SU1706021A1 - Pulse generator - Google Patents

Abstract

The invention relates to a pulse technique and can be used to create powerful pulse generators of the nanosection range. The purpose of the invention, an increase in speed, is achieved by reducing the rise time of the current in the load. The formation of the pulse front occurs when the thyristor switch is previously turned on, which eliminates the limitation on the speed of the inertial thyristor. The pulse shaper contains a capacitive energy store 1, a bib 2, a thyristor switch 3, a switch control unit, a capacitor 5, a pulse generator 6, a drift diode 7, a control pulse delay unit 8. 2 Il.

Description

4 O O O N3

The invention relates to a pulse technique and can be used to create powerful pulse generators of the nanosecond range.

The purpose of the invention is to increase the speed by reducing the rise time of the current in the load.

Figure 1 shows the functional diagram of the pulse generator; 2 is its schematic diagram.

The pulse shaper contains a capacitive energy storage 1, a load 2. a thyristor switch 3, a switch control unit 4, a capacitor 5, a pulse generator 6, a drift diode 7, a control pulse delay unit 8, a pulse transformer 9 of a switch control unit, a pulse transformer 10, a thyristor 11 capacitor 12. resistor 13, choke 14.

The device works as follows.

In the initial state, the capacitive energy storage 1 and the capacitor 5 are charged from a pulsed power source (not shown) to a voltage UH. almost equal to the amplitude of the voltage pulse in the load. In this case, the thyristor switch is under voltage UH in a state of high resistance. The current through the drift diode (in the device, a chain of series-connected drift diodes can be applied with a sharp recovery of the reverse resistance) and the voltage drop across the diode is zero. After the external trigger pulse arrives at the input of the pulse generator 6 and the control pulse delay unit 8, pumping of the drift diode 3 begins. Pulse pumping provides a higher rate of recovery of the reverse resistance of the drift diode 3. Structurally, the pulse generator 6 must be removed from the circuit formed by the capacitor 5 by the switch 3 and a drift diode 7, and connected in parallel with the drift diode 7 to provide the minimum parasitic inductance of said circuit. The control impulse delay unit 8 ensures the flow of reverse current immediately upon completion of the pump pulse.

After the application of an external trigger pulse, the thyristor switch 3 is turned on and through it the diode 7 also flows the discharge current of the capacitor 5, since

the latter is large enough, then during the transition process the charge of the capacitor decreases by no more than 10%.

Thus, the voltage on the condensate. The mat 5 and the thyristor switch 3 remain almost constant. In addition, when you turn on the thyristor switch 3, the current through the load 2 does not leak, because. it is connected between two capacitors charged to the same voltage.

Due to the flow of reverse current through the drift diode 7, the latter sharply restores its resistance and a voltage is applied to the load, to which the capacitive storage 1 is charged.

energy.

Claims (1)

An inventive pulse shaper comprising an input terminal connected in series with a capacitive energy storage device, a load and a thyristor switch, the control electrode of which is connected to the output of the switch control unit, which is characterized by the fact that, in order to increase speed by reducing the current rise time load, a capacitor, a drift diode, a pulse generator, and a pulse delay control unit are introduced into it, and the input of the unit control switch through the control pulse delay unit connected to the input terminal and the input pulse generator, the output of which is connected to the first pins of the drift diode and a capacitor, the second terminals of which are connected respectively to the first and second terminals of the thyristor switch. FIG. 2