SU847504A1

SU847504A1 - Device for obtaining difference frequency of pulses

Info

Publication number: SU847504A1
Application number: SU792705807A
Authority: SU
Inventors: Валентин Викторович Климов
Original assignee: Институт Горного Дела Министерствачерной Металлургии Cccp
Priority date: 1979-01-04
Filing date: 1979-01-04
Publication date: 1981-07-15

Description

(54) УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ РАЗНОСТНОЙ ЧАСТОТЫ ИМПУЛЬСОВ(54) DEVICE FOR OBTAINING DIFFERENCE FREQUENCY OF PULSES

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Изобретение относитс к импульсной технике и может быть использовано в системах автоматизации, измерительных приборах, в микроэлектронике.The invention relates to a pulse technique and can be used in automation systems, measuring devices, in microelectronics.

Известно устройство дл получени разностной частоты импульсов, содержащее четыре формировател , элементы И и триггеры 1. Недостатком этого устройства вл етс его сложность.A device for obtaining a difference pulse frequency is known, which contains four formers, And elements and triggers 1. The disadvantage of this device is its complexity.

Наиболее близким техническим решением к изобретению вл етс устройство дл получени разностной частоты импульсов содержащее RS-триггер, первый и второй входы с подключенными к ним соответственно первым и вторым триггерами со счетным входом, вход тактовой частоты 2.The closest technical solution to the invention is a device for obtaining a difference pulse frequency containing an RS flip-flop, the first and second inputs with the first and second triggers with a counting input, respectively, input clock frequency 2.

Недостатком известного устройства также вл етс его сложность, обусловленна использованием двух элементов И, двух элементов ИЛИ, элемента НЕ, формировател импульсов, блока запоминани и блока запрета .A disadvantage of the known device is also its complexity, due to the use of two AND elements, two OR elements, an NOT element, a pulse shaper, a memory unit and a prohibition unit.

Цель изобретени - повышение надежности работы устройства.The purpose of the invention is to increase the reliability of the device.

Поставленна цель достигаетс тем, что в устройство дл получени разностной частоты импульсов, содержащее первый и второй счетные триггеры, счетные входы которых вл ютс входами устройства, RS-триггер , введены три последовательно соединенных коммутатора, причем вход коммутации первого коммутатора соединен с шиной тактовой частоты, его второй вход подключен к входу сброса RS-триггера, и входу установки в ноль второго счетного триггера, первый выход второго коммутатора подключен к входу установки нул первого счетного триггера, первый вход третьего коммутатора вл етс выходом устройства, а второй выход подключен к входу установки RS-триггера, причем входы управлени трех . коммутаторов соединены порознь соответственно с выходом второго счетного тригге5 ра, первого счетного триггера и выходом RS-триггера.This goal is achieved by the fact that the device for receiving the difference pulse frequency, containing the first and second counting triggers, the counting inputs of which are the device inputs, the RS flip-flop, includes three serially connected switches, and the switching input of the first switch is connected to the clock frequency bus, its second input is connected to the reset input of the RS flip-flop, and the setup input to zero of the second counting trigger, the first output of the second switch is connected to the input setup zero of the first counting trigger, the first The third input of the third switch is the output of the device, and the second output is connected to the input of the RS-flip-flop setup, with control inputs three. switches are connected separately, respectively, with the output of the second counting trigger, the first counting trigger, and the output of the RS flip-flop.

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

Устройство дл получени разностной частоты импульсов содержит шины 1 и 2, A device for obtaining a difference pulse frequency comprises busses 1 and 2,

Claims

20 which are connected to a sequence of pulses, with frequencies Ft and F2, respectively, bus 3 pulses of the clock frequency, output bus 4, on which pulses with frequency F Fi-Fj are formed, triggers 5 and 6 with a counting input, RS flip-flop 7, switches 8, 9 and 10 with memorization of the control signal. The device works as follows. In the initial state, when there are no pulses on buses 1 and 2, triggers 5, 6 and 7 are in the zero state, the clock pulses on bus 3 switch 8 arrive at the input of switch 9 and its output that is not used in this device. The condition of the device. F Consider the case of the frequency ratio F 3FjL. Thus, bus 1 receives three pulses for each incoming pulse to bus 2. First pulse on bus 1-st first pulse on bus 2 triggers triggers 5 and 6 to unit state. The first pulse on bus 3 is switched through switch 8 to input "setting zero of trigger 6, sets it to state zero and set trigger 7 also to state zero. The second pulse on bus 3 is switched through switches 8 and 9 to the input "setting zero of trigger 5 and resets it to zero, and also through switch 10 switches trigger 7 to one. The second pulse on bus 1 again switches the trigger 5 to the state of one, but the next pulse after bus 3 again passes through the switches 8 and 9 to the input “setting the zero of the trigger 5 and switches it to the zero state. The same impulse is switched through switch 10 to output bus 4. The third impulse on bus 1 again triggers trigger 5, after which the impulse from bus 3 again commutes to output bus 4. Thus, two impulses go to output bus 4, i.e. the difference between the number of pulses fed to buses 1 and 2. Formula of the invention A device for obtaining a differential frequency of pulses comprising first and second counting triggers whose counting inputs are device inputs, RS trigger, characterized in that operation reliability, three serially connected switches are entered into it, the switching input of the first switch is connected to the clock frequency bus, its second output is connected to the reset input of the RS flip-flop and the installation input to zero of the second counting trigger, the first output of the second switch is connected to the input of the zero setting the first counting trigger, the first output of the third switch is the output of the device, and the second output is connected to the setup input of the RS flip-flop, and the control inputs of the three switches are connected separately Correspondingly, with the output of the second counting trigger, the first counting trigger and the output of the RS trigger. Sources of information taken into account during the examination 1. USSR author's certificate No. 526072, cl. H 03 K 5/20, 11.05.75.

2. USSR author's certificate number 508921, cl. H 03 K 5/156, 06.26.74 (prototype).