SU399049A1 - PULSET GENERATOR PULS12 - Google Patents

Description

The inventor refers to Ashuls.

RGz-iestny are nmnus generators, containing a resistive voltage divider and ps-sequential / C-day circuitry, which form the pillar circuit, the diagonal of which includes a comparison element of two transistors with collector-base links between them.

The proposed generator differs from; i: -i known in that the resistive divider is connected to the output of the emitter follower, whose input is connected to the midpoint of an additional serial / C-circuit, which makes it possible to obtain from the generator output a packet of pulses with successively increasing or successively decreasing intervals between them, depending on how the additional / C-circuit is connected to the source of pggani.

Pa drawing is a diagram of the proposed device.

The proposed generator contains, for the first time, a master circuit consisting of a resistor / and a co-generator 2, ti divider, which includes resistors 3 and 4, forming the BRIDGE circuit. The diagonal of the bridge includes an element of comparison on transistors 5 "6 different types of conductors. A divider consisting of resistors 3 and 4 is connected to the output of the Emitter repeater on the transistor 7, to the input of which a second time is connected to the master circuit including a switch 8 and a co-capacitor 9. To the output of the generator there is an input of a relay thyristor switch, which is load of the proposed generator.

The device works as follows.

When the supply voltage is applied, the capacitors 2} 9 begin to charge; they are up to the supply voltage through the resistors / and 8. The charging time of the capacitor 9 is chosen less than the minimum time of the capacitor 2, and as a result the resistance of the divider 3 is corresponding and 4, at iodac pptan 1, an impartial transition of the transistor 5 remains closed. As the co-capacitor 2 p 9 charges, the reverse voltage across the emitterio junction of the transistor 5 will change, at the beginning of the co-capacitor charge, it increases and then decreases. After the voltage across the Emitter junction, the line stor 5 passes through zero and becomes positive. the transistors 5 and 6. covered by positive feedback, turn on I and go to saturation:

5 prp. M. Capacitor 2 is discharged, and in the emitter of the negie transistor 6, the output and 1 pulse are formed. including thyristor 10. Thyristors // and 12 are not included, since normally open contacts (s) of relay 14 and contacts / 5 relay are included in their anode values.

16, and the duration of the pulse generated by the generator is less than the response time of the relay.

After the capacitor 2 is discharged, the transistors 5 1 and 6 return to the closed state. The next charge of capacitor 2 begins. At the moment when the voltage on this capacitor again exceeds the voltage on the resistor 4, the next output pulse is formed. When forming the capacitor 9, which is separated from the comparison element by the emitter capacitor 7, is not discharged and continues to be charged until the nannain line is low. Therefore, the voltage on the divider consisting of resistors 3 and 4 increases until capacitor 9 is fully charged. Due to this, the first few pulses after applying the supply voltage are formed at successively increasing intervals and.

For the resulting pulses with successively decreasing power transformers of the proposed generator, the resistor 8 is swapped and the capacitor 9. In this embodiment, the rising voltage on the capacitor 2 and the falling voltage on the resistor 4 are compared, thus increasing the stability of the intervals between pulses.

Subject invention

A pulse train generator containing a resistive voltage divider and a serial RC-MQiib, forming a bridge circuit, the diagonal of which includes a comparison element for two transistors of different conductivity with a collector-base connection between them, and s one of the arms is an alternator and a repeater different so that, for the purpose of obtaining successively changing the jux ix of the time intervals between the pulses of the filling, it has a resistive divider and is connected to the output of the emitter noviter, whose input is connected to the midpoint of the doiolitel1 o Prudential / S-eeei.

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