SU660230A1 - Pulse modulator - Google Patents

Description

device, which through the grid resistor is connected to the movable contact of the bias resistor, and the cathode of the additional electrovacuum device is connected via the cathode resistor to the ground bus and to the voltage source.

The drawing shows a circuit diagram of a pulse modulator with control of the amplitude of the modulating pulses.

The proposed modulator contains two energy storage devices - inductive 1 and artificial long line 2, separated by diode 3, gas-filled modulator device 4, connected to the artificial long line 2 and used for its discharge, a key vacuum device 5, the anode of which is connected to the drive 1 , a pulse transformer 6, as well as an equating circuit, determining the duration of the charge of accumulator 1 and made in the form of a Kipp relay 7. In the KPP relay 7, one arm is formed of the screen and control grids and cathode of the device 5, and the second This is an additional electrovacuum device 8, the anode of which is connected to the control grid of the device 5 through a capacitor 9 connected to a resistor 10. The control grid of the EEC 8 is connected through a resistor 11 to the screen grid of the device 5 and through a grid resistor 12 with a variable resistor 13 bias connected to the input 14 of the control negative voltage, and the cathode resistor 15 of the charge circuit of the inductive energy storage device 1 is connected to the cathode of the SEC 8.

When a negative synchronizing pulse arrives at the input of the device 8, the Kip-relay 7 is transferred to a temporarily stable state in which the device 8 closes and the device 5 opens. When opening device 5 through an inductive drive 1, current flows, and energy will accumulate in it, the amount of which depends on the opening time of device 5, and the opening time of device 5 is determined by the duration of the temporarily stable state of the Kipp relay 7. The circuit from capacitor 9 and the resistor 10 is chosen such that the charging time of the capacitor 9 is longer than the time required to charge the storage device 1 to saturation. The transition from the temporarily stable state of the KIPP relay 7 to the stable state is carried out under the action of the increasing potential on the resistor 15 (included in the charge circuit of the storage device 1), which is created by the increasing current flowing through the storage device 1.

At a given potential on the control grid of device 8, device 5 will always close at the same current value in accumulator 1, i.e., a constant (stable) amount of energy Wh will be stored:

P-ULL,

where h is the inductance of the accumulator;

/ - charge current accumulator. When the potential on the control grid of the device 8 changes, the Kipp-relay 7 will overturn into a stable state at a different value of the inductance current.

Thus, by changing the potential on the control grid of the device 8, the amount of energy stored in the accumulator 1 will be controlled.

The energy stored in accumulator 1, after closing the device 5, passes through diode 3 into an accumulative artificial long line 2, creating a voltage on it proportional to the amount of energy stored in the accumulator:

-sie

W, KW ,, W,

and - 1,

where W is the energy accumulated in the tank of an artificial line;

K. — losses in the charge chain; С - artificial length

lines;

and - charge voltage of an artificial long line.

The use of new elements of a key electrovacuum device, a kinp-relay built on three electrodes of a key electrovacuum device, which simultaneously serves to charge an inductive energy storage device, favorably distinguishes the proposed pulse modulator from the prototype, as it acquires a new property - high-speed amplitude control of modulating pulses within wide limits, which significantly widens the scope of application of modulators and allows them to be used for microwave devices whose frequency is controlled by with amplitudoi modulating voltage (kvartsinotronov, carmatron, mntronov et al.).

Claims (1)

Invention Formula A pulse modulator containing a series-connected voltage source, an inductive energy storage device, a diode, an artificial long line and an output transformer, the anode of the gas discharge lamp is connected to the diode cathode, characterized in that, in order to control the amplitude of the modulating pulses over a wide range, into it A key electrovacuum device with at least two grids, the anode of which is connected to the diode anode, and the control circuit of the charge duration of the inductive energy storage device, built in the form of Kipp-p are introduced le, one arm of which is formed by a screen and the control grids and the cathode key electronic devices, and a second arm - additional electronic devices, the anode of which is controlled with soediien yupl.ey mesh key electronic devices via a condenser, a screen mesh key electronic devices connected through a resistor the control grid of the additional electrovacuum device, which is connected via a grid resistor to the base contact of the bias resistor, and the cathode of the additional electrovacuum device connected via a cathode resistor to the earth bus and to a voltage source.