SU515260A1

SU515260A1 - Sawtooth generator

Info

Publication number: SU515260A1
Application number: SU2109512A
Authority: SU
Inventors: Валентин Михайлович Кацман
Priority date: 1975-02-27
Filing date: 1975-02-27
Publication date: 1976-05-25

Description

(54) ГЕКЕ-:РАТОР ПИЛООБРАЗНОГО НАПРЯЖЕНИЯ(54) HEKE-: POWER VOLTAGE RATOR

Изобретение этнэситс к импульсной технике ггредказначено дл использовани в цифровых измеритальных устройствах в качестве компаратора, а также в качестве генератора развертки в осциллографах.The invention of ethnics to a pulsed technique is meant for use in digital measuring devices as a comparator, as well as a sweep generator in oscilloscopes.

Известно устройство, содержащее тиристор , два источника питани , разделительный конденсатор и врем задающую п С цепь ,A device containing a thyristor, two power sources, an isolating capacitor and a time setting circuit n is known,

Однако известное устройство не позвол ет получить пилообразное напр жение, симметричное относительно нулевого уровн .However, the known device does not allow to obtain a sawtooth voltage that is symmetrical about the zero level.

Целью изобретени вл етс .чение пилообразного капр сенп . симметричного относительно нулевого уров-г .The aim of the invention is to consider a sawtooth caprone. symmetric with respect to the zero level g.

Дл этого в предлагаемый генерат -.:, введены последовательно соединенные а.иод и стабилитрон, катод которого подключен к заземленной обкладке конденсатора врем задающей R , друга обкладка которого подключена к катоду тиристора, подключенному через резистор врем задающий Pi С-депи к одному источнику питани , гфи этом анод тиристора подключен к другому источнику питани , а управл ющий электрод For this purpose, in the proposed generator -.:, Are in series connected A.I. and a zener diode, the cathode of which is connected to the grounded plate of the capacitor, which specifies R, the other plate of which is connected to the thyristor cathode, connected through a time resistor Pi C-depy to one power source In this case, the thyristor anode is connected to a different power source, and the control electrode

. к катоду упом нлтого дпода и к клемме источника входного сигнала.. to the cathode of the mentioned dpod and to the terminal of the input source.

На фиг, 1 представлена электрическа принципиальна cxeN.a генератора пилообразного напр жени ; а на фиг. 2 - диаграммы его работы.Fig. 1 shows an electrical principle cxeN.a of a sawtooth generator; and in fig. 2 - diagrams of his work.

Генератор содержит тиристор 1, анод которого подсоединен к источнику 2. пита- нкЯ) катод - к одной обкладке конденсатор 3, друга обкладка которого заземлена, и через резистор 4 вре.м задаюшей R С- цепи - к источнику 5 питани , а управл ющий электрод - к катоду диода 6, анод которого через стабилитрон 7 подключен ;-. заземленной обкладке конденсатора 3 и через разделительггый конденсатор 8 - к клемме 9 источника входного сигнала.The generator contains a thyristor 1, the anode of which is connected to the power source 2.) cathode - to one plate capacitor 3, the other plate of which is grounded, and through the resistor 4 time of the R C circuit - to the power source 5, and controlling electrode - to the cathode of diode 6, the anode of which is connected through zener diode 7; -. the grounded plate of the capacitor 3 and through the separator capacitor 8 to the terminal 9 of the input source.

При включении питани тиристор 1 заперт , начинаетс зар д конденсатора 3 от ИСТОЧНИК 5 питани .When the power is turned on, the thyristor 1 is locked, the charge of the capacitor 3 starts from the SOURCE 5 of the power supply.

Claims

When the voltage on the capacitor 3 exceeds the turn-on voltage of the Zener diode 7, the latter will turn on and open the thyristor. Capacitor 3 bounce recharges from the voltage of the power source 2 to a positive potential on the top plate, after which the thyristor 1 is locked as the current passing through it becomes less than the turn-off current, the capacitor 3 under the action of the power supply 5 starts recharge exponentially through zero to negative potential. When the negative potential on the capacitor 3 reaches the level of the zener diode 7, the process will open and the process will repeat. Diode 6 prevents the closure of sync pulses to ground. To synchronize the saw, the frequency of the incoming position of the TenbEibix pulses must be somewhat higher than the natural frequency of the generator. FIG. 2a shows a graph of the voltage at the output of the device in the mode of natural oscillations, and FIG. 26 is the output voltage synchronized by pulses. Unlike other sawtooth voltage generator circuits, where the power supply voltage is connected directly to the thyristor, which limits the allowable voltage, in the proposed device, a small voltage of the power supply source 2 is applied to the thirlstor. The linearity of the saw is determined by the power source 5, the voltage of which can be chosen much higher than the admissible voltage of the thyristor. Claims A sawtooth voltage generator comprising a thyristor, two power sources, a coupling capacitor, and a time setting R C circuit, characterized in that, in order to obtain a sawtooth voltage that is symmetrical about a zero level, a series-connected diode and the zener diode, the cathode of which is connected to the grounded capacitor plate, is the time of the driving ft C circuit, the other plate of which is connected to the cathode of the thyristor connected through the time resistor that specifies R to one source In this case, the anode of the thyristor is connected to another power source, and the control electrode is connected to the cathode of the diode and to the terminal of the input signal source.

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