SU924722A1

SU924722A1 - Differentiating device

Info

Publication number: SU924722A1
Application number: SU802995950A
Authority: SU
Inventors: Геннадий Георгиевич Реутский; Григорий Иванович Гайдай; Виктор Борисович Винокуров
Original assignee: Предприятие П/Я А-7162
Priority date: 1980-10-20
Filing date: 1980-10-20
Publication date: 1982-04-30

Description

II

Изобретение относитс кавтоматике и аналоговой вычислительной технике ..The invention relates to automatics and analog computing.

Известны устройства, основанные на вычитании задержанного сигнала из незадержанного, одно из которых содержит два блока скольз щего усреднени работающие со сдвигом во времени , и блок вычитани tl3.Devices are known that are based on subtracting a delayed signal from an unloaded one, one of which contains two moving averaging units operating with a time shift, and a subtracting unit tl3.

Недостаток данного устройства низка динамическа точность и невозможность дифференцировани огибающей амплитудно-модулированного сигнала .The disadvantage of this device is low dynamic accuracy and the impossibility of differentiating the envelope of an amplitude-modulated signal.

Наиболее близким по технической сущности к предлагаемому вл етс дифференцирующее устройство, содержащее элемент .задержки и сумматор, соответствующие входы которого соединены с входом устройства и с вы ,ходом элемента задержки Г21.The closest in technical essence to the present invention is a differentiating device containing a delay element and an adder, the corresponding inputs of which are connected to the input of the device and to you, the course of the delay element G21.

Недостаток известного устройства состоит в невозмо)хности работы сA disadvantage of the known device is the impossibility of working with

амплитудно-модулированными сигналами .amplitude modulated signals.

Цель изобретени - расширение области применени за счет дифференцировани сигналов посто нного тока и огибающей амплитудно-модулированных сигналов.The purpose of the invention is to expand the field of application by differentiating the DC signals and the envelope of the amplitude modulated signals.

Указанна цель достигаетс тем, что дифференцирующее устройство, содержащее элемент задержки и сумма10 тор, причем вход элемента задержки и первый .суммирущий вход сумматора . соединены с входом устройства, содержит усилитель, nepeключateль, ,j фильтр несущей частоты и пороговый элемент, при этом выход элемента задержки через переключатель св зан с вычитающим входом сумматора и с входом усилител , выход которого соединен с. вторым суммирующим входом This goal is achieved by the fact that a differentiating device containing a delay element and a sum 10 torr, and the input of the delay element and the first summing input of the adder. connected to the input of the device, contains an amplifier, a nepecore,, j a carrier frequency filter and a threshold element, while the output of the delay element is connected via a switch to the subtractive input of the adder and to the input of the amplifier whose output is connected to. second summing entrance

Claims

an adder, the output of which is the output of the device, and the input of the device is connected through a serially connected filter of the carrier frequency and a porous element to the control input of the switch. The drawing shows a diagram of the device. The device contains a delay element 1, an adder 2, an amplifier 3, a switch k, a carrier frequency filter 5, a threshold element 6. The device operates as follows. The input current signal through the delay element 1 and the switch is fed to the inverting input of the adder 2, which produces a difference signal approximately corresponding to the derivative. When an amplitude-modulated signal arrives at the device input, threshold element 6 is triggered. As a result, the delayed signal passes to the adder's input through amplifier 3. The peculiarity of the device is that. As a delay element 1, blocks with a frequency-dependent amplitude characteristic can be used (for example, several connected in series aperiodic links) that realize the pure delay function approximately. The amplitude loss of the signal is compensated for by the selection of the gain in amplifier 3. If there is a lag equal to half the period of the carrier frequency, the summation of the delayed and unassigned input signal corresponds to taking the envelope increment. When used as an element of 1 delay of three aperiodic links, the device provides differentiation of the input signal in the frequency band up to 0.1 of the cut-off frequency of aperiodic links. The technical and economic effect of using the invention is due to the expansion of functionality while maintaining accuracy and simplifying the requirements for the elements used. Claims of the invention Differentiating device containing a delay element and an adder, wherein the input of the delay element and the first summing input of the adder are connected to the input of the device, characterized in contains an amplifier, a switch, a carrier filter and a threshold element, while the output of the top element {{ki}} through the switch is connected to the subtractive input of the adder and to the input of the amplifier The motor, whose output is connected to the second one, is the connecting input of the adder, the output of which is the output of the device, and the input of the device through the serially connected filter of the carrier frequency and the threshold element is connected to the control input of the switch. Sources of information taken into account during the examination 1. USSR author's certificate No. 316098, cl. G O P 7/18, 1970.

2. Kanevsky Z.M. and Filkenstein M.I. Fluctuation interference and detection of pulsed radio signals. Gosenergoizdat, 19bZ, with. Q (prototype);