SU596891A1

SU596891A1 - Double-channel phase meter

Info

Publication number: SU596891A1
Application number: SU762412003A
Authority: SU
Inventors: Рустем Леонтьевич Григорьян; Владимир Григорьевич Нудьга; Юрий Алексеевич Скрипник
Original assignee: Предприятие П/Я А-1490
Priority date: 1976-10-11
Filing date: 1976-10-11
Publication date: 1978-03-05

Description

1one

Насто щее изобретение относитс к измерительной технике, может быть использовано при построении измерителей разности фаз, работающих в широком амплитудном диапазоне входных сиг«алов The present invention relates to a measurement technique, can be used in the construction of phase difference meters operating in a wide amplitude range of input signals.

Известен двухканальный фазометр, содержащий в одном из каналов управл e№rt делитель, состо щий из двух последовательно соединенных управл емых резисторов, обща точка которых подключена к одному из входов фазового детектора, блок сравнени амплитуд сигналов на входах фазового детектора, узел управлени , подключенный к блоку сравнени , отсчетное устройство, св занное по входу с фазовым детектором.A two-channel phase meter is known, containing in one of the control channels e # rt a divider consisting of two series-connected control resistors, the common point of which is connected to one of the inputs of the phase detector, the amplitude comparison unit of the signals at the inputs of the phase detector, the control node connected to to the comparator unit, a readout device coupled to the input to the phase detector.

Цель изобретени - исключение амплитудно-фазовой погрешности фазометра и широком частотном диапазоне входных сигналов.The purpose of the invention is to eliminate the amplitude-phase error of the phase meter and the wide frequency range of the input signals.

Поставленна цель, достигаетс ) тем, что в устройство, содержащее в одном из каналов управл ег-ий делитель, состо щий из двух последовательно соединенных управл емых резисторов, обща точка которых подключена к одному из входов фазового детектора, блок сравнени амплитуд сигналов на входах фазового детектора узел управлени , подключенный к блоку сравнени , отсчетное устройство, св занное по входу с фазовым детектором, последовательно со вторым входом фазоврго детектора включен блок из двух параллельно соединенных .первого и второго управл емых резисторов; цепи управлени одноименных резисторов управл емого делител и блока резисторов соединены параллельно и подключены к выходам увла управлени .The goal is achieved by the fact that in a device containing a control divider in one of the channels, consisting of two series-connected control resistors, the common point of which is connected to one of the inputs of the phase detector, the unit comparing the amplitudes of the signals at the inputs of the phase detector control unit connected to the comparison unit, the reading device connected to the input of the phase detector, in series with the second input of the phase detector, includes a block of two parallel connected first and second channeling proxy resistors; the control circuits of the same resistor of the controlled splitter and the resistor block are connected in parallel and connected to the outputs of the control shaft.

Функциональна схема фазометра приведена на чертеже.The functional diagram of the phase meter is shown in the drawing.

Фазометр состоит из управл емого делител 1, блока управл емых резисторов 2f узла управлени 3, блока сравнени амплитуд сигналов 4, фазового детектора 5 и отсчетног.о устройства 6.The phase meter consists of a controlled divider 1, a unit of controlled resistors 2f of the control unit 3, a unit comparing the amplitudes of the signals 4, a phase detector 5 and a readout device 6.

Claims

The principle of operation of the phase meter is as follows. An input signal with a large amplitude ITj is fed to the input of the first channel, and a signal with a smaller amplitude u2 to the input of the second channel. Comparison unit 4 compares the amplitudes of the input signals passing through the controlled divider 1 and the controllable resistors unit 2, and, if they are unequal, produces a discrepancy signal that is fed to the control unit 3, the control unit changes the resistances of the resistors of the controllable divider so that its transmission coefficient was K UI / UI. At the same time, the control unit 3. Supports the resistances of the resistors of the controllable reaistor of the controllable divider 1. This achieves the equality of the output resistances of the controllable divider 1 and the controllable resistors block 2, and hence the equality of the phase shifts introduced by them. . The signals equalized in amplitude are fed to phase detection 5. The latter extracts information about the pasHOCTli phases of the signals under study, and is recorded in the reading device b. The invention of a two-channel phase meter, which in one of the channels is controlled by a divider, consists of two series-connected controlled resistors, the common point of which is connected to one of the inputs of the phase detector, the amplitude comparison signal at the inputs of the phase detector, the control node connected to the comparison unit The sampling device connected to the input with the phase detector is distinguished by the AND and the fact that, in order to exclude amplitude-phase error, in series with the second input of the phase detector and included unit actuated resistors connected in parallel with each other, and controllable divider unit actuated resistors connected in parallel and are connected to the outputs of the control unit with the control circuit of like resistors. Sources of information taken into account in the examination: 1, USSR Copyright Certificate 317989, Q 01 25/00, 04.03.70.

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