SU1725363A1 - Pulse generator - Google Patents

Abstract

The invention relates to a pulse technique and can be used in secondary power sources. The purpose of the invention is to increase reliability. The pulse generator contains a bridge, the shoulders of which consist of two transistors 1 and 2 and a capacitive voltage divider, respectively, in the diagonal of which is connected the primary winding 6 of the transformer 5, having a positive feedback winding 7, connected in series with a first resistor 10, a second resistor 11, the third resistor 12 and diode 13. Improving the reliability is provided by eliminating the saturation mode of the core of the transformer and ensuring that its magnetics are re-magnetized. The saturation mode of the core of the transformer 5 is eliminated by means of the RS-circuit from elements 9,10 (11), i.e. they set the frequency of self-oscillations of the generator less than the frequency of self-saturation of the transformer core. Balancing the amplitudes of the output voltage is ensured by the fact that one of the resistors 10, 11 is shunted by a diode, so that it is possible to adjust the resistance value of only one RC circuit. 1 il. WITH S

Description

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The invention relates to a pulse technique and can be used in secondary power sources.

The purpose of the invention is to increase reliability by increasing the reliability of the gap and the symmetry of the remagnetization of the transformer core.

The drawing shows a schematic diagram of a pulse generator.

The pulse generator contains transistors 1 and 2, capacitors 3 and 4 of capacitive voltage divider, transformer 5 with windings: main 6, positive feedback 7, output 8, capacitor 9 of RC circuit, resistors 10-12 and diode 13, at the same time, transistors 1 and 2 and capacitors 3 and 4 form the shoulders of a half-bridge inverter with the primary and secondary windings 6 and 8 of transformer 5, the emitters and bases of transistors 1 and 2 with different types of conductivity are combined and in series connected resistors 10 and 11 , capacitor 9, winding 7, resistors 10 and 11 is diode-shunted, and the base of the transistor 1 is connected to the plus of the source through a high-resistance resistor 12.

The generator works as follows.

When the power is turned on, the current from the plus source flows through the circuit: resistor 12, base-emitter junction of transistor 1, winding 6, capacitor 4, and the latter is charged. In this case, a voltage is induced in the winding 7, which facilitates the opening of the transistor 1. As soon as the capacitor 9 charges (plus on the right) the current through the winding 7 stops, the transistor 2 starts to open under the action of the voltage of the charged capacitor, resulting in a winding 7 the voltage to open up the transistor 2 and further the processes are repeated. The saturation mode of the core of the transformer 5 is eliminated by the RC circuit (element

Com. 9, 10, and 11), i.e. they set the frequency of self-oscillations of the generator less than the frequency of self-saturation of the transformer core. Balancing the output voltage amplitudes is ensured by the fact that one of the resistors 10 or 11 is shunted by a diode, so that it is possible to regulate the resistance value of only one RC circuit, for example, when charging a capacitor 9 in one direction, and in another direction the capacitor is discharged (recharged), mine this resistor through the diode.

Compared to what is known in the generator, the saturation core of the transformer is eliminated and its symmetry reversal is symmetric, which increases the reliability of the device, including more reliable starting. Forum and Pulse generator, containing a bridge, whose shoulders consist of two transistors and a capacitive voltage divider, respectively, the primary winding of the transformer is connected to the diagonal of the bridge, the first output winding is positive reverse the connection of which is connected to the emitter of the first transistor, two resistors, the first output of the first of which is connected to the base of the first transistor, characterized in that, in order to increase reliability, a third resistor, a diode and a capacitor are inserted into it, the second transistor p has the conductivity type opposite to the conductivity type of the first transistor; the second output winding of the positive feedback is connected through a series-connected capacitor, the second and third resistors to the bases of the transistors, the second output of the first resistor is connected to the collector of the first transistor, and a diode emitters bridges are interconnected.

Claims (1)

20 claims A pulse generator containing a bridge, the shoulders of which consist of two transistors and a capacitive voltage divider, respectively, the transformer primary winding is included in the diagonal of the bridge 25, the first output of the positive feedback winding of which is connected to the emitter of the first transistor, two resistors, the first output of the first of which is under 30 keys to the base of the first transistor, characterized in that, in order to increase reliability, a third resistor, a diode and a capacitor are introduced into it, while the second transistor is of the conductivity type, and 35 opposite to the type of conductivity of the first transistor, the second terminal of the positive feedback winding is connected through a series-connected capacitor, the second and third resistors to the bases of transistors 40, the second terminal of the first resistor is connected to the collector of the first transistor, and a diode is connected in parallel with the third resistor, the emitters of the bridge transistors are interconnected .