SU809036A1

SU809036A1 - Device for finding the middle of a time interval

Info

Publication number: SU809036A1
Application number: SU792741964A
Authority: SU
Inventors: Эдуард Евгеньевич Нестеров
Original assignee: Nesterov Eduard E
Priority date: 1979-03-26
Filing date: 1979-03-26
Publication date: 1981-02-28

Description

Изобретение относится к- радиотехнике и может быть использовано в автоматике и измерительной технике.The invention relates to radio engineering and can be used in automation and measurement technology.

Известно устройство, содержащее счетчик ,RS-триггер, элемент И, генератор и переписывающий блок [1]. 5A device is known that contains a counter, an RS trigger, an AND element, a generator, and a rewriting unit [1]. 5

Недостаток известного устройства — его сложность, так как оно содержит переписывающую схему и счетчик с усложненной входной логикой каждого разряда для записи внешнего кода во все разряды.A disadvantage of the known device is its complexity, since it contains a rewriting circuit and a counter with complicated input logic of each digit for writing external code to all digits.

Цель изобретения — упрощение устрой- Ю ства.The purpose of the invention is to simplify the device.

Для достижения указанной цели в устройство для определения середины временного интервала,- содержащее счетчик, выход которого соединен с первым входом RS-триггера, второй вход которого соединен с входной шиной, выход RS-триггера соединен с первым входом элемента И, второй вход которого соединен с генератором, введен делитель частоты и коммутатор, выход которого соединен с входом счетчика, а входы 20 подключены к выходу элемента И, причем первый вход непосредственно, а второй — через делитель частоты, управляющий вход коммутатора соединен с входной шиной.To achieve this goal, the device for determining the middle of the time interval, containing a counter, the output of which is connected to the first input of the RS-trigger, the second input of which is connected to the input bus, the output of the RS-trigger is connected to the first input of the element And, the second input of which is connected to generator, introduced a frequency divider and a switch, the output of which is connected to the input of the counter, and the inputs 20 are connected to the output of the element And, the first input directly and the second through a frequency divider, the control input of the switch is connected to running tire.

На чертеже представлена функциональная схема предлагаемого устройства.The drawing shows a functional diagram of the proposed device.

Устройство содержит шину 1 входную, RS-триггер 2, генератор 3 тактовых импульсов, элемент И 4, Т-триггер 5, коммутатор 6, счетчик 7 и шину 8 выходную.The device comprises an input bus 1, an RS-trigger 2, a clock pulse generator 3, an I 4 element, a T-trigger 5, a switch 6, a counter 7, and an output bus 8.

Работает устройство следующим образом Анализируемый интервал времени в виде электрического импульса поступает через шину 1 на вход RS-триггера 2 и на управляющий вход коммутатора 6, при этом RS-триггер 2 устанавливается в положение, при котором элемент И 4 пропускает импульсы генератора 3 на вход коммутатора 6. Коммутатор 6 пропускает импульсы на счетчик 7 с выхода Т-триггера 5, которые следуют с частотой (F—частота тактовых импульсов генератора 3 на входе Т-триггера 5). Таким образом, за время действия анализируемого интервала времени на счетчике 7 запишется число После прекращения действия импульса, определяемого анализируемым интервалом времени, коммутатор 6 установится в положение, при котором на вход счетчика 7 поступают импульсы генератора 3 непосредственно с выхода элемента И 4 с частотой F. В таком положении устройство находится до переполнения счетчика 7. Импульс переполнения счетчика 7 поступит на шину 8 и одновременно установит RS-триггер 2 в исходное состояние, при котором прекратится поступление импульсов с генератора 3 через эле- 5 мент И 4 на счетчик 7. При емкости счетчика 7, равной N, его переполнение выражается соотношением N =^--^ + t F, где t — время между окончанием анализируемого интервала и моментом переполнения счетчика 7. Это соотношение может быть пред- ^!° ставлено в виде $ + t, что указывает на постоянство времени задержки между серединой анализируемого временного интервала и моментом переполнения счетчика 7The device operates as follows. The analyzed time interval in the form of an electric pulse is fed through bus 1 to the input of the RS-trigger 2 and to the control input of the switch 6, while the RS-trigger 2 is set to the position in which the And 4 element passes the pulses of the generator 3 to the input of the switch 6. The switch 6 passes the pulses to the counter 7 from the output of the T-trigger 5, which follow with a frequency (F is the frequency of the clock pulses of the generator 3 at the input of the T-trigger 5). Thus, during the duration of the analyzed time interval on the counter 7, the number is written. After the termination of the pulse determined by the analyzed time interval, the switch 6 is set to the position at which the pulses of the generator 3 directly from the output of the element And 4 with the frequency F. In this position, the device is located until the counter 7 overflows. The counter 7 overflow pulse will arrive on bus 8 and at the same time set the RS-trigger 2 to its initial state, at which the flow will stop pulses from generator 3 through element 5 and 4 to counter 7. With counter capacity 7 equal to N, its overflow is expressed by the ratio N = ^ - ^ + t F, where t is the time between the end of the analyzed interval and the moment of counter overflow 7 This ratio may be pre- ^! ° is set in the form $ + t, which indicates the constancy of the delay time between the middle of the analyzed time interval and the moment of counter overflow 7

Применение предлагаемого устройства позволит создавать простые и надежные системы, определяющие или измеряющие параметры импульсов.The application of the proposed device will allow you to create simple and reliable systems that determine or measure the parameters of the pulses.

Claims

The invention relates to radio engineering and can be used in automation and measurement technology. A device is known that contains an .KZ-trigger counter, an And element, a generator and a rewriting unit 1. The disadvantage of the known device is its complexity, since it contains a rewriting circuit and a counter with complicated input logic of each bit for writing the external code to all bits. The purpose of the invention is to simplify the device. To achieve this goal, a device for determining the middle of the time interval - containing a counter, the output of which is connected to the first input of the RS flip-flop, the second input of which is connected to the input bus, the output of the RS-flip-flop is connected to the first input of the And element, the second input of which is connected to a generator, a frequency divider and a switch are inputted, the output of which is connected to the counter input, and the inputs are connected to the output of the element I, the first input directly and the second through a frequency divider, the control input of the switch is connected to running tire. The drawing shows a functional diagram of the device. The device contains a bus 1 input, RS-flip-flop 2, a generator of 3 clock pulses, element 4, T-flip-flop 5, switch 6, counter 7 and bus 8 output. The device operates as follows. The analyzed time interval in the form of an electrical impulse enters through pin 1 to the input of RS-flip-flop 2 and to the control input of switch 6, while RS-flip-flop 2 is set to the position where element 4 transmits impulses of generator 3 to input switch 6. Switch 6 transmits pulses to the counter 7 from the output of the T-flip-flop 5, which follow with a frequency (F-frequency of the clock pulses of the generator 3 at the input of the T-flip-flop 5). Thus, during the time of the analyzed time interval, the counter 7 will record the number. After the pulse, defined by the analyzed time interval, ceases, the switch 6 is set to the position where the generator 3 comes directly from the output of the And 4 element at a frequency F The device is in this position until the counter overflows 7. The overflow pulse of the counter 7 arrives on the bus 8 and at the same time sets the RS flip-flop 2 to its original state, which will stop Pulses from generator 3 through AND 4 to counter 7. With counter 7 having a capacity equal to N, its overflow is expressed as N tF, where t is the time between the end of the analyzed interval and counter overflow moment 7. This ratio can be represented as -f + t, which indicates the constancy of the delay time between the middle of the analyzed time interval and the moment of overflow of the counter 7 The use of the proposed device will allow you to create simple and reliable systems that determine or measure the parameters mpulsov. The invention The device for determining the middle of the time interval containing the counter, the output of which is connected to the first input of the RS flip-flop, the second input of the KOTOpojo is connected to the input width, the output of the trigger is connected to the first input of the And element, the second input of which is connected to the generator, characterized In order to simplify the device, a frequency divider and a switch are introduced into it, the output of which is connected to the counter input, and the inputs are connected to the output of the AND element, the first input being directly and the second through the frequency divider The switch's control input is connected to the input bus. Sources of information taken into account in the examination i. USSR Author's Certificate No. 509862, cl. G 04 F 10/04, 1974 (prototype).