SU974561A1 - Pulse shaper - Google Patents

Description

(54) PULSE FORMER

one

The invention relates to a pulse technique and can be used in radio engineering equipment and CIS automation subject for producing pulses with an amplitude greater than the voltage of the power source.

A pulse shaper is known that contains cells with storage capacitors, one of the plates of which is connected to the anode of the corresponding diode and the emitter of the subsequent key transistor, and the other to the collector of the previous key transistor, the emitter of the first transistor and the cathodes mentioned directly, and the bases of the other key transistors through a resistor connected to the common bus P1,

The disadvantage of this driver is the absence of an increase in the duration of the output signal relative to the input trigger pulse.

The closest technical solution to the invention is a pulse shaper containing n series-connected cells, each of which contains a transistor connected in a common base circuit and a capacitor, one plate of which is connected to the emitter of the subsequent transistor and a diode, the other output of which is connected to common

10 by a power supply bus, another capacitor plate is connected to the charging diode and collector of the previous cell transistor, an input transistor whose collector is connected to the cathodes of charging filters of diodes 2.

The disadvantages of such a former are the short duration of the output pulse.

Claims (2)

The purpose of the invention is to increase the duration of the output pulse in the shaper with the amplitude of the output pulse 39 greater than the voltage of the power source. This goal is achieved by the fact that a pulse shaper containing n series-connected cells, each of which contains a transistor connected in a common base circuit and a capacitor, one plate of which is connected to the emitter of the subsequent transistor and a diode, the other output of which is connected to the common the power supply bus, another capacitor plate is connected to the charging diode and the collector of the previous transistor of the cell, the input transistor, an additional power supply and a transistor, a collector cat The secondary is connected to the bus of an additional power source connected through a resistor to its base unit, which is connected to the emitter of the input transistor and the emitter of the transistor of the first cell connected to the input bus, the collector of the input transistor is connected to the power source, and the base through the resistor bus, moreover, the emitter of the additional transistor is connected to other terminals of the charging diodes. The drawing shows a schematic representation of the device. The device contains the source of input pulses 1 with its internal or external resistance 2, transistors, voltage sources 9 and 10, capacitors I-1, diodes 15 22, resistors. Moreover, the diodes 15, 17, 19, 21 are charged, the transistor 7 is additional, and the transistor 8 is input, the power source 9 is additional. In the absence of a pulse, the transistors and 8 are locked, and the transistor is saturated and the II-H capacitors charge from source 9 through the saturated transistor 7, the diodes to a voltage approximately equal to the voltage of source 9. When a pulse arrives from the source of input pulses 1, transistor 3 opens and the transistor 7 is closed. The remaining transistors are also opened by residual voltages on the capacitors 11-14. The capacitors 11-1 are connected in series and are discharged through a resistor 26 and, a base-emitter junction of the transistor 8. This causes the emitter current of the transistor 8 and the emitter of the transistor 3 to flow, resulting in an output pulse formation, despite the termination of the pulse at the input until the capacitors are discharged. After the formation of the output pulse is completed, the transistor 8 closes and the transistor 7 opens, and since the diodes 15-20 have little resistance when charging capacitors, the charge-time constant decreases, which in turn reduces the duty ratio. In addition, diodes 15-20 prevent the discharge of capacitors through side circuits, which increases the efficiency of the pulse shaper. Invention A pulse shaper comprising n series-connected cells, each of which contains a common base transistor and a capacitor, one plate of which is connected to the emitter of the next transistor and a diode, the other output of which is connected to the common power supply bus, another plate the capacitor is connected to the charging diode and collector of the previous transistor of the cell, the input transistor, characterized in that, in order to increase the duration of the output pulse, in it The additional power sources and the Transistor, whose collector is connected to the additional power supply bus connected through a resistor to its base, which is connected to the emitter of the input transistor and the emitter of the first cell transistor connected to the input bus, are connected, the collector-input transistor is connected to the power source, and the base through the resistor is connected to the output bus, and the emitter of the additional transistor is connected to other terminals of the charging diodes. I Sources of information taken into account during the examination 1. USSR author's certificate No. 406296, cl. H 03 K 5/01, 1971. 2. USSR author's certificate number 445138, cl. H 03 K 5/01, 29.05.72 (prototype). + € ejj 55fe6 nd "O e # cm J evi t CM lO N ) VI t h: