SU627571A1

SU627571A1 - Controlled phantastron generator

Info

Publication number: SU627571A1
Application number: SU762428257A
Authority: SU
Inventors: Валентин Григорьевич Анучин; Николай Никитович Егорцев
Original assignee: Предприятие П/Я Г-4158
Priority date: 1976-12-13
Filing date: 1976-12-13
Publication date: 1978-10-05

Description

Изобретение относитс к импульсной технике.The invention relates to a pulse technique.

Известен управл емый фантастронный генератор, содержащий несколько транзисторов разного типа проводимости, соедине ных между собой через резисторы, врем - задающую RC-цепь и разв зывающие цепи С ЗДанный генератор не обеспечивает необходимых параметров выходного сигнала, A known controlled fadr generator, containing several transistors of different conductivity type, interconnected through resistors, time - specifies an RC circuit and uncoupling circuits. The oscillator does not provide the necessary output signal parameters

Наиболее близким по технической сущности вл етс фантастронный генератор, содержащий три транзистора п-р-п типа про водимости, эмиттер первого из которых со&tamea с коллектором второго и эмиттером третьего транзистора, один транзистор типа поводимости, включенный по схеме с общим эмиттером, в коллекторную цепь которого включены последовательно два резистора, точка соединени которых соединена с базой первого из транзисторов типа проводимости, коллектор которого подключен к точке соединени первого и второго резисторов трехрезисторного делител напр жени , а база тре- The closest in technical essence is a fadron generator containing three transistors of pnp type of conduction, the emitter of the first of which is amp and tamea with the collector of the second and the emitter of the third transistor, one transistor of the type of susceptibility, connected according to the scheme with a common emitter, the collector circuit of which is connected in series two resistors, the connection point of which is connected to the base of the first transistor of the conduction type, the collector of which is connected to the connection point of the first and second resistors molecular voltage divider and the base tre-

тьего транзистора п-р-п типа проводимости соединена с точкой соединени третье- го и второго резисторов делител иапр же ни , врем задающий конденсатор, подключенный к коллектору третьего транзистора п-р-п типа проводимости и врем задающей резисторной цепи, диод, включенный между коллектором третьего транзистора п-р-п типа проводимости и базой транзистора типа проводимости, соединенной через резистор с базой второго транзистора п-р-п типа проводимости ,2the second transistor of the pnp type of conductivity is connected to the connection point of the third and second resistors of the divider; however, the time specifies a capacitor connected to the collector of the third transistor of the pnp type of conductivity and the time of the driving resistor, a diode connected between the collector of the third transistor pnp conduction type and the base of the transistor of conduction type connected through a resistor to the base of the second transistor nnpn conduction type, 2

Недостатком этого генератора вл етс недостаточна точность управлени частотой .The disadvantage of this generator is the insufficient accuracy of frequency control.

Целью изобретени вл етс повышение точности управлени частотой генерации,The aim of the invention is to improve the accuracy of control of the generation frequency,

Claims

This goal is achieved by the fact that in a controlled fadron generator containing three transistors of pn type of conductivity, the emitter of the first of which is connected to the collector of the second and the emitter of the third transistor, one transistor (. Of the type of conductivity included according to the scheme with a common emitter, in the collector circuit of which two resistors are connected in series, the connection point of which is connected to the base of the first transistor of the conduction type, the collector of which is connected to the connection point of the first and second resistors voltage divider, and the base of the third transistor of the conduction type is connected to the connection point of the third and second resistors of the divider voltage, the time setting of the capacitor connected to the collector of the third transistor of the conductivity type and the time of the driving resistor, a diode connected between the collector of the third transistor pnp of conduction type and base of transistor of ppn conductivity type, connected through a resistor to the base of the second transistor of npn conduction type, an additional transistor of pnp pro type is introduced Suspension and field-effect transistor, the gate of which is connected to the collector of the first transistor of the conduction type, and the source - with the time of the driving capacitor and the base of the additional transistor of the conduction type, the emitter of which is connected to the base of the second transistor of the pn-type conductivity, while the drain of the field-effect transistor and the collector of the additional transistor ppn conduction type connected to the common bus. The drawing shows the principal electrical circuit of the fancy generator described. The generator contains transistors 1–3 pnp of conduction type, transistor 4 pnp of conductivity type, time specifying a capacitor 5, diode 6, second transistor 7p-pp of conductivity type, solitary transistor 8, resistors 9 -19 .. A control signal is applied to the input bus 2O. The output signal is removed from output 21. The principle of operation of the generator is as follows. The output voltage U at the initial output. the moment of the transient procession is determined by the voltage value of the capacitor 5, charged through the field effect transistor 8, and it is equal to the maximum value. In a transient mode, the output voltage is U.g, | falls, if the input voltage is x more than some voltage C, then it goes to zero, if U. less than U - to the final value. The charge of the driving capacitor 5. Occurs when the transistor 3 is locked. 8 As a resistor of the emitter connection, a series-emitter-connected collector-emitter junction of the transistor: torus 2 and resistor 14 are used. Peg; the output from the first steady state corresponds to a direct The saw-tooth voltage or amplification mode with OTKpfJtom transistor 3, to the second, when transistor 3 closes, and transistor 1 opens, is due to the relatively slow decrease of voltage in the base of transistor 3. The reverse od of the second to the first reduction occurs Siete voltage on the base of transistor 1 to the voltage on the base of the transistor 3. The tipping process proceeds spontaneously due to the presence of communication via emitters of transistors 1 and 3 is effected by the presence of the resistor 14 and the emitter circuit Transistor pa

2. From the time T, which corresponds to the end of the charge of the capacitor 5 and the transition to the first state with simultaneous closing of the field-effect transistor 8, the transition process begins, at which the output voltage Ufi .. drops, which corresponds to the direct sawtooth voltage code. At time T, the output voltage C, d drops below the base voltage of transistor 3, and the latter goes into saturation mode. Thereafter, the base voltage of the transistor 3 begins to fall with a sharp increase in the base current. At time T, the base voltages of the transistors 3 and 1 are compared and a transition occurs to the second state in which the transistor 3 closes and the field-effect transistor 8 opens and the charge of the capacitor 5 starts, i.e. reverse sawtooth voltage. At the time T, when the output voltage Ug (, |; begins to exceed the voltage of the power source Eg. (Not shown), the diode 6 opens, the transistor 4 closes. The base voltage of transistor 1 drops below the base voltage of transistor 3, a transition occurs into the first state with simultaneous closure of the field-effect transistor 8. This completes the full cycle of the oscillating process. If the input voltage U gj is applied to the input voltage U gj, then the output voltage U will fall only to the base voltage of transistor 1, the oscillating process is terminated and the fadron generator will go into an amplifier mode. Formula of the invention A controlled fadron generator containing three transistors of pnp type