SU965002A1

SU965002A1 - Device for automatic single control of frequency

Info

Publication number: SU965002A1
Application number: SU802903326A
Authority: SU
Inventors: Александр Николаевич Гребенюк; Владимир Иванович Мамонов; Владимир Иванович Щирба
Original assignee: Производственное Объединение "Электрон"
Priority date: 1980-04-02
Filing date: 1980-04-02
Publication date: 1982-10-07

Description

Изобретение относитс к радиотехнике и может быть использовано в системах св зи дл начальной синхронизации при передаче дискретных сообщений, в частности в системах .передачи цифровой и телеметрической информации с импульсно-кодовой модул цией .The invention relates to radio engineering and can be used in communication systems for initial synchronization in the transmission of discrete messages, in particular in systems for the transmission of digital and telemetry information with pulse-code modulation.

Известно, устройство тактовой синхронизации , содержащее последовательно соединенные эталонный генератор и фазовый детектор, подстраиваемый генератор, формирователь импульсов и цифровой интегратор 1.It is known that a clock synchronization device comprising a series-connected reference oscillator and a phase detector, a tunable oscillator, a pulse shaper, and a digital integrator 1.

Однако это устройство не обеспечивает достаточной полосы захвата, частоты.However, this device does not provide sufficient bandwidth, frequency.

Наиболее близким к предлагаемому изобретению вл етс устройство дл автоматической однократной подстройки частоты, содержащее последовательно соединенные инвертор, первый элемент совпадени , ключ, подстраивае-. м й генератор и цифровой интегратор, .к другому входу которого подключен выход эталонного генератора через фазовый дискриминатор, выход подстраиваемого генератора подключен к входу формировател импульсов, а также второй элемент совпадени С 2.The closest to the proposed invention is a device for automatic one-time frequency control, containing a series-connected inverter, the first element of the match, the key, the tuning. a generator and a digital integrator, to another input of which the output of the reference generator is connected via a phase discriminator, the output of the adjustable generator is connected to the input of the pulse generator, and the second coincidence element C 2.

Однако и это устройство не обеспечивает достаточной полосы захвата частоты.However, this device does not provide sufficient frequency bandwidth.

Цель изобретени - расширение рабочей полосы захвата.The purpose of the invention is the expansion of the working capture band.

Поставленна цель достигаетс тем, что в устройстве дл автоматической однократной подстройки частоты , содержгицем последовательно сое10 диненные инвертор, первый элемент совпадени , ключ, подстраиваемый генератйр и цифровой интегратор, к другому входу которого подключен выход эталонного генератора через. This goal is achieved by the fact that in the device for automatic one-time frequency control, the inverter, the first element of the match, the key, the adjustable generator and the digital integrator, the output of the reference generator through, are connected to another input.

Claims

15 control element, the output of the adjustable oscillator is connected to the input of the pulse former, and the second coincidence element, the output of the control element is connected via the pulse former to the first input of the second coincidence element to the second input of which the output of the reference generator is connected connected to the input of the inverter, the output of the second matching element is connected to the corresponding input of the digital integrator, the output of which is connected to another input of the first match element. The drawing shows the structures on the scheme of the proposed device. The device for automatic frequency adjustment contains a reference oscillator 1, adjust oscillator 2, pulse shaper 3, digital integrator 4, second matching element 5, invert b, key 7, control element 8, first matching element 9. The device operates as follows. In the initial state, the output of the control element 8 to the installation inputs of the pulse generator 3 and the digital integrator 4 receives a logical zero, as a result of which the logical zero is also set at their outputs. Consequently, in the initial state, from the output of the digital integrator, a logical zero arrives at the second input of the first element of coincidence 9, and from the output go, to the control input of the key. 7. In this case, the key 7 is closed and the frequency of the output voltage of the adjustable oscillator 2 is equal to the minimum frequency f of the switch. With the inclusion of the reference generator, the frequency unit fgr is set to the logical unit at the output of the control element 8. As a result, the digital integrator 4 is removed from the arresting device, and the pulse shaper 3 generates a positive right-angle pulse of duration f. At the same time, from the other output of the pulse generator 3, through the second coincidence element 5, the input of the digital integra EfeTopa 4 receives m tuF rectangular pulses with a differential frequency DR f Hiiv Connecting the output of the pulse shaper 3 through the inverter b to the D coincidence element E denies the time Tg passing the control voltage to the switch 7, which ensures that the frequency of the output voltage of the adjustable oscillator 2 remains unchanged during the adjustment period. As a result, a digital equivalent of the frequency of the D.P. frequency is written to the digital integrator 4. After time t logical zero, the input from the output of the pulse generator 3, prohibits the passage of the pulses of the differential frequency DG to the input of the digital integrator 4 and allows the output signal to pass through the first element of coincidence 9 The output rectangular PWM voltage has a period determined by the capacity of the digital integrator 4, the frequency of the adjustable oscillator 2, and the modulation depth is determined by the difference of the frequencies of the reference oscillator 1 and the adjustable oscillator 2. Entry into the control circuit of the key 7, the control voltage l is temporarily connected to the time the drive circuit being adjusted generator 2, so that time ,, when the switch 7 is open, its frequency is increased to a value, f. and decreases to f when key 7 is closed. After time f, the average frequency fpp of the adjustable oscillator 2 is equalized with a certain error with the frequency fg of the reference oscillator 1 and is determined by the expression .U-r ,. where Q is the average for the period of the follow PWM voltage ratio. The proposed device allows the frequency control of the known device to be expanded. Apparatus of the Invention A device for automatic one-time frequency adjustment comprising an inverter connected in series, a first coincidence element, a key, an adjustable oscillator, and a digital integrator, to the other input of which the output of the reference oscillator is connected via a control element, the output of the adjustable oscillator, and also the second element of coincidence, which is different from the fact that, in order to expand the working capture band, the output of the control to the whole element through the driver the pulses are connected to the first input of the second coincidence element, to the second input of which the output of the reference generator is connected through a pulse shaper, the output of which is connected to the input of the inverter, the output of the second, the matching element is connected to the corresponding digital input, the output of the second digital input match element. Sources of information taken into account when examining 1. Phase-locked loop systems with discretization elements. Ed. V.V. Shahgild on. M., Sw., 1979, p. 152, fig. 4. 29.

2. USSR author's certificate on application 2824467 / 18-09, cl. H 04 L 7/10, 1979 (prototype).