SU673929A1

SU673929A1 - Device for obtaining frequency marks in panoramic electron-beam meters of frequency characteristics

Info

Publication number: SU673929A1
Application number: SU772538857A
Authority: SU
Inventors: Михаил Васильевич Долганов
Original assignee: Предприятие П/Я Г-4115
Priority date: 1977-11-01
Filing date: 1977-11-01
Publication date: 1979-07-15

Description

1one

Изобретение относитс к радиоизмерительной технике.This invention relates to a radio measuring technique.

Известно устройство дл формировани частотных меток, содержащее формирователь пр моугольных импульсов, четыре дифференцирующих цепи, два ждущих мультивибратора , триггер и схему совпадени . Принцип действи этого устройства заключаетс в том, что из синусоидального сигнала качающейс частоты формируют пр моугольные импульсы длительности, равной половине периода качающейс частоты , каждый импульс сравнивают по длительности с импульсом эталонного ждущего мультивибратора и в случае их равенства формируют импульс частотной метки 1. Недостатками этого устройства вл ютс сложность получени перестраиваемой частотной метки и определени ее частоты, низкочастотность .A device for generating frequency marks is known, comprising a square pulse shaper, four differentiating circuits, two multivibrators waiting, a trigger and a matching circuit. The principle of operation of this device is that of a sinusoidal sweeping frequency signal form rectangular pulses of duration equal to half the period of the sweeping frequency, each pulse is compared in duration with the pulse of the reference standby multivibrator and, if they are equal, generate a pulse of frequency tag 1. Disadvantages of this device are the difficulty of obtaining a tunable frequency tag and determining its frequency, low frequency.

Наиболее близким по технической сущности к изобретению вл етс устройство формировани частотных меток, содержажащее генератор опорных частот, логические элементы И и ИЛИ, делители частоты, формирователи 2.The closest in technical essence to the invention is a device for the formation of frequency labels, containing a reference frequency generator, logic gates AND and OR, frequency dividers, drivers 2.

Недостатком данного устройства вл етс возможность формировани ложных меток , что приводит к снижению точности.The disadvantage of this device is the possibility of forming false labels, which leads to a decrease in accuracy.

Целью изобретени вл етс повышение точности путем подавлени ложных меток.The aim of the invention is to improve accuracy by suppressing false labels.

Поставленна цель достигаетс тем, что в устройство формировани частотных меток , содержащее логический элемент И, один вход которого соединен с входом сброса управл емого делител частоты и с выходом делител частоты, а другой вход - с выходом управл емого делител частоты , введены дополнительный логический элемент И и триггер, входы которого соединены с входами основного логического элемента И, а выход подключен к первому входу дополнительного логического элемента И, выходом подключенного к информационному входу управл емого делител частоты .The goal is achieved by the fact that the device contains a logical element AND, one input of which is connected to the reset input of the controlled frequency divider and the output of the frequency divider, and the other input is connected to the output of the controlled frequency divider. and a trigger, the inputs of which are connected to the inputs of the main logic element AND, and the output is connected to the first input of the additional logic element AND, the output connected to the information input of the controlled case tel frequency.

Структурна электрическа блок-схема описываемого устройства приведена на чертеже .The structural electrical block diagram of the described device is shown in the drawing.

Claims

The device contains an AND 1 logic element, a controlled frequency divider 2, divide, d frequency 3, an additional logical element AND 4, trigger 5. Bus signal has a sweeping frequency, bus 7 is a reference signal. The principle of operation of the device is as follows. The signal with the best frequency comes from the bus 6 through the frequency divider 3 to the reset input of the controlled divider 2 frequencies, the input of the logic element AND 1 and the trigger input 5. The trigger is set by the falling edge of the pulses with the swing: its frequency in such a state that permits the passage of the reference frequency f through the logic element AND 4 to the counting input of frequency divider 2. When the first pulse appears at the output of the frequency divider, the trigger overturns and prohibits the further passage of the reference signal through logic element 4 on the divide Only frequencies, i.e., the possibility of having false frequency labels and frequencies multiple of the frequency of the label is excluded. . Apparatus of the Invention A device for obtaining frequency labels in electron-beam panoramic frequency response meters, comprising an AND logic element, one input of which is connected to a reset input of a controlled frequency divider and an output of a frequency divider, and another input of a logic element AND is connected to an output of a controlled frequency divider, by the fact that, in order to increase accuracy, an additional logical element AND and a trigger are introduced into it, the inputs of which are connected to the inputs of the main logic element AND, and Exit is connected to a first input of an additional AND gate whose output is connected to the data input of the controllable frequency divider. Sources of information taken into account in the examination I. USSR author's certificate No. 331317, cl. G 01 R 1300, 08.08.72.

2. For Japan Japan No. 51-11509, cl. 11 OK 12, 12.04.76.