SU1677847A1 - Output stage of a generator unit - Google Patents

Abstract

The invention relates to a pulse technique and is intended for use in generator devices of high-frequency geoelectromagnetic, radar and communications. The purpose of the invention is to increase the temporal stability of the output pulses - achieved by the fact that the transformer 7 of start pulses with 4-6 windings, the driver 8 of the start pulses and the delay line 9 are inserted into the known output stage of the generator device. The output stage also contains a transformer 1 reference pulses, matching resistors 2,3 S-diode 10 and resistor 11. 2.il.

Description

1

The invention relates to a pulse technique and is intended for use in generator devices of high-frequency geoelectromagnetic, radar and communications.

The aim of the invention is to increase the temporal stability of the output pulses.

FIG. 1 shows a functional diagram of the device; FIG. 2 is a timing diagram explaining its operation.

The output stage of the generator device contains a transformer 1 of reference pulses, the primary winding connected to the input terminals and the secondary one - to the output circuit containing matching resistors 2,3, second 4, first 5 and third 6 windings of the transformer 7 start pulses, driver 8 trigger pulses, the input of which is connected to the input terminals through a delay line 9, and the output is connected to the winding 5 of the transformer 7 trigger pulses, S-diode 10, resistor 11 (ZH).

The output stage operates as follows.

The rectangular video pulses U (t) enter the primary winding of the transformer 1 of the reference impulses (Fig. 2a). These same pulses through line 9 delay (Fig.26) are fed to the input of the imaging unit 8 pulses. From the secondary winding of the transformer 1, the reference pulse with amplitude increased by n times (n is the transformation ratio of transformer 1) is fed to the S-diode 10 through the terminating resistors 2 and 3 and the windings 4 and the transformer 7 of the trigger pulses. The S-diode also receives start-up pulses supplied to the primary winding of the transformer 7 from the output of the start-up pulse former.

Claims (1)

The use of a transformer 7 with a transmission coefficient close to, 1 makes it possible to transfer the nano-second front of the trigger pulses from the driver 8 without significant blockages. Under the action of the reference pulse, the voltage on the resistor 11 (ZH) and, therefore, on the S-diode increases exponentially, but does not reach the value of the S-diode breakdown (Fig. 2d). When a trigger pulse appears, the total voltage on an S-diode having a high slew rate exceeds the value of the threshold voltage of the S-diode, which during breakdown goes into a state characterized by a low internal voltage, resulting in a voltage drop of short duration front. The achieved stability value of the output pulse is a 25 ps. Claims of the invention An output stage of the generator device containing a reference pulse transformer, primary connected to the input terminals, and the secondary to the output circuit containing the first matching resistor, S- a diode and a second terminating resistor, characterized in that, in order to increase the temporal stability of the output pulses, a trigger driver was inserted, the input of which is connected via a delay line with the input terminals, and the output is connected to the primary winding of the start-up pulse transformer, the second and third windings of which are included in the output circuit, the second winding being connected between the first matching resistor and the S-diode cathode, and the third winding between the second matching resistor and the anode S- diode. but 2