SU573760A1

SU573760A1 - Oscilloscope sweep voltage shaper

Info

Publication number: SU573760A1
Application number: SU742087872A
Authority: SU
Inventors: А.Н. Гончар-Быш; А.Р. Левин; А.Д. Титов
Original assignee: Предприятие П/Я В-8751
Priority date: 1974-12-23
Filing date: 1974-12-23
Publication date: 1979-02-05

Description

1one

Изобретение относитс к электроизмерительной технике и может быть использовано в электронно-лучевых осциллографах с автоматическим выбором скорости развертки.The invention relates to electrical measuring technique and can be used in electron beam oscilloscopes with an automatic selection of the scanning speed.

Известно устройство, в котором обеспечиваетс автоматический выбор скорости развертки при наблюдении периодических сигналов и в зависимости ©т Соотношени периода следовани входного сигаала и скорости развертки на экране ЭЛТ индицируетс от двух до шести периодов входного сигнала .A device is known in which the automatic selection of the scanning speed is ensured when observing periodic signals and depending on the T The ratio of the input signal's tracking period and the scanning speed on the CRT screen is displayed from two to six periods of the input signal.

Однако в таком устройстве в автоматическом режиме не обеспечиваетс достижение максимальной скорости развертки; включение множител скорости развертки произ водитс вручную н не учитываетс цифровой индикацией; из-за наличи бланкируюшей схемы генератор развертки запускаетс третьим синхроимпульсом, что исключает возможность наблюдени переднего фронта коротких импульсов.However, in such a device, in automatic mode, the maximum scanning speed is not achieved; the inclusion of the sweep speed multiplier is performed manually and is not taken into account by the digital display; Due to the presence of the blanking pattern, the sweep generator is triggered by the third clock pulse, which eliminates the possibility of observing the leading edge of short pulses.

Наиболее близким к изобретению по технической ,сущности вл етс устройство формировани напр жени развертки осциллоП1афа , солгржаикч схему синхронизации, вход коюрой подключен к входной шине,The closest to the invention to the technical, the essence is the device for the formation of a voltage sweep oscillo1afa, solgrjakchch synchronization circuit, the input coir connected to the input bus,

генератор развертки, первый вход которого соединен с первым входом схемы автоматического уппазлеии , второй вход - с выходом схемы автоматического управлени , а выход - с вторым входом схемы автоматического управлени и первым входом усил1(тол гор 13онталыюго отклонени , второй вход которого соединен с выходом пере лючател множител скорости развертки, а выход - с электронно-лучевой трубкой, и схему инд {кац1 Н скорости развертки, св занную со схемой автоматического управлени .sweep generator, the first input of which is connected to the first input of the automatic control circuit, the second input is connected to the output of the automatic control circuit, and the output is connected to the second input of the automatic control circuit and the first input of gain1 (the depth of the 13-channel deviation, the second input of which is connected to the output of the switch the multiplier of the scan rate, and the output is with a cathode ray tube, and the ind {cac1 H scan rate circuit associated with the automatic control circuit.

Но и это устройство не обеспечивает максимальную скорость развертки при автоматическом выборе скорости развертки.But this device does not provide the maximum scanning speed with automatic selection of the scanning speed.

Цель нзобретени - обеспечение максимальной скорости развертки при автоматическом выборе скорости развертки.The purpose of the invention is to ensure maximum scanning speed with automatic selection of the scanning speed.

Claims

This is achieved by the fact that an oscilloscope sweep voltage shaping device containing a synchronization circuit, the input of which is connected to the input busbar, a sweep generator, the first input of which is connected to the first input of the automatic control circuit, the second input is connected to the output of the automatic control circuit. and xxx - with the second input of the automatic control circuit to the first input of the horizontal deflection amplifier, the second input of which is connected to the non-switch of the scanning speed multiplier, and the output to the cathode ray tube, and the scanning speed indication circuit associated with the automatic control tixeMGH In accordance with the invention, it is equipped with a frequency divider and an electronic switch, the first input of which is connected to the output of the synchronization circuit and the first input of the frequency divider, the second input - to the output of the frequency divider, the output - from p The first input of the sweep generator, and the third input with the second input of the frequency divider, the second output of the automatic control circuit, the second input of the display circuit, and the input of the switch for the scan speed multiplier. The structural circuit of the proposed device is shown in the drawing. The oscilloscope sweep voltage shaping device consists of the I cHHxpoHHsailnH scheme, the sweep generator 2, the horizontal deflection amplifier 3, the automatic control circuit 4, the sweep speed indication 5, 1, the sweep speed multiplier 6 switch , divisor: 7 lacrVfb and electronic switch., 1 8. The device operates as follows. The cj-signal under study is fed to the input of scheme I, which converts it to the B sequence by it, the pulses of stsidart amplitude and duration with a period of follow equal to the follow-up period of the iVioro signal. The pulses from the output of the circuit I enter the sweep generator 2 and automatic control switch 4 via the electronic switch 8. As the period of the studied signal decreases, the circuit 4 issues commands to increase the speed of the sweep generator 2 until the extreme range is reached. If the period of the investigated signal continues to decrease, i.e. For one gf my sweep stroke comes from the five pulses of circuit 1, then the automatic control circuit includes a switch 6 for the scanning speed multiplier, which increases the scanning speed on the screen of the elec- tron-beam tube, for example, SO times. At the same time, the sweep generator 2 is shifted by the dea range in the direction of decreasing the sweep speed (it is assumed that the sweep ranges change with a step of 1.2.5-10). Simultaneously with switching on the switch., 6 the frequency divider circuit 7 is switched on, and if, for example, switch 6 increased the speed, sweep 10 times, then frequency divider 7 divides the signal at 1:10. Simultaneously with the inclusion of a frequency divider, circuit 4 switches on an electronic switch 8, which switches the first inputs of the sweep generator and automatic control from the output of circuit 1 to the output of frequency divider 7. The circuit 4 takes into account the switching on of the switch (i in the indications of the circuit 5 of the display. If the period of the signal under investigation continues to decrease, then the last two ranges of the sweep generator enable to increase the sweep speed and thus achieve the maximum sweep speed with automatic sweep selection. Further reducing the period of the signal under investigation, circuit 4 blocks the generator 2 and the set maximum sweep speed is maintained. The automatic control circuit switches the generator 2 to two ranges in the direction of decreasing the scanning speed, then switches on the switch 6 and switches the scanning generator to two ranges in the direction of increasing the scanning speed, while the electronic switch 8 switches the inputs of the generator 2 and circuit 4 to the output of circuit 1 The automatic control circuit 4 changes the indication of the display circuit 5 in accordance with the changes made. The invention The oscilloscope sweep voltage shaping device containing a synchronization circuit, the input of which is connected to the input bus, a sweep generator, the first input of which is connected to the first input of the automatic control circuit, the second input - to the output of the automatic control circuit, and the output - to the second input of the circuit automatic control and the first input of the horizontal deflection amplifier, the second input of which is connected to the switch of the sweep speed multiplier, and the output to the cathode ray tube, and a scanning speed indication circuit associated with an automatic control circuit, characterized in that in order to ensure maximum scanning speed when automatically selected, it is equipped with a frequency divider and an electronic switch, the first input of which is connected to the output of the synchronization circuit and the first input of the frequency divider , the second input - with the output of the frequency divider, the output - with the first input of the sweep generator, and the third input - with the second input of the frequency divider, the second output of the automatic control circuit, the second m input indicating circuit and the input of the switch scanning speed multiplier.

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