SU783955A1

SU783955A1 - Single-shot multivibrator

Info

Publication number: SU783955A1
Application number: SU792712634A
Authority: SU
Inventors: Леонид Феликсович Берзин; Александр Леонтьевич Якимаха
Original assignee: Всесоюзный Научно-Исследовательский Институт Аналитического Приборостроения Киевского Нпо "Аналитприбор"
Priority date: 1979-01-12
Filing date: 1979-01-12
Publication date: 1980-11-30

Description

Изобретение относится к импульсной технике и может быть использовано в устройствах автоматики и измерительной техники.The invention relates to a pulse technique and can be used in automation devices and measuring equipment.

Известен одновибратор, содержащий 5 два транзистора, включенных по схеме с общим эмиттером, конденсатор и резисторы £13 ·Known one-shot, containing 5 two transistors connected according to the scheme with a common emitter, capacitor and resistors £ 13 ·

Однако этот одновибратор имеет недостаточный диапазон регулирования длительности импульсов.However, this single-shot has an insufficient range of regulation of the pulse duration.

Известен одновибратор, содержащий два транзистора, включенных по схеме с общим эмиттером, конденсатор, резисторы и два полевых транзистора, включенных параллельно резисторам ИОднако этот одновибратор имеет недостаточный диапазон регулирования длительности импульсов и нелинейную 20 зависимость длительности импульсов от величины в связи с тем, что изменяющееся напряжение управляющего напрягкения на конденсаторе в процессе его, разряда складывается с управляющим 25 напряжением для полевого транзистора и искажает его регулирующую функцию.A single vibrator is known that contains two transistors connected in a circuit with a common emitter, a capacitor, resistors and two field-effect transistors connected in parallel with the IO resistors, however, this single vibrator has an insufficient pulse width control range and a non-linear 20 dependence of the pulse duration on the value due to the fact that the changing voltage control voltage on the capacitor during it, the discharge is added to the control voltage 25 for the field effect transistor and distorts its regulatory function th.

Целью изобретения является расширение диапазона регулирования длительности импульса и получение линей-30 ной зависимости длительности импульса от величины сигнала управления. Для достижения указанной цели в одновибратор, содержащий два транзистора, включенных по схеме с общим эмиттером, коллектор первого из которых через резистор соединен с базой второго, коллектор которого через кон денсатор соединен с базой первого транзистора,'которая через резисторы соединена с шинами источника питания, а непосредственно - со стоками полевых транзисторов, истоки которых соединены с шинами источника питания, 15 а затворы соединены с одним из выводов резисторов, введен транзистор, эмиттер и коллектор которого соединены с затворами полевых транзисторов, причем другие выводы резисторов соединены с шинами источника питания.The aim of the invention is to expand the range of regulation of the pulse duration and obtain a linear-30 dependence of the pulse duration on the magnitude of the control signal. To achieve this goal, a one-shot oscillator containing two transistors connected in a circuit with a common emitter, the collector of the first of which is connected through the resistor to the base of the second, whose collector is connected through the capacitor to the base of the first transistor, 'which is connected through the resistors to the buses of the power source, and directly - with drains of field-effect transistors, the sources of which are connected to the buses of the power source, 15 and the gates are connected to one of the terminals of the resistors, a transistor is introduced, the emitter and collector of which are connected to thieves FETs, and the other terminals of the resistors are connected to the power supply rails.

-На чертеже приведена принципиальная электрическая схема одновибратора.-The drawing shows a circuit diagram of a single vibrator.

Одновибратор содержит транзисторы 1 и 2, включенные по схеме с общим эмиттером) полевые транзисторы 3 и 4 включенные последовательно, истоки которых связаны с шинами питания 5 ;и 6; резисторы'7 и 8, включенные па3 783955 раллельно транзисторам 3 и 4).транзистор 9, коллектор и эМиттёр которого связаны с затворами транзисторов 3 и 4 и через резисторы 10 и 11 - с шинами питания 5 и 6, а база - с входной клеммой 12? выходную шину 13 и шину запуска 14? конденсатор 15,свя- ³ зывающий коллектор транзистора 2 с' базой транзистора 1? резистор 16,связывающий коллектор транзистора 1 с базой транзистора 2. . *The one-shot contains transistors 1 and 2, connected according to the scheme with a common emitter) field-effect transistors 3 and 4 connected in series, the sources of which are connected to power buses 5; and 6; resistors'7 and 8 connected by Pa3 783955 in parallel to transistors 3 and 4). transistor 9, the collector and emitter of which are connected to the gates of transistors 3 and 4 and through resistors 10 and 11 - with power buses 5 and 6, and the base - with the input terminal 12? output bus 13 and start bus 14? capacitor 15, svya- ³ binding to the collector of the transistor 2 'base of the transistor 1? a resistor 16 connecting the collector of transistor 1 to the base of transistor 2.. *

Транзисторы 3 и 4 с противополож- ным типом проводимости каналов совместно с резисторами 7 и 8 образуют два регулируемых плеча сопротивлений каждое из которыхоказывает’влияние на формирование длительности импуль- 15 сов. При управляющем сигнале равном нулю сопротивление сток-исток транзисторов 3 и 4 минимально и время разряда конденсатора 15 через источник питания, транзистор 2 и параллельно 20 включенные транзисторы 3 и резистор 7 также минимально как и поцепи: транзистор 2 - параллельно включенные резистор 8 и транзистор 4. Возрастание отрицательного напряжения на управляющем входе транзистора 9 приводит к воэрастаНиюположительного напряжения на затворе транзистора 3 и отрицательного напряжения на затворе транзистора 4, что приводит к возрастанию сопротивлений транзисторов 3 и 4 . ·Transistors 3 and 4 with the opposite type of channel conductivity, together with resistors 7 and 8, form two adjustable resistance arms, each of which has an effect on the formation of the pulse duration of 15 owls. When the control signal is zero, the drain-source resistance of transistors 3 and 4 is minimal and the discharge time of capacitor 15 through a power source, transistor 2 and parallel 20 connected transistors 3 and resistor 7 is also minimal as well as a circuit: transistor 2 - resistor 8 and transistor 4 connected in parallel An increase in the negative voltage at the control input of the transistor 9 leads to a positive voltage at the gate of the transistor 3 and a negative voltage at the gate of the transistor 4, which leads to an increase in the resistance transistors 3 and 4. ·

В отличие от прототипа здесь напряжение на' конденсаторе 15 не изменяет управляющего напряжения затвористок Транзистора 3 и не искажает его регулирующей функции.Вследствие ’этого данный одновибратор имеет больший диапазон регулирования длитель- « ности импульса с линейной зависимостью от сигнала управления.Unlike the prototype, the voltage across the 'capacitor 15 does not change the control voltage of the gates of the Transistor 3 and does not distort its regulatory function. As a result, this single-shot has a wider range of regulation of the pulse duration with a linear dependence on the control signal.

Claims

The invention relates to a pulse technique and can be used in automation and measuring devices. Known one-shot containing two transistors included in the scheme with a common emitter, a capacitor and resistors {. However, this one-shot has an insufficient range of control of the pulse duration. A one-shot is known, containing two transistors connected according to a common emitter circuit, a capacitor, resistors and two field-effect transistors connected in parallel to the resistors. However, this one-shot has a sufficient control range for pulse durations and a nonlinear dependence of the pulse duration on the value due to the fact that If the voltage of the control voltage on the capacitor during its operation, the discharge is added to the control voltage for the field-effect transistor and distorts its control function. The aim of the invention is to extend the range of control of the pulse duration and obtain a linear dependence of the pulse duration on the magnitude of the control signal. To achieve the specified purpose, a one-shot contains two transistors connected according to a common emitter circuit, the collector of the first of which is connected via a resistor to the base of the second, whose collector is connected via a capacitor to the base of the first transistor, and directly - with the drain of field-effect transistors, whose sources are connected to the power supply buses, and the gates are connected to one of the resistor terminals, a transistor is inserted, the emitter and the collector of which are connected to thieves FETs, and the other terminals of the resistors are connected to the power supply rails. “In the drawing, an electrical circuit of a one-shot is shown in principle. The single-oscillator contains transistors 1 and 2, connected in accordance with a common emitter circuit; field-effect transistors 3 and 4 are connected in series, the sources of which are connected to the power buses 5: and 6; resistors 7 and 8, connected in parallel with transistors 3 and 4}. transistor 9., Teflektr and ktbrogo are connected with the gates of transistors 3 n 4 and through resistors 10 and 11 - with power buses 5 and 6, and the base with input terminal 12 ; output bus 13 and start bus 14, a capacitor 15 connecting the collector of transistor 2 to the base of transistor 1, a resistor 16, connecting the collector of transistor 1 to the base of transistor 2,. The transistors 3 and 4 with the opposite type of conduction of the channels, in combination with the resistors 7 and 8, form two adjustable arms of resistance each of which is formed by the formation of the pulse duration. When the control signal is equal to zero, the drain-source resistance of transistors 3 and 4 is minimal and the time series of capacitor 15 through the power supply, transistor 2 and parallel-connected transistors 3 and resistor 7 is also minimal as in the circuit: transistor 2 is a parallel-connected resistor 8 and the transistor 4. The increase of the negative voltage on the control of the input of the transistor 9 p; RdDyt to ysroyyy1 0 ydj13Zytёlylyo || this is the gate voltage of the transistor 3 and the negative voltage: on the gate of the transistor 4, which leads to an increase ivleny transistors 3 and 4. Unlike the prototype, here the voltage on the capacitor 15 does not change the control voltage of the gate valves of the transistor 3 and does not distort its regulating function. As a result, this one-shot has a larger pulse-width control range with a linear dependence on the control signal. Claims of the invention A one-oscillator containing two transistors connected in a circuit with a common emitter, the collector of the first of which connects through a resistor to the base of the second, the collector of which through a capacitor connects to the base of the first transistor, which through resistors is connected to the source and direct current buses with field effect transistors, the sources of which are connected to the power supply buses, and the gates are connected to one of the resistor terminals, which differs from and to the fact that, in order to extend the control range, the pulse and the linear dependence of the pulse duration on the magnitude of the control signal, a transistor is inserted in it, the emitter and collector of which are connected to the gates of loop transistors, and other terminals of the resistors are connected to the power supply buses. Sources of information taken into account during the examination 1. USSR author's certificate No. 425320, cl. H 03 K 3/281, 1972.

2. USSR author's certificate number 621072, cl. H 03 K 3/284, 09.11.76 (prototype).

Of 5

en