SU522542A1 - Pulse generator - Google Patents

Description

(54) PULSE GENERATOR

The invention relates to radio engineering and can be used to generate a scientific research institute for quasi-rectangular oscillations of sound frequency.

Known pulse generator containing transistors connected by a bridge circuit. The diagonal of the bridge includes the primary winding of the transformer. Between the midpoint of the primary winding of the transformer and the power source, a starting capacitor is connected, in series with which a diode is connected, and a shunt resistor l is parallel to the capacitor. The disadvantage of this generator is the distorted shape of the output voltage.

A pulse generator is known that contains a bridge with transistors shunted by anti-switched diodes, a source of control voltage with anti-phase outputs, including a power source in one diagonal of the bridge, and a load of 2J in the second.

Such a generator is characterized by the presence of switching surges of the collector current through transistors.

The aim of the invention is the elimination of switching surges of the collector current through the generator transistors.

For this, the antiphase outputs of the control voltage source are connected to thyristors with control inputs of transistors, a diode is connected in series with the power supply, and a forming circuit is connected parallel to the diode, the outputs of which are connected to the control electrodes of the thyristors, and the forming circuit contains a transformer whose primary winding is turned on parallel to the diode, and the secondary windings are connected in parallel to the gaps of the cathode of the control electrode of Tiri. tori. Thyristors can be light-guided, and the forming circuit can contain series-connected LEDs, connected meetings} o-parallel to the diode and optically coupled to the thyristors.

Fig. 1 shows an electrical circuit diagram of a generator forming a circuit of which is made on a transformer; fig. 2 - prince 1 pial electric

a generator circuit that forms a circuit that is made on LEDs,

The pulse generator contains a bridge transistors 1-4, shunted by opposite-connected diodes 5-8, corresponding to., But, the source 9 of the control voltage with gvuytivivfaznysh .; output1 di A pitugs source is included in one bridge diagonal, —a second load. 11. Phase outputs of the control voltage source 9 through thyristors 12 and 13 are connected to control inputs of transistors 2 and 4, Dvp: - /

RELATELY with a SOURCE POWER source

whose diode is 14, parallel to the KOTOpobiy subypes; —forming circuit l-5j outputs of which are connected to control, alternating electrodes of thyristors 12 and 13. Forward circuit 15 can be performed on transformer 16, the primary winding of which is connected parallel to diode 14, and Secondary arrays are connected in parallel to the gaps, the cathode is aligned with the 10 cd electrode of the h-chrysters 12 and 13.

Forming circuit 15 can be executed on series-connected LEDs 17-20 connected in parallel with respect to diode 14 and optically connected to thyristors 21 - | 24, which is made light-1/1-I.

The pulse generator works as a slave.

Suppose, in the initial form; (: open; thyristor 12 and transistors 2 a 3 lsga; At the same time, the load is 11 forg-route-etsz. For example, it is southern, the half-wave of the output voltage. With Civ-rsjie volyrgosty direction of source 9 to the output transition of transistor 2 and a clonstor 12 is applied to the power supply voltage. As soon as the TRC power cable 2 is connected, the inductive TC-KJ flows through the output dichunnel, and through the diode 5, it traces the path of the receiver, and the switch, and the switch, and the switch, the switch, and the switch, go to the tragazis hole, and then goes through the diode 5 to tragasis, and the switch, and the switch, and the switch, goes through the diode, and then goes to the tragazis hole, and the switch is connected to the tragazis switch. Padayuyu voltage to zero on the output diagonal bridge. on all the windings of the output of the blackout transformer 25, including on the abmatka; in the base circuit of the transistor 3. From this moment, the process of the output of the transistor 3 begins to saturate.The transistor 3 closes - i and the inductance current flowing in the output diagonal of the bridge, it drops through a diode B forming a circuit 15, a source 10 and a diode 8, and, depending on the structure of the forming circuit 15, the primary terminal of the international terminal | | ormator 16 or a chain of successively sized LEDs 17 - 2O and each input; noiTi T1 sensor dodarts unlocking nivs pulse.

The thyristor 12 is under the action of: the imprinting voltage of source 9 and does not react to the opening impulse 1 and the accelerator 13 is turned on and ensures that the unlocking current enters the base of the transistor 4, and the unlocking impulse i is formed in the base circuit of the transistor | if since jiocne turning off the transistor 3 jj II turning on the diode S the output diagonal of the bridge is under the inverse | Apr same HSJBM (on the right ESHUS, and on the left the minus) 1k 4 transistors. After that, the current is in the current output of the Lee bridge and until the next mixture is the same as the current 9; at a load of 11 | de8svuyt is negative the half-wave No. 1 of the output. After the next change of the ol reeAt of the source of the source 9, the processes in the generator with the following sequence,

1C, the thyristor 13 and the input of the transistor 4 are loaded. TpaiiancTop zap1faets 4, the inductive current flowing in the bridge diagonal vhhodnoy opens the diode 7, the voltage at the output falls to bridge diagonyli nude fsanpsoKesiie and disappears at the base of transistor 1. TranzyEeggor winding 1 is closed, is opened DIODE 6, to an output diagonal of the bridge when sladyva, alternate (plus left, MHiiyc on the right) j | The basic winding of transistor 3 forms a triggering pulse and at the same time induces AC5 current flowing in the MQCia diagonal through diode 6 and 7, excites the primary winding of the transformer 16 or LEDs 17 - 20 forms of the driving circuit 15, which leads to the turning on of the thyristor 12 or 22 and the supply of unlocking current to the base of transistor, torus 2, Transistors 2 and 3 are opened and. Before the next change in the polarity of the source 9, the half-wave voltage will again act on load 11.

Thus, the proposed oscillator 4pulsoCI1.a1yuchaet simultaneous switching of transistors 1-4j connected between the poles of the power source.

Claims (1)

1. A pulse generator containing a bridge with transistors shunted by counter-switched diodes, a control voltage source with antiphase outputs MHj, the power supply being included in one diagonal of the bridge, and the second with a load that in order to eliminate switching surges of the collector current through transistors, opposite BOfj) a3Hbse of the source yn}