SU509986A1

SU509986A1 - Oscillating frequency oscillation series generator

Info

Publication number: SU509986A1
Application number: SU2053990A
Authority: SU
Inventors: Владимир Петрович Зотов; Герман Николаевич Решетников; Лидия Федоровна Бессуднова
Original assignee: Предприятие П/Я Х-5734
Priority date: 1974-08-13
Filing date: 1974-08-13
Publication date: 1976-04-05

Description

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Изобретение относитс к импульсной технике и может найти применение в измерительных устройствах на СВЧ.The invention relates to a pulse technique and can be used in microwave measuring devices.

Известен генератор серий колебаний качающейс частоты, содержащий генератор качающейс частоты, основной выход которого подключен через регул тор уровн мощности ко входу направленного ответвител , один выход которого соединен со входом терморезисторного датчика, выход которого no ключен через самобалансирующийс мостовой усил.тель ко входу цепи обратной св зи и к одному входу первого устройства сравнени Второй вход устройства сравнени подключен к первому источнику опорного напр жени , а вьрюд через усилитель и сумматор - ко входу управлени регул тора уровн мощности.A known generator of oscillations of oscillating frequency, containing oscillator of oscillating frequency, the main output of which is connected through a power level regulator to the input of a directional coupler, one output of which is connected to the input of a thermistor sensor, the output of which is connected through a self-balancing bridge amplifier and to one input of the first comparison device. The second input of the comparison device is connected to the first reference voltage source, and the output through the amplifier and the adder is connected to in controlling the power level controller of the torus.

Такие генераторь серий колебаний качающейс частоты имеют малое быстродействие и невысокую точность стабилизации выходного сигнала.Such oscillators of series of oscillations of oscillating frequencies have a low speed and low accuracy of stabilization of the output signal.

В предложенном генераторе указанные недостатки устранены за счет того, что в генератор введены последовательно соединенные друг с другом второе устройство срав- In the proposed generator, these drawbacks are eliminated due to the fact that the second device is connected in series with the generator

нени с зоной нечувствительнсюти, один вхФд I которого соединен со вторым источником 1 опорного напр жени , а другой вход - с вь iходом первого устройства сравнени , ревер |сивный счетчик, счетйый вход которого подI ключен к низкочастотному выходу генерато- : ра качающейс частоты, цифроаналоговый преобразователь и дискретный усилитель, I выход которого подсоединен ко второму вхО1ду сумматора.It is connected with the second source 1 of the reference voltage and the other input with the input of the first comparison device, a reverse counter, the input of which is connected to the low-frequency output of the sweeping frequency generator, digital-analogue a converter and a discrete amplifier, whose I output is connected to the second input of the adder.

; Блок-схема предложенного генератора серий колебаний качающейс частоты показа.на на.чертеже.; The block diagram of the proposed generator of oscillations of the oscillating frequency series is shown on the drawing.

Claims

The generator of oscillations of the oscillating frequency consists of a generator 1 of oscillating {s frequency, a power level regulator 2, a directional coupler 3, a thermistor sensor 4, a self-balancing bridge amplifier 5, the first comparison device 6, the amplifier 7, the adder 8, the second comparison device 9 with dead zone, reversible counter Yu, digital-analogue conversion.) pad 11, disk-. I retro amplifier 12, the first 13 and; 14 sources of reference voltage. Comparison device 9, reversible counter 10, high-analog:; P | A discrete gel 11, a discrete amplifier 12, an adder 8 connected between the amplifier 7 and the controller 2, form an additional discretely tunable auto-regulation channel. In this circuit, the channel (coarse (discrete) and exact discrete channels work in parallel: the discrete channel mainly performs power gain and reproduction at the output of the low-frequency components of the spectrum of the useful signal. The discrete channel is tuned in such a way that it is possible for it to go down to 0% of the total control power. In the exact channel, only up to 10% of the control power is generated, which makes it possible to increase the gain of the microwave power stabilization system (the exact channel). The generator of a series of oscillations of the oscillating frequency operates as follows. Roughly, the largest amplitude of the error signal is determined at which the full dynamic adjustment range of the stabilized output power P. is provided in the operating frequency range. By the comparison device 9, which has upper and lower limits of the matchpoint, the reversible counter 10 is set to the addition or subtraction mode. For the operation of the reverse counter 1O in the subtraction mode, the lower threshold of the comparison circuit is adjusted to the amplitude J, "(ooo. For the reverse counter to operate in the addition mode, the upper threshold of the circuit is adjusted to the amplitude Uj. KC. When the generator is operating in pulsed or continuous mode at the output of the first comparator device 6, an error signal Ц is generated, relative to the set voltage level of the power level control and If this voltage is greater than Ud or me nec the comparison device 9 sends a signal to the reversible counter 1O, This will produce counting in the direction of addition or subtraction depending on whether the error signal is greater or less than the value. At the output of the analogue voltage converter, the voltage will change discretely until controller 2 sets the output of the first comparator j6 of an accurate channel: error signal in the deadband of the coarse channel. The coarse channel should allow the output microwave power level to be adjusted throughout the entire dynamic range with a step resolution of 5-10%. One of the advantages of the proposed. generator is the possibility of stabilization of microwave power pulses, the duration of which can be reduced to the duration of the two-channel transient process | systems that are more than an order of magnitude less | for the impulse that can be: - beilized with a single-channel system. This is achieved by increasing the overall gain of the VHF stabilization system and the low amplitude of the transient process (no more than 10-15% of the established value). Another advantage is the possibility of stabilization of microwave power pulses, the duty cycle of which varies in a very wide range, since the stabilization system allows you to remember the level of the previous pulse, keeps the power regulator at an energy level corresponding to the amplitude of the previous pulse. The formula of the invention Generator of oscillations of oscillating frequency, containing oscillator of oscillating frequency, the main output of which is connected through a power level regulator to the input of a directional coupler, one output of which is connected to the input of a thermoresi detector, the output of which is connected via a self-balancing bridge amplifier to the input of the reverse circuit connection to one input of the first comparison device, the second input of which is connected to the first reference voltage source, and the output through the amplifier and the adder to the input Control of the power level regulator, characterized in that, in order to increase the speed and accuracy of the stabilizer; output signal, a second comparison device with a deadband, one input of which is connected to a second source of the reference voltage, and another input to an output of the first input, which is connected to to a low-frequency generator of the oscillating frequency generator, a digital-to-analog converter and a discrete amplifier, the output of which is connected to the second input of the adder.

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