SU1274137A1

SU1274137A1 - Device for checking pulse sequence

Info

Publication number: SU1274137A1
Application number: SU843760766A
Authority: SU
Inventors: Рубен Иосифович Осепян
Original assignee: Предприятие П/Я А-1251
Priority date: 1984-07-06
Filing date: 1984-07-06
Publication date: 1986-11-30

Abstract

Изобретение относитс к импульсной технике и может быть использовано в системах цифровой св зи. Цель изобретени - повьшение достоверности контрол периодической последова (руг.; тельности импульсов путем обеспечени возможности распознавани контролируемого сигнала помехи. Дл достижени этой цели в устройство дополнительно вредены генератор 5 импульсов , элементы И 6, 7 и 8, элемент НЕ 9, элемент ИЛИ 10, элемент задержки 1 1 . Кроме того, устрО1 1Ство содержит шину 1 начальной установки исходного состо ни , счетчик 2 импульсов , дешифратор 3, триггер 4, шины: входную 12, выходную 13..Устройством формируетс контрольный сигнал при пропуске импульса в периодической последовательности импульсов. 1 з.п. ф-лы, 2 ил. ND viThe invention relates to a pulse technique and can be used in digital communication systems. The purpose of the invention is to increase the reliability of monitoring of a periodic sequence (alternatively, pulse performance by enabling recognition of a monitored disturbance signal. To achieve this goal, an impulse generator 5, elements 6, 7, and 8, element 9, element 10, are damaged in the device delay element 1 1. In addition, the Device 1 STA contains bus 1 of the initial installation of the initial state, counter 2 pulses, decoder 3, trigger 4, bus: input 12, output 13 ... A control signal is formed during the transmission a periodic pulse in the pulse sequence. ZP 1 f-ly, 2 yl. ND vi

Description

Изобретение относится к импульсной технике и может быть использовано в системах цифровой связи для выдачи сигнала при пропуске импульса в периодической последовательности импульсов.The invention relates to a pulse technique and can be used in digital communication systems to issue a signal when a pulse is missed in a periodic pulse sequence.

Целью изобретения является повышение достоверности контроля периодической последовательности импульсов за счет получения возможности распознавания контролируемого сигнала и помехи.The aim of the invention is to increase the reliability of control of a periodic sequence of pulses due to the possibility of recognition of a controlled signal and interference.

На фиг. 1 представлена функциональная схема устройства для контроля последовательности импульсов; на фиг. 2 - временные диаграммы, поясняющие его работу.In FIG. 1 is a functional diagram of a device for monitoring a pulse sequence; in FIG. 2 is a timing diagram explaining its operation.

Устройство контроля последова•тельности импульсов содержит шину 1 начальной установки исходного состояния, последовательно соединенные счетчик 2 импульсов и дешифратор 3, триггер 4, генератор 5 импульсов, первый, второй и третий элементы И 6, 7 и 8, элемент НЕ 9, элемент ИЛИ 10, элемент задержки 11, входную шину 12 и выходную шину 13, причем первый вход триггера 4 соединен с входной шиной 12, с первым входом первого . элемента Иби через элемент НЕ 9 с первым входом второго элемента И 7, второй вход которого подключен к первому выходу генератора 5 импульсов, второй выход которого соединен с вторым входом первого элемента И 6. выход которого подключен к первому входу элемента ИЛИ 10, второй вход которого соединен с выходом второго элемента И 7 и с первым входом третьего элемента И 8, второй вход которого подключен к выходу дешифратора 3, а выход третьего элемента И 8 соединен с выходной шиной 13, при этом шина 1 начальной установки подключена к третьему входу элемента ИЛИ 10, выход которого через элемент задержки 11 соединен с установочным входом генератора 5 импульсов и с вторым входом триггера 4, первый и второй выходы которого подключены соответственно к входу генератора 5 импульсов и к установочному входу счетчика импульсов 2, счетный вход которого подключен к третьему выходу генератора 5 импульсов.The pulse sequence control device contains • a bus 1 for initial setting of the initial state, a pulse counter 2 and a decoder 3, a trigger 4, a pulse generator 5, the first, second and third elements AND 6, 7 and 8, element NOT 9, element OR 10 , the delay element 11, the input bus 12 and the output bus 13, and the first input of the trigger 4 is connected to the input bus 12, with the first input of the first. the Ibi element through the element NOT 9 with the first input of the second element And 7, the second input of which is connected to the first output of the pulse generator 5, the second output of which is connected to the second input of the first element 6. The output of which is connected to the first input of the element OR 10, the second input of which connected to the output of the second element And 7 and to the first input of the third element And 8, the second input of which is connected to the output of the decoder 3, and the output of the third element And 8 is connected to the output bus 13, while the initial installation bus 1 is connected to the third input of the element nt OR 10, whose output through the delay element 11 is connected to the installation input of the pulse generator 5 and to the second input of the trigger 4, the first and second outputs of which are connected respectively to the input of the pulse generator 5 and to the installation input of the pulse counter 2, the counting input of which is connected to the third the output of the generator is 5 pulses.

Генератор 5 импульсов содержит опорный генератор 14, триггер 15,первый, и второй элементы И 16, 17, при1274137 чем вход опорного генератора 14 соединен с входом генератора 5 импульсов, а выход опорного генератора 14 подключен к первым входам первого и 5 второго элементов И 16, 17 и триггера 15, второй вход которого соединен с установочным входом генератора 5 импульсов, а первьй и второй выходы триггера 15 подключены к вторым входам первого и второго элементов И 16, 17 соответственно, выходы которых соединены соответственно с первым и вторым выходами генератора 5 импульсов .The pulse generator 5 contains a reference generator 14, a trigger 15, the first and second elements And 16, 17, when 1274137 than the input of the reference generator 14 is connected to the input of the pulse generator 5, and the output of the reference generator 14 is connected to the first inputs of the first and 5 second elements And 16 , 17 and trigger 15, the second input of which is connected to the installation input of the pulse generator 5, and the first and second outputs of trigger 15 are connected to the second inputs of the first and second elements And 16, 17, respectively, whose outputs are connected respectively to the first and second outputs of the generator 5 pulses.

>5 Устройство для контроля последовательности импульсов работает следующим образом.> 5 A device for controlling the pulse sequence operates as follows.

Импульс с шины 1 начальной установки через элемент ИЛИ 10 и элемент 20 задержки 11 устанавливает триггеры 4 и 15 в нулевое состояние. Сигнал с прямого выхода триггера 4 запрещает работу генератора 5 импульсов и опорный генератор 14 импульсы не выраба25 тывает. Сигнал с инверсного выхода устанавливает счетчик 2 импульсов в нулевое состояние.The pulse from the bus 1 of the initial installation through the element OR 10 and the element 20 of the delay 11 sets the triggers 4 and 15 to zero. The signal from the direct output of trigger 4 prohibits the operation of the pulse generator 5 and the reference pulse generator 14 does not work25. The signal from the inverse output sets the counter 2 pulses to zero.

II

При поступлении на входную шину 12 неискаженной достоверной последова3® тельности импульсов (фиг. 2а,I) триггер 4 устанавливается в единичное состояние (фиг. 26), разрешающее генерирование импульсов опорным генератором 14 (фиг. 2в) и счет импульсов на 3S входной шине 12 счетчиком 2 импульсов.When an undistorted reliable pulse sequence (Fig. 2a, I) arrives at the input bus 12 (trigger 2), the trigger 4 is set to a single state (Fig. 26), which allows the generation of pulses by the reference generator 14 (Fig. 2c) and the pulse count on the 3S input bus 12 2 pulse counter.

Опорный генератор 14 формирует первый импульс на своем выходе с задержкой, равной половине длительности импульса на входной шине 12 устройства, причем частота формируемых им импульсов должна быть в два раза выше частоты импульсов контролируемой Последовательности. Импульсы с выхода опорного генератора 14 поступают на счет45 ный вход триггера 15 и входы элементов И 16, 17. Триггер 15 работает в счетном режиме, его выходной сигнал имеет частоту в два раза меньшую,чем импульсы на его входе. Напряжения с 50 прямого и инверсного выходов триггера 15 поступают на другие входы элементов И 16, 17, на выходах которых формируются импульсы (фиг. 2 г,д), имеющие частоту следования в два ра55 _За меньшую опорной, смещенные друг относительно друга на период следования опорных импульсов. Так как в исходном состоянии триггер 15 находитз 1274 ся в нулевом состоянии, импульсы на выходе элемента И 16 или на первом выходе генератора 5 импульсов (фиг. 2г) опережают импульсы на выходе элемента И 17 или на втором выходе гене- $ ратора 5 импульсов (фиг. 2д) на период следования опорных импульсов. Прохождение импульсов с первого выхода генератора 5 импульсов через элемент И 7 (фиг. 2ж) запрещается конт- ю ролируемым сигналом, инвертируемым элементом НЕ 9 (фиг. 2е), а импульсов с второго выхода генератора 5 импульсов через элемент И 6 (фиг.2и) сигналом с входной шины 12.The reference generator 14 generates a first pulse at its output with a delay equal to half the pulse duration on the input bus 12 of the device, and the frequency of the pulses generated by it should be twice the frequency of the pulses of the controlled Sequence. The pulses from the output of the reference generator 14 are fed to the counting input of the trigger 15 and the inputs of the elements 16, 17. The trigger 15 operates in the counting mode, its output signal has a frequency two times lower than the pulses at its input. Voltages from 50 direct and inverse outputs of trigger 15 are applied to the other inputs of elements And 16, 17, the outputs of which are generated pulses (Fig. 2 g, e) having a repetition rate of two times 55 _Z and a lower reference, offset from each other by a period following reference pulses. Since the trigger 15 is in the initial state 1274 in the zero state, the pulses at the output of the element And 16 or at the first output of the generator 5 pulses (Fig. 2d) are ahead of the pulses at the output of the element And 17 or at the second output of the generator 5 pulses ( Fig. 2e) for the period following the reference pulses. The passage of pulses from the first output of the 5 pulse generator through the And 7 element (Fig. 2g) is prohibited by the controlled signal, the inverted element HE 9 (Fig. 2e), and pulses from the second output of the 5 pulse generator through the And 6 element (Fig. 2i ) signal from the input bus 12.

При появлении в контролируемой последовательности паузы большей 1,5 где Т_о - период импульсов, формируемых опорным генератором 14, что свидетельствует об окончании контроли- jo руемой последовательности, на выходе элемента И 7 вырабатывается импульс (фиг. 2ж), который через элемент ИЛИ 10 (фиг. 2к) и элемент задержки 11 устанавливает устройство в ис- 25 ходное состояние.When a pause of more than 1.5 appears in the controlled sequence, where Т _о is the period of pulses generated by the reference generator 14, which indicates the end of the controlled sequence, an impulse is generated at the output of element And 7 (Fig. 2g), which through the OR element 10 (Fig. 2k) and delay element 11 sets the device to its initial state.

Если количество импульсов в контролируемой последовательности и, следовательно, количество импульсов опорного генератора 14 соответствует за- jq данному, то на выходе дешифратора 3 формируется сигнал (фиг. 2л), разрешающий прохождение через элемент И 8 импульса с выхода элемента И 7 на выходную шину 13 устройства (фиг. 2м), подтверждающий достоверность контро-· ³³лируемой импульсной последовательности.If the number of pulses in a controlled sequence and, therefore, the number of pulses of the reference oscillator 14 corresponds to the given jq, then a signal is generated at the output of the decoder 3 (Fig. 2l), which allows the pulse to pass through the And 8 element from the output of the And 7 element to the output bus 13 device (Fig. 2m), confirming the reliability of the controllable ³³ pulse sequence.

Если количество импульсов в контролируемой последовательности не соответствует заданному, то сигнал на выходной шине 13 не формируется.If the number of pulses in the controlled sequence does not match the specified one, then the signal on the output bus 13 is not formed.

Элемент задержки 11 обеспечивает задержку установки устройства в исходное состояние до окончания импульса на выходной шине 13.The delay element 11 provides a delay in the initialization of the device until the end of the pulse on the output bus 13.

При поступлении на входную шину 12 искаженной последовательности импульсов, т.е. при уменьшении паузы в ней (фиг. 2а, II), устройство работает аналогично, но при наличии помехи сигнал формируется на выходе элемента И 6 (фиг. 2и) и через элемент ИЛИ 10 (фиг. 2к) и элемент задержки 11 устанавливается устройство в исходное состояние. При этом из-за установки счетчика 2 импульсов в исходное состояние после каждой помехиWhen received on the input bus 12 of the distorted sequence of pulses, i.e. by reducing the pause in it (Fig. 2a, II), the device works similarly, but in the presence of interference, a signal is generated at the output of the And 6 element (Fig. 2i) and through the OR element 10 (Fig. 2k) and the delay element 11 the device is installed in the initial state. Moreover, due to the installation of the counter 2 pulses in the initial state after each interference

137 >4 импульс, подтверждающий достоверность контролируемой импульсной последовательности, на выходной шине 13 отсутствует.137> 4 pulse, confirming the reliability of the controlled pulse sequence, on the output bus 13 is absent.

Возможны и другие варианты выполнения генератора 5 импульсов, например, - генератор импульсов с периодом следования контролируемой последовательности импульсов, на втором выходе которого формируются импульсы с задержкой, равной половине периода контролируемой импульсной последовательности.Other embodiments of the 5 pulse generator are possible, for example, a pulse generator with a period of following a controlled pulse sequence, at the second output of which pulses are generated with a delay equal to half the period of the controlled pulse sequence.

Claims

The invention relates to a pulse technique and can be used in digital communication systems to emit a signal when a pulse is passed in a periodic sequence of pulses. The aim of the invention is to increase the reliability of monitoring a periodic sequence of pulses due to the possibility of recognizing a monitored signal and interference. Fig. 1 is a functional diagram of the device for controlling a pulse sequence; in fig. 2 - time diagrams that show his work. The device for controlling the sequence of pulses contains the bus 1 of the initial installation of the initial state, a pulse pulse counter connected in series 2 and a decoder 3, a trigger 4, a pulse generator 5, the first, second and third elements AND 6 7 and 8, the element 9, the element OR 10 And the input element, the input bus J2 and the output bus 13, the first input of the trigger 4 is connected to the input bus 12, with the first input of the first element And 6 and through the element 9 with the first input of the second element And 7 whose second input is connected to the first generator output 5 pulses The second output of which is connected to the second input of the first element AND 6 whose output is connected to the first input of the element OR 10, the second input of which is connected to the code of the second element And 7 and to the first input of the third element AND 8, the second input of which is connected to the output of the decoder 3, and the output of the third element AND 8 is connected to the output bus 13, while the bus 1 of the start of installation is connected to the third input of the element OR 10, the output of which through the delay element 11 is connected to the installation input of the pulse generator 5 and to the second input of the trigger 4, first and second outputs of which are connected with the responsibility to the input pulses and the oscillator 5 and the entry to the mounting sche snip pulses 2, koto cerned count input connected to the third output of the n generators of 5 pulses. . The pulse generator 5 contains a reference generator 14, a trigger 15, a first, and a second element AND 16, 17, wherein the input of the reference generator 14 is connected to the input of the generator 5 pulses, and the output of the reference generator 14 is connected to the first inputs of the first and second elements And 16 , 17 and the trigger 15, the second input of which is connected to the installation input of the generator 5 pulses, and the first and second outputs of the trigger 15 are connected to the second inputs of the first and second elements And 16, 17, respectively, the outputs of which are connected respectively to the first and second outputs of the generator 5 mpulsov. The device for controlling the pulse sequence operates in the following manner. The impulse from the initial setting bus 1 through the element OR 10 and the delay element Y sets the triggers 4 and 15 to the zero state. The signal from the direct output of the trigger 4 prohibits the operation of the generator of 5 pulses and the reference generator 14 does not emit pulses. The signal from the inverse output sets the counter 2 pulses to the zero state. Upon receipt of an undistorted, reliable pulse train (Fig. 2a, 1) on the input bus 12, trigger 4 is set to one (Fig. 26), enabling the generator, pulsing the reference generator 14 (Fig. 2c) and pulse counting on the input bus 12 counter 2 pulses. The reference generator 14 generates the first pulse at its output with a delay equal to half the pulse duration on the input bus 12 of the device, and the frequency of the pulses generated by it must be twice the frequency of the pulses of the monitored sequence. The pulses from the output of the reference generator 14 are fed to the counting input of the trigger 15 and the inputs of the elements 16, 17. The trigger 15 operates in the counting mode, its output signal has a frequency two times smaller than the pulses at its input. The voltages from the direct and inverse outputs of the trigger 15 are supplied to other inputs of the elements AND 16, 17, at the outputs of which pulses are formed (Fig. 2 g, e), having a tracking frequency two times lower than the reference one, shifted relative to each other during the following period reference pulses. Since in the initial state the trigger 15 finds 3 s in the zero state, the pulses at the output of the element 16 or at the first output of the generator of 5 pulses (fig. 2d) are ahead of the pulses at the output of the element 17 and at the second output of the generator of the 5 pulses ( Fig. 2d) for the period of the reference pulses. The passage of pulses from the first output of the generator 5 pulses through element I 7 (Fig. 2g) is prohibited by controlled signals, the inverted element is NOT 9 (Fig. 2e), and the pulses from the second output of the generator 5 pulses through element 6 (Fig. 2i) a signal from the input bus 12. If a pause greater than 1.5 T appears in the controlled sequence, where T "is the period of pulses generated by the reference generator 14, which indicates the end of the controlled sequence, the output of the And 7 element produces a pulse (Fig. 2g) which through eleme NT 10 (Fig. 2k) and the delay element 11 sets the device to its initial state. If the number of pulses in a controlled sequence and, consequently, the number of pulses of the reference generator 14 corresponds to a given one, then a signal is generated at the output of the decoder 3 (Fig. 2n), allowing the pulse from the output of the And 7 element to the output bus 13 of the device (Fig. 2m), confirming the reliability of the monitored-pulse sequence. If the number of pulses in the monitored sequence does not match the set, then no signal is generated on the output bus 13. The delay element 11 provides a delay in setting the device to its initial state until the end of the pulse on the output bus 13. When a distorted pulse sequence arrives at the input bus 12, i.e. when the pause in it is reduced (Fig. 2a, II), the device operates in the same way, but if there is interference, a signal is generated at the output of the AND 6 element (Fig. 2i) and through the OR 10 element (Fig. 2k) and the delay element 11 is set in initial state. At the same time, due to the installation of the counter 2 pulses to the initial state after each interference 137 4 a pulse confirming the reliability of the monitored pulse sequence is absent on the output bus 13. Other embodiments of the pulse generator 5 are possible, for example, a pulse generator with a period of the controlled pulse sequence, at the second output of which pulses are formed with a delay equal to half the period of the controlled pulse sequence. Claim 1. A device for controlling a pulse train containing a series-connected pulse counter and a decoder, an input and output bus, an initial installation bus, characterized in that, in order to increase the reliability of control, a pulse generator, three elements AND, an element, NOT hurt ment OR, the delay element and the trigger, the first input of which is connected to the input bus, with the first input of the first element AND and through the element NOT - c. the first input of the second element And, the second input of which is connected to the first output of the pulse generator, the second output of which is connected to the second input of the first element AND, the output of which is connected to the first input of the OR element, the second input of which is connected to the output of the second element And and to the first input of the third elements, the second input of which is connected to the output of the decoder, and the output of the third element is connected to the output bus, while the initial installation bus is connected to the third input of the OR element, the output of which is through the rear element rzhki connected to the input of the pulse generator installation and the second input latch, the first and second outputs which are respectively connected to the input of the pulse generator and the mounting Valid pulse counter, the counting input of which is connected to. the third output of the pulse generator.

2. The device according to p. I, which is so that the pulse generator contains two elements And, the trigger and the reference generator, the input

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which is connected to the input of the pulse generator, and the output of the reference generator is connected to the first inputs of the first and second elements I and the trigger, the second input of which is connected to s by the installation input of the generator im37.

pulses, and the first and second outputs of the trigger are connected to the second inputs of the first and second elements And, respectively, the outputs of which are connected respectively to the first and second outputs of the pulse generator.

but

Faye. 2