SU949524A2

SU949524A2 - Voltmeter

Info

Publication number: SU949524A2
Application number: SU792854510A
Authority: SU
Inventors: Людмила Степановна Иванцив; Роман-Андрей Дмитриевич Иванцив; Эдуард Ильич Павлюк
Original assignee: Предприятие П/Я В-8751
Priority date: 1979-12-19
Filing date: 1979-12-19
Publication date: 1982-08-07

Description

Изобретение относитс к измери- тельной технике и может быть использовано дл измерени амплитуды импульсов .The invention relates to a measurement technique and can be used to measure the amplitude of pulses.

По основному авт. св. 347670 известен вольтметр, содержащий первый пиковый детектор, вход которого соединен с входной шиной, подключенной к первому входу формировател длительности импульсов, выход которого соединен с первым входом формировател амплитуды импульсов, выход которого через второй пиковый детектор подключен к первому входу дифференциального усилител , к второму входу которого подключен выход пер- . вогр пикового детектора, а выход дифференциального усилител - к второму входу формировател амплитуды импульсов, выходной шине и через резистивный делитель - к второму входу формировател длительности импульсов 1.According to the main author. St. 347670 known voltmeter, containing the first peak detector, the input of which is connected to the input bus connected to the first input of the pulse width generator, the output of which is connected to the first input of the pulse amplitude generator, the output of which through the second peak detector is connected to the first input of the differential amplifier, to the second input the output of which is connected peak detector, and the output of the differential amplifier to the second input of the pulse amplitude driver, the output bus and via a resistive divider to the second input of the pulse width generator 1.

Недостатком известного вольтметра вл етс устойчивый режим работы в ограниченном диапазоне изменени скважност.и входного сигнаипа.The disadvantage of the known voltmeter is stable operation in a limited range of variation of the duty cycle and the input signal.

Целью изобретени вл етс расширение динамического диапазонаThe aim of the invention is to expand the dynamic range.

входного сигнала в сторону низких частот.input signal towards the lower frequencies.

Поставленна цель достигаетс тем, что в вольтметр введен третий пиковый детектор, причем выход дифференциального усилител через третий пиковый детектор соединен с вторым входом формировател амплитуды импульсов.The goal is achieved by introducing a third peak detector into the voltmeter, and the output of the differential amplifier is connected to the second input of the pulse amplitude generator via a third peak detector.

10ten

На чертеже приведена структурна схема вольтметра.The drawing shows a structural diagram of a voltmeter.

Схема содержит пиковые детекторы 1 и 2, дифференциальный усилитель 3 посто нного тока, формирователь 4 The circuit contains peak detectors 1 and 2, a differential amplifier 3 of direct current, shaper 4

15 амплитуды импульсов, формирователь 5 длительности импульсов, дополнительный пиковый детектор 6 и резистивный делитель 7.15 pulse amplitudes, pulse width former 5, additional peak detector 6 and resistive divider 7.

Устройство работает следующим The device works as follows.

20 образом.20 way.

При поступлении на вход вольтметра импульсов на пиковом детекторе 1 формируетс напр жение, которое поступает на один из входов дифференциального усилител 3. Второй импульс подаетс также на формирователь 5 длительности, где формируетс импульс посто нной амплитуды с длительностью , равной длительности входного When a pulse arrives at the input of a voltmeter on a peak detector 1, a voltage is generated which is supplied to one of the inputs of the differential amplifier 3. The second pulse is also fed to a shaper 5 of duration, where a pulse of constant amplitude is formed with a duration equal to the duration of the input

Claims

30 pulse at the level / determined by the division factor of the resistive divider 7. This pulse arrives at the input of the amplitude generator 4, and at its output a pulse is formed whose amplitude is determined by the output voltage of the peak detector 6, which is the output voltage of the voltmeter. From the output of the shaper 4, the amplitude is given a pulse arrives at the peak detector 2, at the output of which a voltage is applied to the second input of the differential force of the body 3. The voltage difference at the input of the latter is amplified, and the output voltage of the amplifier 6, where it is detected and supplied to the amplitude driver 4 and to the output of a voltmeter. In the steady-state mode, the amplitude shaper also generates pulses that are equal in amplitude to the input pulses, and the constant output voltage of a volt meter is equal to the amplitude of the input pulses. A feature of the proposed volt meter is a steady mode of operation in a wide range of input voltage balance. This is ensured by the fact that the presence of the third peak detector b does not allow a significant decrease in the output voltage during the pause time. At this time, the input voltage of the amplifier 3 is the voltage C -UaUH) -e, where and is the amplitude of the input signal) -the voltage at the output of the voltmeter at the time t tn is the pulse duration; constant peak detector time 1 and

2. At the end of the pause time at the output of the differential amplifier 3, the voltage is reduced to a value. E. The output voltage of the voltmeter and the amplitude of the compensating pulses will not decrease according to the output voltage of the amplifier, which at large T - t is significant, but is determined by the output voltage of the peak detector b, the constant of the discharge time of which,. The positive effect is to ensure stable operation in a wider range of changes in the duty cycle of the input signal. If it is necessary to measure the amplitude of the pulses in a wide range of variation of the input signal using the known device, it is necessary to use two voltmeters operating in different ranges, using the proposed device, the problem is solved with a single voltmeter. The invention of the Voltmeter on the author. St. 347670, characterized in that, in order to broaden the dynamic range of the input signal towards low frequencies, a third peak detector is introduced into it, with the output of the differential amplifier connected to the second input of the pulse amplitude generator via the third peak detector. Sources of information taken into account in the examination 1. USSR author's certificate 347670, cl. G 01 R 19/04, 1970.