 5 controls the control mode; inputs 6-10 controlled code, two-input elements AND 11-14, multi-input element OR 15, output 16 of the device. The proposed control device code "1 of p works as follows. The controlled code (in this case, 5 bits) in parallel is fed to the inputs 6-10. If this code contains more than one "1, then the inputs of at least one of the elements 11-14 will match two signals 2, and the same signal will appear at the output of the element I, i.e. at the input of element 15 and, therefore, at its output 16. If there is only one signal "1 in the monitored code, none of the elements 11-14 will match and the signals" O will be present on their outputs. At the same time, at one of the inputs of element 4 there will be a signal “1, therefore at its output there will be a signal“ O. As a consequence, the output 16 of element 4, the signal "1 will be absent. In some cases, it is necessary to control the complete absence of "1" signals in the code being checked. In other cases, for example when monitoring gated decipherors, such a check should be excluded. With these requirements in mind, the proposed device has an input 5 for controlling the monitoring mode. If the signal “1” is applied to this input, then at the output of element 4, regardless of the code composition, the signal “O” is present and the device does not detect the absence of signals “1” in the monitored code. When the signal “O” is input to input 5, the device detects the absence of signals “2 in the monitored code, since in this case no signal“ 1 ”arrives at the inputs of element 4, and the signal“ 2 is transmitted from the output of element 4 to element 15 ” output 16. The inclusion of the monitoring mode “1” in the monitored code does not change the operation of the device: if there is only one “1 in the monitored code and if there is more than one“ 1 ”signal in it. Thus, the use of a smaller number of logic circuits and connections between them, the ability to disable the control of the absence of “1 in the controlled code provide simplified and expanded functionality. Claims A code control device "1 of p, containing p-2 of the OR element, p-1 of the AND element, the OR-NOT element, an output OR element, whose inputs are connected to the outputs of the OR-NOT and AND elements, and the output is the output of the device characterized in that, in order to simplify and extend the functionality involved in monitoring the absence of single signals, the inputs of the i-oro element OR are connected to the output of the i-1-element OR and the input i + 1-th of the code i 2, p-2; the inputs of the first element OR are connected to the inputs of the first element AND and the inputs of the first and second bits of the code, and the output of the n-2nd with the first input of the element OR-NOT, the second input of which is connected to the control input of the device, and the third to the input of n -th bit of the code, the inputs of the j-oro element AND are connected to the output j of the 1st element OR and the input J + the 1st digit of the code, n-1. Sources of information taken into account in the examination 1. USSR author's certificate number 408310, cl. G 06 F 11/00, 1972.

2. USSR author's certificate number 284040, cl. H 03 K 13/32, 1968.

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