SU845262A1

SU845262A1 - Multifrequency generator

Info

Publication number: SU845262A1
Application number: SU782615100A
Authority: SU
Inventors: Анатолий Васильевич Рыжков; Евгений Александрович Сластунов; Вячеслав Иванович Хализов
Original assignee: Войсковая Часть 25871
Priority date: 1978-05-15
Filing date: 1978-05-15
Publication date: 1981-07-07

Description

Изобретение относится к радиотехнике и может быть использован для формирования сетки частот в приемо.передающей аппаратуре связи и измери- _ тельной технике. ^э The invention relates to radio engineering and can be used to form a frequency grid in the receiving and transmitting communication equipment and measuring equipment. ^uh

Известен многочастотный генератор частот, содержащий последовательно /соединенные эталонный генератор и блок высокочастотной подставки,а также η-l блоков фазовой автоподстройК1и частоты (ФАПЧ) , каждый из которых состоит из соединенных в кольцо управляемого генератора, смесителя, фазового детектора и фильтра нижних частот Г1]. 15A multi-frequency frequency generator is known, comprising a series-connected reference generator and a high-frequency stand unit, as well as η-l phase-locked K1 and frequency (PLL) blocks, each of which consists of a controlled oscillator, mixer, phase detector and low-pass filter G1 connected to a ring] . fifteen

Однако такому генератору присуще недостаточное подавление паразитных побочных колебаний, особенно при малом шаге частот. Цель изобретения - повышение спек- 20 тральной чистоты формируемых частот.However, this generator is characterized by insufficient suppression of spurious side vibrations, especially at a small frequency step. The purpose of the invention is to increase the spectral purity of the generated frequencies.

Это достигается тем, что в многочастотном генераторе для формирования η частот, содержащем последовательно соединенные эталонный генера- 25 тор и блок формирования высокой частоты, а также η-l блоков ФАПЧ, каждый из которых состоит из соединенных в кольцо управляемого генератора, смесителя, фазового детектора и 30 фильтра нижних частот, причем выход блока формирования высокой частоты и выходы управляемых генераторов являются выходами устройства, блок формирования высокой частоты формирует частоту fj , где I =-у- при η четном и i = ^L при η нечетном, каждый к-тый выход' многочастотного генератора, удовлетворяющий условию lik^i, соединен со вторым входом смесителя блока ФАПЧ, формирующего частоту выход которого соединен со вторым вхо дом смесителя блока ФАПЧ, формирующего частоту , между выходом эталонного генератора и вторыми входами фазовых детекторов блоков ФАПЧ, формирующих частоты , . . . , , включен умножитель частоты с коэффициентом умножения n-1+l, а между выходом эталонного генератора и вторыми входами остальных фазовых детекторов умножитель частоты с коэффициентом умножения n-i.This is achieved by the fact that in a multi-frequency generator for generating η frequencies, containing in series a reference generator 25 and a high-frequency generating unit, as well as η-l PLL units, each of which consists of a controlled oscillator, mixer, phase detector connected to a ring and 30 low-pass filters, the output of the high-frequency generating unit and the outputs of the controlled generators being the device outputs, the high-frequency generating unit forms the frequency fj, where I = -y for η even and i = ^ L for η odd m, each output of a multi-frequency generator satisfying the condition lik ^ i is connected to the second input of the PLL mixer, which forms the frequency, the output of which is connected to the second input of the PLL mixer, which forms the frequency, between the output of the reference generator and the second inputs of phase detectors PLLs forming frequencies. . . ,, a frequency multiplier with a multiplier of n-1 + l is turned on, and between the output of the reference generator and the second inputs of the remaining phase detectors, a frequency multiplier with a multiplier of n-i.

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На чертеже изображена структурная функциональная электрическая схема Предлагаемого многочастотного генератора .The drawing shows a structural functional electrical circuit of the proposed multi-frequency generator.

Многочастотный генератор содержит 'последовательно соединенные эталонный генератор 1 и блок формирования высокой частоты 2, а также п-1 блоков ФАПЧ 3, каждый из которых состоит из соединенных в кольцо управляв- ε мого генератора 4, смесителя 5, фазового детектора б и фильтра нижних частот 7. Выход блока формирования высокой частоты 2, формирующего частоту Ц , где ί =Д~при η - четном и 10 при п_с нечетном, и выходы управляемых генераторов 4 являются выходами устройства. Каждый к-тый выход многочастотного генератора, удовлетворяющий условию lsk^i, соединен со вто- 15 рым входом смесителя блока ФАПЧ, формирующего частоту , выход которого соединен со вторым входом смесителя блока ФАПЧ, формирующего частоту · Выход эталонного гене- 20 ратора 1 соединен со вторыми входами фазовых детекторов блоков ФАПЧ, формирующих частоты ....., через умножитель частоты 8 с коэффициентом умножения η-i+l, а со вторыми входа- 25 ми остальных фазовых детекторов - через умножитель частоты 9 с коэффициентом умножения n-i.The multi-frequency generator contains a reference oscillator 1 connected in series and a high-frequency generating unit 2, as well as n-1 PLL units 3, each of which consists of a controlled ε generator 4, a mixer 5, a phase detector b, and a low-pass filter 7. The output of high frequency forming unit 2 that forms the frequency c, where ί = D ~ at η - 10 is even and when n is odd, _with and controlled oscillators 4 outputs are the outputs of the device. Each of the outputs of the multi-frequency generator satisfying the condition lsk ^ i is connected to the second input of the mixer of the PLL that forms the frequency, the output of which is connected to the second input of the mixer of the PLL that forms the frequency · The output of the reference generator 20 is connected to the second inputs of the phase detectors of the PLL blocks forming the frequencies ..... through a frequency multiplier 8 with a multiplication factor η-i + l, and with the second inputs of the 25 other phase detectors through a frequency multiplier 9 with a multiplication factor ni.

Устройство работает следующим образом. 2QThe device operates as follows. 2Q

Мно)?очастотный генератор формирует η частот. При этом колебание эталонного генератора 1 поступает на блок формирования высокой частоты 2, который формирует частоту fj , где i =-^- при п четном и i при η нечетном. На вторые входы фазовых детекторов блоков ФАПЧ, формирующих частоты f, , . . . , , колебание эталонного генератора 1 поступает через 40 умножитель частоты 8 с коэффициентом умножения η-i+l, а на вторые входы фазовых детекторов блоков ФАПЧ, формирующих частоты .....ίη, - через умножитель частоты с коэфФициентом умножения n-i. Частоты Ц , . . . , являются понижающими для блоков ФАПЧ, формирующих частоты , ..., f _n» которые, в свою очередь, являются понижающими ДЛЯ блоков ФАПЧ, формирующих частоты f , ..., _л . Выход блока формирования высокой частоты и выходы управляемых генераторов являются выходами устройства.Many)? The frequency generator generates η frequencies. In this case, the oscillation of the reference generator 1 is supplied to the high-frequency generation unit 2, which generates the frequency fj, where i = - ^ - for n even and i for η odd. At the second inputs of the phase detectors of the PLL blocks forming the frequencies f,,. . . ,, the oscillation of the reference generator 1 is supplied through a 40 frequency multiplier 8 with a multiplication factor η-i + l, and to the second inputs of the phase detectors of the PLLs forming the frequencies ..... ίη, through a frequency multiplier with a multiplication coefficient ni. Frequencies c. . . , are step-down for the PLL blocks, forming the frequencies, ..., f _n ”which, in turn, are step-down FOR the PLL blocks, forming the frequencies f, ..., _l . The output of the high-frequency generating unit and the outputs of the controlled generators are the outputs of the device.

* Многочастотный генератор, в котором происходит строго определенное 55 включение блоков ФАПЧ, обеспечивающее максимально высокие частоты сравнения на фазовых детекторах обладает высокими качественными характеристиками выходных колебаний, а именно: увеличение частоты сравнения в n-i раз на фазовых детекторах при затухании в полосе замкнутой цепи блока ФАПЧ х дБ/οκτ. обеспечивает дополнительное подавление частоты сравнения и ее гармоник в спектре выходных колебаний на x.log^Cn-i) дБ; далеко отстоящие от несущих побочные составляющие могут быть отфильтро ваны дополнительно, например, в синтезаторах частоты последующими трактами без снижения быстродействия;* A multi-frequency generator, in which the PLL blocks is strictly defined 55, which ensures the highest possible comparison frequencies at phase detectors, has high quality characteristics of output oscillations, namely: an increase in the comparison frequency by ni times on phase detectors during attenuation in the closed-loop bandwidth of the PLL block x dB / οκτ. provides additional suppression of the comparison frequency and its harmonics in the spectrum of output oscillations at x.log ^ Cn-i) dB; side components far removed from the carriers can be additionally filtered, for example, in frequency synthesizers by subsequent paths without reducing performance;

ослабляются требования к температурной стабильности частоты управляе мых генераторов, (Расширение полос ФАПЧ.the requirements for temperature stability of the frequency of controlled generators are weakened, (PLL extension.

так как возможно захвата в блокахsince it is possible to capture in blocks

Claims

The invention relates to radio engineering and can be used to form a grid of frequencies in receiving transceiver communication equipment and measuring technology. A multi-frequency frequency generator, containing a series-connected reference generator and a high-frequency stand block, as well as n-vl blocks of phase self-tuning and frequency (PLL), each of which consists of a controllable oscillator, mixer, phase detector and low-pass filter Dl. However, such a generator is characterized by insufficient suppression of parasitic side oscillations, especially with a small frequency step. The purpose of the invention is to increase the spectral purity of the generated frequencies. This achieves Tc in that in a multi-frequency generator to form n frequencies, containing a series-connected reference oscillator and a high frequency shaping unit, as well as n-1 PLL blocks, each of which consists of a connected oscillator, a controlled oscillator, a mixer to low-pass filter detectors, with the output of the high-frequency shaping unit and the outputs of the controlled oscillators being the outputs of the device, the high-frequency shaping unit generating -I- at the frequency f. where n is even and when n is odd, each k-th output of a multi-frequency generator satisfying the condition is connected to the second input of the mixer of the PLL, which generates a frequency) whose output is connected to the second input of the mixer of the PLL, which forms the frequency between the reference output the generator and the second inputs of the phase detectors of the PLL blocks that form the frequencies f,,,. . , f, a frequency multiplier with a multiplication factor of n-1 + 1 is switched on, and between the output of the reference oscillator and the second inputs of the other phase detectors, a frequency multiplier with a multiplication factor of n-i. The drawing shows a structurally functional electrical circuit of the proposed multi-frequency g-knob. A frequency-frequency generator contains a series-connected reference generator 1 and a high-frequency forming unit 2, as well as p-1 FLPCH 3 blocks, which consist of a controllable generator 4, a mixer 5, a phase detector b, and a bottom filter 7 connected in a ring The output of a high frequency shaping unit 2, which forms a frequency where |. For n is even and | for n odd, and the outputs of the controlled oscillators 4 are the outputs of the device. Each k-th output of the multi-frequency generator, satisfying the condition, is connected to the second input of the mixer of the FLPC unit, which generates a frequency, the output of which is connected to the second input of the mixer of the FLPC unit, which forms the frequency f. The output of the reference generator 1 is connected to the second inputs of the phase detectors of the PLL units, forming frequency frequencies over frequency multiplier 8 with the multiplication factor n-i + 1, and with the second inputs of the other phase detectors through frequency multiplier 9 with multiplying factor n-i. The device works as follows. Multifrequency generator generates n frequencies. In this case, the oscillation of the reference generator 1 is fed to a high-frequency forming unit 2, which generates the frequency f, -, where I-3 - with r-even and, - with p 4 j ™ ir (1 S. IChDi 1GD G l To the second inputs of the phase detectors of the FLPCH blocks that form the frequencies f,,..., ff--, the oscillation of the reference generator 1 enters through the frequency multiplier 8 with the multiplication factor n-i + l, and to the second inputs of the phase detectors of the blocks The FDCH forming the frequencies tf a frequency multiplier with a multiplication factor rs-i. The frequencies f, ..., f are down-links for the block Frequency-dependent fpshs that form frequencies f,, fnc are, in turn, decreasing for the fsrc frequency blocks that form f, ..., the output of the high frequency shaping unit and the outputs of the controlled oscillators are the outputs of the device. The multi-frequency generator, in which there is a well-defined inclusion of PLL blocks, ensuring the highest possible frequencies of comparison on phase detectors, has high quality characteristics of output oscillations, namely: an increase in the frequency of comparison ni times on the phase detector when the attenuation band in a closed circuit FLPCH block X dB / oct. provides additional suppression of the reference frequency and its harmonics in the output oscillation spectrum by x.log (n-i) dB; far away from the carrier side components can be further filtered, for example, in synthesizers, by subsequent paths without slowing down; The requirements on the temperature stability of the frequency of the controlled oscillators are weakened, since it is possible to expand the capture bands in the FHF units. Claims of the Invention A multi-frequency generator for generating p frequencies comprising a series-connected reference generator and a high frequency shaping unit, as well as n-1 phase-locked loop (FLPC) units, each of which consists of a ring-controlled generator, a mixer, a phase detector and low-pass filter, and the output of the high-frequency shaping unit and the outputs of the controlled oscillators are the outputs of the device, which is characterized by the fact that, in order to increase the spectral frequency of the frequency, the high frequency shaping unit forms the frequency f,, where i for n even and n odd, each output of the multi-frequency oscillator satisfying the condition is connected to the second input of the mixer FLPCH, which forms the frequency f | .j, the output of which is connected to the second input of the mixer of the FLPCH block, which forms the frequency f, between the output of the reference generator and the repeaters and the inputs of the phase detectors of the FLPC blocks that form the Frequencies f, .... f i - t, includes the frequency multiplier with the multiplication factor n-i + 1, and between reference output the generator and the second inputs of the remaining phase detectors — a frequency multiplier with a multiplication factor n-i. Sources of information taken into account in the examination 1. Patent SSL No. 3696306, cl. 331-2, 03.10.72 (prototype).