SU1704273A1 - Device for cathode modulation of traveling-wave tube - Google Patents

Abstract

The invention relates to a pulse technique and can be used in rdd-transceiver radar. The purpose of the invention is to increase the stability of the amplitude of the output impulses of the phaxi nx with an ilmensurate duty cycle of 1 -,; pulses and improved; enche m & amp-size. The device for cathodic modulation of the LVV contains a source of rotting, a charging element2, a capacitive terminal, and a power supply. TWT 4, modulator lumina 5, diode 7. A source of 9 control pulses, P whose composition includes a submodule 10, a razpch m-grid resistor 11 and a bus 17 to start up. Introduction of the arrangement of elements 6, 0, 14, 15, and 15 allows the station to disengage the voltage of the capacitive capacitor with about 3 energy. 1 il. (L C e ““

Description

B

h

.

J

c | li

to

V

with

k & z

The invention relates to a pulse technique and can be used:: 2mo 8 radio devices; 1.

and /: lyo 1; ;; and is to increase the stability of the amplitude of the output pulses in modes with varying pulse duty cycle and to improve the m-size of the indicators.

From the drawing there is a basic electrical circuit device.

The device for cathodic modulation of the TWT contains a power source 1, a charging element 2, and a capacitive energy storage 3. TWT 4, modulator lamp 5, zlite 3 voltage, charge diode 7, key element 8, source 9 of control pulses, which includes submoderer 10, breaker resistor 11. bias source 12 and a coupling capacitor 13, an inverter 14. a comparator 15, a source 16 of the reference voltage, and a bus 17 for starting pulses.

The positive pole of the power source 1 is connected via the charging element 2 to the anode of pump 5 and the first output of energy storage 3, the second output of which is connected to the TWT 4 and the anode of diode 7. The cathode dioles 7 is connected to the common busbar via the key element 8 power supply 1 and the cathode of the lamp 5. whose control grid is connected to the output of the source of control pulses 9. The start-up pulse bus 17 is connected to the input of submodulator 10, the output of which is connected via a coupling capacitor to the output of source 9 of control pulses and the first terminal of resistor 11. The second terminal of resistor 11 is connected to the negative pole of bias source 12, the positive pole of which is connected to the common bus. Parallel to the lamp 5, the voltage divider is turned off, the output of which is connected to the direct input of the comparator 15, the inverse input of which is connected to the common bus through the source 16 of the reference voltage. The output of the comparator 15 through the inverter 14 is connected to the input of the key element 8.

A device for cathodic modulation of the TWT operates as follows.

In the initial state, in the absence of a trigger pulse at the input of the submodulator 10, the modular lamp 5 is locked with the voltage of the bias source 12. In the process of charging the energy storage device 3 from the power source 1 via the charging element 2 on the voltage divider 6, a time-increasing voltage is released. As long as the voltage taken from the output of the voltage divider 6 is less than the reference voltage, there is no voltage from the output of the comparator 15. From the output of the inverter 14, a positive voltage is applied to the drive of the key element 8. Key element 8 is open, The flow path of the charge current of the energy storage device 3 through the charging device D -...- OD 7. The storage device 3 is energized from the source 1 nutrition At some point in time, the neutral generator at the output of the voltage divider 6 exceeds the magnitude of the reference voltage Uori, as a result of which, on the comparator 15, the voltage is drawn, and at the output of the inverter 14, the voltage is zero. Key element 8 is closed. The charge on the capacitive energy storage 3 is terminated. The start impulse, received from bus 17 to the input of submodule 10, starts it. At the output of the submodule torz a control pulse is generated on the grid of the lamp 5. Lamp 5 opens and connects energy storage device 3 to TWT 4. A voltage pulse of stable amplitude independent of the pulse duty cycle is generated on TWT 4.

Upon completion of the start-up pulses, lamp 5 is turned off. During the pulse time, the voltage on the energy storage device 3 decreases. The voltage at the output of the voltage divider is lower than the reference voltage U0n, as a result of which there is no voltage at the output of the comparator 15, z key element 8 is turned on. There is a charge for the accumulator 3 of energy from the source 1 of the power supply.

In the following, the processes in the device are repeated.

Claims (1)

Claims Device for cathode modulation TWT. containing a power source, the positive pole of which through the charging element is connected to the anode of the modulator lamp and the first output of the capacitive energy storage, the second terminal of which is connected to the anode of the charging diode and the TWT cathode, the anode of which is connected to the negative pole of the power source and the cathode of the modulator lamp , the control grid of which is connected to the output of the source of control pulses, distinguishes ui.ee- in order. that, with the aim of increasing the stability of the amplitude of the output pulses in modes with varying pulse duty cycle and improving the mass and indicators, a voltage divider, a comparator, an inverter, a key element and a source of a reference voltage are introduced into it, the voltage divider being connected parallel to the modulator lamp, its output is connected to the forward input of the comparators. the inversion of which is connected to the on-connected to the by-pass of the key element, the Koschey Chycho Cherot source of the reference voltage — the second is connected between the charging cathode, and one through the inverter diode and common busbar.