SU834848A1

SU834848A1 - Pulse train generator

Info

Publication number: SU834848A1
Application number: SU792811850A
Authority: SU
Inventors: Алексей Константинович Ваганов; Владилен Сергеевич Васильев; Владимир Израильевич Гордин
Original assignee: Предприятие П/Я А-7904
Priority date: 1979-08-30
Filing date: 1979-08-30
Publication date: 1981-05-30

Description

(54) ГЕНЕРАТОР СЕРИИ ИМПУЛЬСОВ(54) PULSE SERIES GENERATOR

1one

Изобретение относитс к импульсной технике и может быть использовано в измери-. тельной технике, в частности при исследовани х в области дерной физики, где дл проведени измерений необходимо иметь серию импульсов со стабильным периодом следовани . При этом первый импульс серии должен вырабатыватьс с высокой точностью прив зки к моменту прихода асинхронного стартового сигнала, а величина временного интервала между импульсами серии должна регулироватьс в широких пределах .The invention relates to a pulse technique and can be used in measuring. in particular in studies in the field of nuclear physics, where, in order to carry out measurements, it is necessary to have a series of pulses with a stable follow-up period. In this case, the first impulse of the series should be generated with high accuracy of reference by the time of arrival of the asynchronous starting signal, and the time interval between the impulses of the series should be regulated within wide limits.

Известен -енератор серии импульсов, содержащий генератор импульсов, устройство сравнени кодов, счетчик, внешнее запоминающее устройство, триггер, запускающий генератор, элемент 2 И-2ИЛИ-НЕ, формирователь тактовых импульсов, элементы И-НЕ 1.Known is the pulse train generator, which contains a pulse generator, a code comparison device, a counter, an external storage device, a trigger, a trigger generator, an AND-2OR-NE element 2, a clock pulse shaper, AND-NOT 1 elements.

Недостатком генератора вл етс достаточно больша сложность и отсутствие прив зки начала серии импульсов к асинхронному стартовому импульсу.The disadvantage of the generator is a rather large complexity and the absence of a reference to the beginning of a series of pulses to an asynchronous starting pulse.

Наиболее близким по технической сущности к предлагаемому изобретению вл етс генератор серии импульсов, содержащий генератор опорной частоты, элементы И, ИЛИ, счетчики импульсов, триггер 2..The closest in technical essence of the present invention is a pulse train generator comprising a reference frequency generator, AND, OR elements, pulse counters, trigger 2.

Недостатком этого генератора также вл етс отсутствие прив зки начала серии импульсов к асинхронному импульсу, что ведет в итоге к снижению надежности генератора .The disadvantage of this generator is also the absence of a reference to the beginning of a series of pulses to an asynchronous pulse, which ultimately leads to a decrease in the reliability of the generator.

Цель изобретени - повышение надежности генератора путем кривизны начала серии импульсов к асинхронному сигналу.The purpose of the invention is to increase the reliability of the generator by the curvature of the beginning of a series of pulses to an asynchronous signal.

Claims

This goal is achieved by the fact that in a pulse train generator, which contains a reference frequency generator, the output of which is connected to the first inputs of the first and second elements AND, the second inputs of which are connected respectively to the trigger outputs, the output of the first element AND is connected to the first input of the first pulse counter whose output is connected via the OR element to the first input of the second pulse counter, the recording input of which is connected to the recording input of the first pulse counter and to the recording bus; an additional OR element is added that forms The pulse controller and control trigger, whose input is connected to the first trigger input and the second pulse counter output, the second input of which is connected to the second input of the first AND element, to the first input of the additional OR element and through the pulse shaper to the second input of the OR element, the first input of which connected to the second input of an additional OR element, the output of which is connected to the second input of the first pulse counter, the output of the control trigger is connected to the third input of the second element AND, the output to expensively connected to the second trigger input. The drawing shows a structural diagram of a generator of a series of pulses. The pulse train generator contains the reference frequency generator 1, control trigger 2, AND 3 and 4 elements, trigger 5, pulse shaper 6, OR elements 7 and 8, pulse counters 9 and 10, asynchronous signal bus 11, write bus 12, output bus 13 The pulse train generator works in the following way. In the initial state, the reference frequency generator 1 continuously generates pulse signals. Triggers 2 and 5 are in the zero state, blocking, respectively, the second inputs elements 3 and 4 AND, as well as the counter 9 pulses through the element 7 OR and the counter 10 pulses. At the recording inputs of counters 9 and 10 (on the recording bus 12) there are codes that determine, respectively, the pulse period in the series and the number of pulses in the series. On the bus 11 and the bus 13 pulses are missing. When an asynchronous pulse is applied to bus 11, trigger 2 switches to one state, unlocking element 3 I. The first pulse that passes after an asynchronous pulse through element 3 from generator 1 switches trigger 1 to single state. In this case, element 3I is blocked, element 4A and counters 9 and 10 are unlocked. On bus 13 and counting input of counter 10, a pulse formed by shaper 6 is attached to an asynchronous pulse with an accuracy determined by the pulse period in generator 1. The counter 9 records the number corresponding to its period of pulses in the series, and the counter 10 records the number corresponding to the number of pulses in the series. Counter 9 counts the pulses arriving at its counting input from generator 1. At the moment when counter 9 counts down a given number of pulses and is set to zero, a signal appears at its output that is delayed in time relative to the first pulse of the series, which through element 8 OR comes to the pin 13 and the counting input of the counter 10, as well as through the element OR 7 to the input of the counter 9. In the counter 9 the number corresponding to the period of the pulses in the series is rewritten and he again starts counting the pulses received at his counting input from the generator Ator 1, etc. Counter 10 counts the output pulses (series pulses), arriving at its counting input. At the moment when the counter 9 counts a predetermined number of pulses, corresponding to the number of pulses in the series, and is set to the zero state, a pulse appears at its output, which switches the triggers 2 and 5 to the zero state. In this case, the element 3 And is blocked on the input and released on another input. At the same time, counters 9 and 10 are blocked. Thus, the pulse train generator returns to its original state, which will be maintained until the next asynchronous pulse arrives. In the proposed generator, due to the coupling of the beginning of a series of pulses to an asynchronous signal, the reliability of operation of the device is increased. The invention of the pulse train generator, comprising a reference frequency generator, the output of which is connected to the first inputs of the first and second elements AND, the second inputs of which are connected respectively to the trigger outputs, the output of the first element AND connected to the first input of the first pulse counter, the output of which is connected through the element OR to the first input of the second pulse counter I1 pulses, the recording input of which is connected to the recording input of the first pulse counter and to the recording bus, characterized in that, in order to increase reliability, into it In addition, the OR element, the pulse shaper and the control trigger, whose input is connected to the first trigger input and the second pulse counter output, the second input of which is connected to the second input of the first AND element, to the first input of the additional OR element, and through the pulse shaper to the second input of the element OR, the first input of which is connected to the second input of the additional element OR-, the output of which is connected to the second input of the first impulse counter, and the output of the control trigger is connected the third input of the second AND gate, whose output is connected to the second input flip-flop. Sources of information taken into account during the examination 1. USSR author's certificate No. 561284, cl. H 03 K 3/64, 1976.

2. USSR author's certificate number 661734, cl. H 03 K 3/64, 1977.