SU1704263A1

SU1704263A1 - Controllable crystal oscillator

Info

Publication number: SU1704263A1
Application number: SU894740773A
Authority: SU
Inventors: Валерий Михайлович Аксенов; Илья Викторович Финкель; Юрий Александрович Трифонов; Андрей Иванович Ивашков; Михаил Анатольевич Серебров
Original assignee: Научно-исследовательский институт "Фонон"
Priority date: 1989-09-25
Filing date: 1989-09-25
Publication date: 1992-01-07

Description

Изобретение относитс к радиотехнике и мо.Ж Зг быть использовано в качестве источника электрических колебаний.The invention relates to radio engineering and the MO.G. WG to be used as a source of electrical oscillations.

Цоль изоирегени - расширение диапазона перестройки частоты и повышение стабильности амплитуды выходных колебаний.Zero isoreigeni - extending the frequency tuning range and increasing the stability of the amplitude of the output oscillations.

На чертеже приведена структурна электрическа схема управл емого кварцевого генератора.The drawing shows a structural electrical circuit of a controlled quartz oscillator.

.Управл емый кварцовьГи генератор содержит активную 1. цепь 2 управлени частотой, кварцевый резонатор 3. первый и второй транзисторы 4 и 5, первый и второй конденсаторы 6 и 7, первый и второй вари- капы 8 и 9, первый, второй, третий, четвертый , п тый, шестой, седьмой, восьмой, дев тый и дес тый резисторы 10-19, первый и еггорой управл емые резисторы 20 и 21, перво и втора диодные цепи 22 и 23.A controlled quartz oscillator contains an active 1. frequency control circuit 2, a quartz resonator 3. the first and second transistors 4 and 5, the first and second capacitors 6 and 7, the first and second varicaps 8 and 9, the first, second, third, the fourth, fifth, sixth, seventh, eighth, ninth and tenth resistors 10-19, the first and its controlled resistors 20 and 21, the first and second diode circuits 22 and 23.

Управл емый кварцевый генератор работает следующим образом.The controlled quartz oscillator operates as follows.

Первый и второй варикапы 8 и 9 также первый и второй конденсаторы образуют цепь управлени фактором регенерации-. Первый транзистор 4. первый, второй и третий резисторы 10. И и 12. первый управл емый резистор 20. перва диодна цепь 22, а также седьмой резистор 16 образуют первый функциональный преобразователь. Второй транзистор, четвертый, п тый и шестой резисторы 13,14 и 15. второй управл емый резистор 21, втора диодна цепь 23, а также оосьмой резистор 8 образуют второй функциональный преобразователь.The first and second varicaps 8 and 9 also the first and second capacitors form the control circuit of the regeneration factor-. The first transistor 4. the first, second, and third resistors 10. Both and 12. The first controlled resistor 20. the first diode circuit 22, as well as the seventh resistor 16, form the first functional converter. The second transistor, the fourth, fifth and sixth resistors 13, 14 and 15. The second controlled resistor 21, the second diode circuit 23, and the eight resistor 8 form the second functional converter.

При перестройке частоты генерируемых колебаний измен етс реактивное сопротивление цепи 2, что приводит к изменению сопротивлени потерь вносимого кварцевым резонатором 3 и, как следствие , к изменению амплитуды колебаний на выходе актипной части 1.When tuning the frequency of the generated oscillations, the reactance of the circuit 2 changes, which leads to a change in the loss resistance introduced by the quartz resonator 3 and, as a result, to a change in the amplitude of oscillations at the output of the typical part 1.

Дл устранени указанного недостатка напр жение с шины управлени через первый и второй функциональные преобразователи подаетс на входы цепи управлени фактором регенерации, сопротивление которой измен етс таким образом что компенсирует изменение сопротивлени потерь, вносимых кварцевым резонатором 3.To eliminate this drawback, the voltage from the control bus through the first and second functional converters is fed to the inputs of the control circuit of the regeneration factor, the resistance of which changes in such a way that compensates for the change in loss resistance introduced by the quartz resonator 3.

Claims

Claims of the invention: A controlled quartz oscillator containing an active part that is connected between the power bus and the common bus,

a series-connected crystal oscillator and frequency control circuit, which are connected between the active part input and the common bus, while the frequency control control input is connected

to the control bus, characterized in that. that, in order to expand the frequency tuning range and increase the amplitude stability of the output oscillations, serially connected

the first capacitor, the first varicap, the second capacitor and the second varicap, the other output of which is connected to the common bus, the first transistor, the emitter of which through the first resistor is connected to the power bus, and the collector of which through the serially connected first adjustable resistor and the second resistor is connected to the common bus , the third resistor, which is connected between the base of the first

transistor and common busbar, the first diode circuit, which is connected between the base of the first transistor and the power bus, the second transistor, the emitter of which is connected via the fourth resistor to the power supply bus, and the collector of which is connected via a serially connected second adjustable resistor and fifth resistor to the common bus , the sixth resistor, which is connected between the base of the second transistor and the common bus, the second diode circuit, which is connected between the power line and the base of the second transistor, the seventh resistor, which is turned on row control bus and the first connection point

an adjustable resistor with a second resistor, an eighth resistor, which is connected between the control bus and the connection point of the second adjustable resistor with a fifth resistor, the ninth resistor.

which is connected between the tap of the first adjustable resistor and the connection point of the first capacitor with the first varicap, the tenth resistor, which is connected between the tap of the second adjustable resistor and the connection point of the second capacitor with the second varicap, while the other end of the first capacitor is connected to the input of the active part.