SU984011A1

SU984011A1 - Sawtooth current generator

Info

Publication number: SU984011A1
Application number: SU782668095A
Authority: SU
Inventors: Анатолий Макарьевич Лицкевич
Original assignee: Предприятие П/Я А-1772
Priority date: 1978-09-27
Filing date: 1978-09-27
Publication date: 1982-12-23

Description

(54) ГЕНЕРАТОР ПИЛООБРАЗНОГО ТОКА(54) CURRENT GENERATOR

1one

Изобретение относитс к импульсной технике и может быть использовано , например, в развертывающих устройствах дл передающих телевизионных камер.The invention relates to a pulse technique and can be used, for example, in scanning devices for transmitting television cameras.

Известен генератор пилообразного тока, содержащий, входной согласующий элемент, вход которого подключен к первой шине входа, выход - к управл ющему входу ключа двусторонней проводимости , индуктивную нагрузку, один из выводов которой подключен к общей шине устройства 1.Known generator sawtooth current, containing, the input matching element, the input of which is connected to the first bus input, the output to the control input of the key double-sided conductivity, inductive load, one of the conclusions of which is connected to the common bus device 1.

Недостатком устройства вл етс недостаточно высока линейность формируемого тока.The drawback of the device is that the current generated is not high enough.

Наиболее близким по техническому решению вл етс генератор пилообразного тока, содержащий входной согласующий элемент, вход которого подключен к первой шине входа, выход к управл ющем входу ключа двусторонней проводимости, первьлй вывод которого подключен к первому выводу индуктивной нагрузки, первый источник питани , второй ключ двусторонней проводимости 2j.The closest technical solution is a sawtooth current generator, containing an input matching element whose input is connected to the first input bus, an output to a control input of a double conduction key, the first output of which is connected to the first inductive load terminal, the first power source, the second two-way key conductivity 2j.

Недостатком устройства вл етс существенна нелинейность тока на обратном ходу развертки.The drawback of the device is the substantial non-linearity of the current in the reverse sweep.

Целью изобретени вл етс повышение линейности формируемого тока.The aim of the invention is to increase the linearity of the generated current.

Поставленна цель достигаетс тем, что в генератор .пилообразного тока, содержащий входной согласуювщй элемент, вход которого подключен к первой шине входа, выход к управл ющему входу ключа двусторонней проводимости , первый вывод которого под10 ключен к первому выводу индуктивной нагрузки, первый источник питани , второй ключ двусторонней проводимости , введены второй источник питани и второй согласующий элемент, вход The goal is achieved by the fact that a saw-tooth generator containing an input matching element whose input is connected to the first input bus, an output to the control input of a double-conductor key, the first output of which is connected to the first inductive load output, the first power supply, the second a key of double-sided conductivity; a second power source and a second matching element, input

15 которого подключей ко второй шине входа, выход - к управл ющему входу второго ключа двусторонней проводимости , первый вывод которого подключен к первому выводу индуктивной на20 грузки, второй вывод которой подключен к общей шине устройства, вторые выводы каждого из ключей двусторонней проводимости подключены к разнопол рным выводам первого и второго 15 which is connected to the second input bus, output to the control input of the second double-conductor key, the first output of which is connected to the first output of the inductive load 20, the second output of which is connected to the common bus of the device, the second outputs of each of the double-ended conductance keys conclusions of the first and second

25 источников питани соответственно.25 power sources respectively.

На чертеже приведена принципиальна электрическа схема устройства.The drawing shows a circuit diagram of the device.

Устройство содержит первый входной согласующий элемент 1 на транзисторе The device contains the first input matching element 1 on the transistor

Claims

30 2, resistor 3, bus 4 inputs, the first switch 5 of double-sided conduction, on the transistor b, diode 7, inductive load 8, the second switch 9 of double-sided conduction on the transistor, 1 diode 11, bus 12 and 13 of the first and second power supply , the second matching element 14 on the transistor 15, the resistor 16, the second bus 1 input. The busbars 4 and 17 are supplied with a control impulse voltage of such polarity that when the transistor D is opened, the first matching element 1 transistor 15 of the second matching element 14 is locked, and vice versa. When disconnected across the bus 4 of transistor 2, resistor 3 is connected, to the case and in the series circuit of the emitter collector of transistor 2, resistor 3, the base-emitter of transistor b current flows. The transistor b is unlocked and provides the connection of an inductive load 8 to the potential bus 12 of the power supply. A direct sweep stroke begins, during which the current in an inductive load 8 under the action of the voltage of the power source changes according to a law close to linear, first decreasing to zero, then, changing the direction to the opposite, increasing. When locking the transistor 2 to. bus 4 of the control pulse voltage simultaneously opens transistor 15 across bus 17, connects resistor 16 to the case, and in a series circuit emitter-collector of transistor 15, resistor 16, base-emitter of transistor 10 current flows. Transistor 10 is unlocked and connects inductive load 8 to potential bus 13 of the second power source. The reverse turn of the screwdriver begins. Due to the fact that the polarity of the power supply bus 13 is opposite to the polarity of the power supply bus 12, the current in the inductive load 8 decreases to zero during reverse rotation, and then, changing the direction to the opposite, begins to increase, changing and during the forward stroke, according to a law close to linear. Due to keys 5 and 10 of bi-directional conduction, capable of passing current in both directions, a sawtooth current is formed in an inductive load without a constant component of increased linearity. Then the processes in the device are repeated. An inventive sawtooth current generator comprising a first input matching element whose input is connected to the first input bus, an output to the control input of the first double conduction switch, the first output of which is connected to the first inductive load terminal, the first power supply and the second double conduction switch, characterized in that, in order to increase the linearity of the generated current, a second power source and a second matching element are introduced into it, the input of which is connected to the second input bus, d - to the control input of the second double-sided conduction key, the first output of which is connected to the first output of an inductive load, the second output of which is connected to the common bus of the device, and the second outputs of each of the keys of the external conductance are connected to different polarities of the first and second power sources - respectively . Sources of information taken into account in the examination 1. USSR author's certificate in accordance with application 2575921 / 18-21, cl. And 03 K 4/60, 03.02.78.

2. USSR author's certificate for application number 3241954 / 18-21, cl. H 03 K 4/60, 08.08.78.