SU855977A1

SU855977A1 - Device for delaying square-wave pulses

Info

Publication number: SU855977A1
Application number: SU792829974A
Authority: SU
Inventors: Виктор Александрович Фомичев; Александр Викторович Фомичев
Original assignee: Тульский Ордена Трудового Красного Знамени Политехнический Институт
Priority date: 1979-10-16
Filing date: 1979-10-16
Publication date: 1981-08-15

Description

Изобретение относится к радиотехнике и может быть использовано в устройствах вычислительной и измерительной техники,The invention relates to radio engineering and can be used in devices of computing and measuring equipment,

Известно устройство для задержки прямоугольных импульсов [1].A device for delaying rectangular pulses [1].

Недостаток этого устройства - низкая точность восстановления длительности задержанного импульса при дли тельности задержки меньше длительности задерживаемого импульса.The disadvantage of this device is the low accuracy of restoring the delayed pulse duration with a delay duration shorter than the delayed pulse duration.

Известно также устройство для за держки прямоугольных импульсов, содержащее блок задержки фронта, инвертор, генератор импульсов, формирующий триггер [2]·It is also known a device for delaying rectangular pulses containing a block delay front, inverter, pulse generator, forming a trigger [2] ·

Недостаток такого устройства сложность схемы и следовательно невысокая надежность.The disadvantage of such a device is the complexity of the circuit and, therefore, low reliability.

Цель изобретения - повышение надежности .The purpose of the invention is to increase reliability.

Поставленная цель достигается тем, что в устройство для задержки прямоугольных импульсов, содержащее первый блок задержки фронта импульса, инвертор, генератор тактовых импульсов, формирующий триггер, введен второй блок задержки переднего фронта импульса, вход которого через инвертор подключен ко входу устройства и входу первого блока задержки фронта, выход которого подключен к единичному входу формирующего триггера, к нулевому входу которого подключен выход второго блока задержки фронта, а генератор тактовых импульсов подключен к соответствующим входам обоих блоков задержки фронта, при этом блок задержки выполнен в виде последовательно соединенных триггера, элемента 2И и счетчика, выход переполнения которого подключен ко второму входу триггера и выходу блока задержки, а ко второму входу элемента 2И подключен генератор тактовых импульсов.This goal is achieved by the fact that in the device for the delay of rectangular pulses containing the first block of the delay of the pulse front, an inverter, a clock pulse generator that forms a trigger, a second delay block of the leading edge of the pulse is introduced, the input of which through the inverter is connected to the input of the device and the input of the first delay block edge, the output of which is connected to a single input of the forming trigger, the output of the second block of the edge delay is connected to the zero input, and the clock generator is connected to the corresponding inputs of both front delay units, while the delay unit is made in the form of a series-connected trigger, element 2I and a counter, the overflow output of which is connected to the second input of the trigger and the output of the delay unit, and a clock generator is connected to the second input of element 2I.

На чертеже представлена схема устройства.The drawing shows a diagram of the device.

855977 4 'ки фронта; Т~- период следования тактогых импульсов.855977 4 'front cues; T ~ is the period of succession of such pulses.

Подбором частоты следования импульсов генератора тактовых импульсов обеспечивается требуемая точность задержки импульсов.The selection of the pulse repetition rate of the clock generator provides the required accuracy of the pulse delay.

Claims

The invention relates to radio engineering and can be used in computing and measuring devices. A device for delaying rectangular pulses is known. The disadvantage of this device is the low accuracy of restoring the delayed pulse duration when the delay duration is less than the length of the delayed pulse. It is also known a device for delaying rectangular pulses, comprising a front delay block, an inverter, a pulse generator, which forms a trigger 2j. The disadvantage of such a device is the complexity of the circuit and therefore not reliability. The purpose of the invention is to increase reliability. The goal is achieved by the fact that the device for delaying rectangular pulses, containing the first pulse delay unit, inverter, clock generator, trigger formation, introduces a second pulse front delay unit, the input of which through the inverter is connected to the device input and the first input the front delay block, the output of which is connected to a single input of the forming trigger, to the zero input of which the output of the second front delay block is connected, and the clock pulse generator is connected to corresponding to the lean inputs of both front-end delay blocks, with the delay block made in the form of a serially connected trigger, element 2I and a counter, the overflow output of which is connected to the second input of the trigger and the output of the delay block, and a clock generator is connected to the second input of element 2I. The drawing shows a diagram of the device. The device consists of front delay blocks 1 and 2, inverter 3, a clock pulse clock 4 and a shaping trigger 5. The first front delay block consists of trigger 6, element 2 and 7 and counter 8, and the second, respectively, of trigger elements 9, element 2and 10, counter P. Delay device operates as follows. In the initial state, all devices are in the zero state. A rectangular impulse by the front enters the input of the device: the trigger 6 of the front delay unit 1 into a single circuit, which opens element 2I 7. From the 4-clock generator, through the opened AND 7 element, the clock pulses arrive at the totalizer input of the counter 8. Overflow pulse the counter 8 simultaneously returns the trigger 6 to the initial zero state and converts the shaping trigger 5 to the single state. Analogously, the decay of the input pulse inverted by the inverter 3 translates the trigger 9 of the pulse decay delay block into a single state and through the opened element 10 clock; the pulses fill the block counter 11: delays, an overflow pulse from the output of the counter 1I translates trigger 9 and fop 4 and trigger trigger 5 to zero zero. Thus, as a result of a double reversal of the forming trigger 5, at its direct output it forms a delayed rectangular pulse. The delay time t 2 TQ, n is the size of the counters 8 and 1 I bh.okov of the front delay; the period of the follow-up pulses. By selecting the pulse frequency of the clock generator, the required pulse delay accuracy is ensured. Claim 1. A device for delaying rectangular pulses, comprising a first block of the leading edge of an impulse, an inverter, a clock generator, generating a trigger, characterized in that, in order to increase reliability, a second block of the leading edge of the impulse is inserted into it, which is connected to the unit input of the forming trigger, to the zero input of which the output of the second pulse edge delay block is connected, and the clock pulse generator is connected to the corresponding inputs of both blocks for handles. 2. The device according to claim 1, characterized in that the delay unit is executed in the form of serially connected trigger, element 2I and counter, the overflow output of which is connected to the second input of the trigger and output of the delay unit, and the second pulse generator is connected to the second input of element 2I . Sources of information taken into account during the examination 1. USSR author's certificate No. 271566, cl. H 03 K, 1970.

2. USSR author's certificate number 535727, cl. H 03 K 5/13 ,, 1976.

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