SU888167A1

SU888167A1 - Device for transmitting information between two lines

Info

Publication number: SU888167A1
Application number: SU802898793A
Authority: SU
Inventors: Виктор Михайлович Кузавков
Original assignee: Научно-Исследовательский Институт Управляющих Вычислительных Машин
Priority date: 1980-03-21
Filing date: 1980-03-21
Publication date: 1981-12-07

Description

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Изобретение относитс к технике св зи и может быть использовано в дискретных ycTpoftcifBax автоматики и вычислительной техники.The invention relates to communication technology and can be used in discrete automation and computing technology.

Известно устройство дл приемопередачи информации, содержащее два усилител , три дифференциальных усилител и элемент, эквивалентный линии св зи Данное устройство приемопередачи позвол ет организовать взаимную приемопередачу дискретных сигналов в двух лини х св зи, так как в этом устройстве приемник сигналов с данной линии св зи не воспринимает сигналов своего передат-чика . Таким образом, соединение приемни-ков и передатчиковдвух линий . св зи в кольцо дл обеспечени взаимной приемопередачи не позвол ет логически сигналы в этом кольце замкнуть , таким образом, элемента пам ти не получаетс и схема нормально функционирует. Недостатком такой схемы вл етс ее сложность, как следствие низка надежность функционировани , так как содержитс большое число функциональных узлов (четыре усилител , шесть дифференциальных усилителей, два элемента, эквивалентных линии св зи). Кроме того.A device for transmitting information, containing two amplifiers, three differential amplifiers and an element equivalent to a communication line, is known. perceives the signals of his transmitter. Thus, the connection of receivers and transmitters is two lines. communication in a ring to ensure mutual transceiving does not allow the logical signals in this ring to close, so the memory element is not received and the circuit functions normally. The disadvantage of this scheme is its complexity, as a result of low reliability of operation, since it contains a large number of functional units (four amplifiers, six differential amplifiers, two elements, equivalent communication lines). Besides.

ввиду наличи большого числа дифференциальных усилителей, данна схема имеет их ограниченное быстродействие и худшие частотные характерис тики .due to the presence of a large number of differential amplifiers, this scheme has their limited speed and worst frequency characteristics.

Наиболее близким решением по техгнической сущности к изобретению вл етс устройство дл передачи информации , содержащее первый и вто10 рой усилители, выходы которых соединены с лини ми св зи и с входами соот.ветственно первого и второго элементов НЕ, и первый и второй элементы И-НЕ, выходы которых подключены The closest technical solution to the invention is a device for transmitting information, containing the first and second amplifiers, the outputs of which are connected to communication lines and inputs, respectively, of the first and second elements are NOT, and the first and second elements are NAND whose outputs are connected

15 соответственно к входам первого и второго магистральных усилителей f 2.15 respectively to the inputs of the first and second main amplifiers f 2.

Недостаток известных приемопередатчиков состоит в том, что они имеют ограниченные функциональные воз20 можности, так как не позвол ют организовать взаимную приемопередачу сигналов двух магистральных линий св зи.A disadvantage of the known transceivers is that they have limited functional capabilities, since they do not allow organizing the mutual transmitting of signals of two main communication lines.

Целью изобретени вл етс рас2 5 ашрение области применени устройства .The aim of the invention is to expand the field of application of the device.

Claims

This goal is achieved by the fact that the device for transmitting information between the communication lines, containing the first and second amplifiers -. the output of which is connected to the communication lines and to the inputs of the first and second elements NOT, respectively, and the first and second elements of AND-NOT, the outputs of which are connected respectively to the inputs of the first and second trunk amplifiers, a trigger is inserted whose outputs are connected to the first inputs of the NAND element, the output of the first element is NOT connected to the first input of the trigger and to the second input of the second NAND element, the output of the second ele is NOT connected to the second inputs of the trigger and the first NAND element. Functional diagram of the device shown in the drawing. The device contains the first 1 and second 2 amplifiers, the first 3 and second 4 lines, the first AND-NOT 5 and the second AND-PE 6 elements, the first NOT 7 and the second NOT 8 elements, trigger 9. To consider the operation of the device, we will do the following by withdrawing. The amplifiers 1, 2 have two outputs each, in the first state they have a low output resistance and close the lines 3, 4 to the ground, providing the potential of a logical zero in these lines. In the second state, the amplifiers 1, 2 have a high output impedance, which allows them not to affect the potential in lines 3. At this time, the potential of logical units is established in lines 3, 4 using matching circuits (not shown). or the potential of logical zero, if one of the subscribers working with this communication line transmits information. Since the communication lines work with subscribers in time division mode, only one subscriber can work with lines at a given time. In the next time interval, another subscriber is working, etc. Trigger 9 is a set trigger. Let it be a trigger, the first input of which is input R, and the second input - S. in the initial state with lines 3, 4, the subscribers do not work and in these lines the potential is set corresponding to a logical unit. The device works as follows. When a subscriber starts working with a communication line, for example, 3, a logical zero is set at the input of the element NOT 7, and a logical unit is formed at its output, which enters the input of the trigger 9. The trigger 9 switches to A logical zero, at its inverse output, a logical unit is formed, which causes the AND-NOT element to switch to a logical zero. This logical zero goes through amplifier 2 to the second link 4 to the subscribers of that line. The logical zero from the direct output of the trigger 9 enters the second input of the YPE 5 element, and blocks the passage of the logical unit from the output of the HE 8 element through this element, the output of the YPE 5 element remains the level of the logical unit, and amplifier 1 continues to remain in the state its output impedance is large, and it is actually disconnected from line 3. After the transmission of information in lines 3, 4 is completed, the potential of the logical unit is established, the device returns to its original state. The trigger 9 remains in the state in which it was in the last transmission. If the next subscriber transmitting the information is the subscriber of the first communication line 3, then the trigger 9 will continue to remain in the logical zero state. The process of transferring information from line 4 to line 3 is similar to that considered except for the difference that trigger 9 will be set to the state of a logical unit, and information will flow to line 3 through the element NOT 3, the element AND-NOT 5 and the amplifier 1; The proposed device allows an increase in the number of subscribers in the computing system so that if they were connected to one trunk line. Being simple in its circuit implementation, it allows for the exchange of information between a large number of subscribers with the minimum expenditure of machine time and equipment. Ultimately, the cost of processing discrete information is reduced. Formula of the Invention Device For transferring information between communication lines, comprising first and second amplifiers, the outputs of which are connected to the communication lines and the inputs of the first and second elements, respectively, and the first and second elements of AND-NOT, the outputs of which are connected respectively to the inputs of the first and second amplifiers / characterized in that, in order to expand the field of application of the device, a trigger is introduced into it, the outputs of which are connected to the first inputs of the AND-NES elements, the output of the first element is NOT connected to the first input of the trigger pa and to a second input of the second e tementa NAND ,. the output of the second element is NOT connected to the second inputs of the trigger and the first element NAND. Sources of information taken into account during the examination 1. USSR author's certificate in application No. 2682744, cl. G ABOUT 15/00, 1978.

2. Devices and control systems, 1976, No. 8, p. 11-13 (prototype).