SU995301A1

SU995301A1 - Device for discriminating and forming pulses

Info

Publication number: SU995301A1
Application number: SU813340815A
Authority: SU
Inventors: Виталий Алексеевич Чистяков; Виктор Иванович Левинский
Original assignee: Предприятие П/Я А-7182
Priority date: 1981-09-28
Filing date: 1981-09-28
Publication date: 1983-02-07

Description

Изобретение относитс к игйпульсной технике и может быть использовано дл селекции импульсов эаданлой длительности и формировани импульсов, переменной длительности в устройствах различного назначени . The invention relates to a speed pulse technique and can be used for the selection of pulses with a duration of a pulse and the formation of pulses of varying duration in devices for various purposes.

Известно устройство дл селекции импульсов, например селектор импуль- сов по длительности, содержащий генератор импульсов, первый и второй элементы И и элемент ИЛИ (блок - 2 -ЗИ-2ИЛИ ), счетчик импульсов, два триггера, элемент запрета flj.A device for selecting pulses is known, for example, a pulse selector by duration, comprising a pulse generator, the first and second AND elements and the OR element (block - 2-ZI-2ILI), a pulse counter, two triggers, an inhibitor element flj.

данное устройство не пропускает импульсы, длительность которых меньше порога селектировани , а вьщел ет импульсы, длительность кото{х 1х равна или больше порога селектировани . В этом случае длительность выходного сигнала равн етс входному. Кроме того, в устройстве отсутствует возможность управлени длительностью выходных сигналовiThis device does not transmit pulses, the duration of which is less than the selection threshold, but does not transmit pulses that are {x 1x equal to or greater than the selection threshold. In this case, the duration of the output signal is equal to the input. In addition, the device does not have the ability to control the duration of the output signals.

Наиболее близким к предлагаемому по технической сущности вл етс селектор импульсов по длитель ности, содержащий первый триггер, первый счетчик импульсов, элемент НЕ, выход которого подключен к цепи сброс:а первого счетчика импульсов,,первыйThe closest to the proposed technical entity is a pulse selector with a duration that contains the first trigger, the first pulse counter, the element NOT, the output of which is connected to the reset circuit: the first pulse counter, the first

элемент И, первый вход которого соединен с входом элемента НЕ и вход- , ной шиной устройства, генератор импульсов , выход которого соединен с вторым входом первого элемента И, второй элемент И, первый вход которого соединен с выходом генератора импульсов,.второй триггер, у которого единич1Шй выход подключен квто10 рому входу второго элемента И, а нулевой вход подключен к пр мс 4у выходу первого триггера, третий элемент И, первый вход которого подключен к выходу элемента НЕ, второй вход the element And, the first input of which is connected to the input of the element NOT and the input- bus of the device, a pulse generator, the output of which is connected to the second input of the first element And, the second element And, the first input of which is connected to the output of the pulse generator, the second trigger, which one output is connected to the second input of the second element I, and the zero input is connected to the 4th output of the first trigger, the third element I, the first input of which is connected to the output of the element NO, the second input

15 подключен к инверсному выходу первого триггера, а выход подключен к единичному входу второго триггера, и : второй счетчик импульсов, вход которого подключен.к выходу второго эле20 мента И, а выход подключен к нулевому входу первого триггера, единичный вход которого подключен к выходу первого счетчика импульсов J.15 is connected to the inverse output of the first trigger, and the output is connected to the single input of the second trigger, and: the second pulse counter, the input of which is connected to the output of the second element I, and the output connected to the zero input of the first trigger, whose single input is connected to the output of the first pulse counter J.

Однако селектор импульсов по дли25 тельности имеет узкий диапазон селекции и,, кроме того, длительность его выходного сигнала равна длительности входного сигнала.However, the pulse selector has a narrow selection range and, moreover, the duration of its output signal is equal to the duration of the input signal.

Claims

The purpose of the invention is the expansion of 30 functional capabilities namely. expansion of the selection range and the formation of output pulses in duration. The goal is achieved by the fact that a device for selecting and forming pulses, containing a trigger, two pulse counters, an element AND, an element NOT and a pulse generator, the output of which is connected to the first input of the element AND whose output is connected to the counting input of the first pulse counter , the second input of the elements I is connected to the input bus and the input of the element NOT, the output of which is connected to the reset circuit of the first pulse counter, the single output of the trigger is connected to the output bus, the first and second elements of the first E groups of inputs are connected to the outputs of the first and second pulse counters, the second groups of inputs are connected to the first and second buses of the codes, the third input of the AND element is connected to the inverse output of the first comparison element, the direct output of which is connected to the counting input of the trigger, the reset input of which connected to the inverse output of the second element of the comparison, and the zero output of the trigger is connected to the reset circuit of the second pulse counter, the counting input of which is connected to the first input of the element I. In drawing n edstavlena block selection circuit of the device and pulse shaping. The device contains a pulse generator 1, a counter 2 and 3 pulses, an AND 4 element, a NOT 5 element, a trigger 6, a comparison elements 7 and 8, an input bus 9, a code 10 and 11 bus, and an output bus 12. The device for selecting and shaping pulses is working in the following way. In the initial state on the input bus 9, the input pulse is absent (zero level). The zero level of the input bus 9 blocks the element 4, as a result of which a zero level is set at its output. at the output of the element HE5, a high level, the COTO1ALM along the reset circuit, the counter 2 is held in the zero state. On bus 10, the binary code of the selection threshold is set, for example, on the inverse output of element 7, the unit level is single, and its output is zero level. At the unit output of trigger 6 and the output bus 12, the zero level, and at the zero output of the trigger b, the unit level, 1st through the reset circuit, keeps counter 3 in the zero state; on bus 11, the binary code of a given duration, for example. At the inverse output of element 8, a unit level that does not affect the reset input on trigger 6. At the output of generator 1, a repeating continuous pulse sequence that does not affect counters 2 and 3. When the input pulse arrives at the input bus 9 at the output the element NOT 5 appears zero level, which unlocks the counter 2 on the reset circuit, the generator 1 pulses through the element 4 will pass to the counting input of the counter 2. The counter 2 calculates them until a stroke value equal to two An identical selection code set on bus 10. When the input codes are equal, at the inverse output of element 7, the zero level appears, which overlaps the element 4, the output of the element appears to be a drop from the zero, single level, through which trigger b is set to a state in which a unit level appears at its single output and output bus 12. Thus, the leading edge of the output pulse is formed. At the same time, the zero output of the flip-flop 6po is a zero level, which allows the counter 3 to calculate the generator 1 pulses to the magnitude of the duration code set on bus 11. When comparing the codes, the inverse output of element 8 shows the zero level at which trigger b returns to its original a state, and on the output bus 12, a falling edge of the output pulse is formed. Counter 3 and item 8 are reset. At the end of the input pulse on the input bus 9 (Fig.), Element 5, counter 2 and element 7 return to the initial state. If an input pulse arrives whose duration is less than the value of the selection threshold code, the latter is not perceived by trigger 6, and the contents of counter 2 are reset by the end of the input pulse. . If at the time of formation of the final output pulse, i.e. When the trigger 6 is in state 1 and the counter 3 calculates the pulses of the generator 1, the next input pulse arrives on the input bus 9, the device simultaneously converts the duration of the next pulse to a number using the generator 1, element 4 and counter 2. Thus, the introduction of the comparison element 7 allows to expand the range of selection of the durations of the input pulses, the introduction of the 8 comparison allows to expand the range of the durations of the output pulses, as a result of which the functional capabilities of the device are expanded. At the same time, it became possible to programmatically change the selection code and the code of the output pulse duration. The use of the invented invention allows one to accomplish the task with a single device instead of a set of devices realizing the same task in parts (passing pulses of a given duration and generating an output pulse of the required duration). The invention The device for selection and generation of pulses, containing a trigger, two pulse counters, an element; and, an element NOT and a pulse generator, the output of which is connected to the first input of the element And whose output is connected to the counting input of the first pulse counter, the second input of the element And connected to the input bus and the input element NOT, the output of which is connected to the reset circuit of the first pulse counter, a single trigger output is connected to the output bus, characterized in that, in order to expand the functional possibilities devices, the first and second elements of the comparison are entered into it, the first groups of inputs of which are connected to the outputs of the first and second pulse counters, the second groups of inputs are connected respectively to the first and second codes, the third input of the AND element is connected to the inverse output of the first comparison element, the direct output of which is connected to the counting input of the trigger, the reset input of which is connected to the sepcHOKiy output. the second element of the comparison, and the zero output of the trigger is connected to the reset circuit of the second pulse counter, the counting input of which is connected to the first input of the element I. Sources of information, taking into account during the examination 1. USSR author's certificate 741447, cl. H 03 K 5/26, 02.03.78.

2. Authors certificate of USSR 746898, cl. H 03 K 5/26, 16.12.77 (prototype) ..